Update date: Jul 08, 2026 | N/A Pages | Report ID: EP-ES-001340
ASEAN Electric Vehicle VRLA Batteries Market
DMA IntelligenceASEAN Electric Vehicle VRLA Batteries Market Report 2026: Analyst-Verified Data & Forecast
Segments: By Type (Absorbed Glass Mat Battery, Gel Battery), By Vehicle Type (Two-Wheelers, Low-Speed EVs, Industrial Evs), Battery Type (Lithium-ion Battery, Lead-acid Battery, Sodium-ion Battery, Others Battery Types), Degree of Hybridization (Mild Hybrid (48 V MHEV), Full Hybrid (HEV), Plug-in Hybrid (PHEV), Range-Extender Hybrid), Voltage Class (Up to 60 V, 60 to 200 V, 200 to 400 V, Above 400 V), By Region, And Segment Forecasts
$1050.0M
Market Size, 2025
$1118.3M
Market Estimate, 2026
$1737.7M
Market Forecast, 2033
6.5%
CAGR, 2026–2033
ASEAN Electric Vehicle VRLA Batteries Market Size, Share & Key Insights
The ASEAN Electric Vehicle VRLA Batteries Market size was valued at USD 1050.00 Million in 2025, and the market is projected to grow from USD 1118.25 Million in 2026 to USD 1737.75 Million by 2033, growing at a CAGR of 6.5% during the forecast period 2026–2033. Indonesia, Vietnam, Laos, Thailand, Myanmar, Philippines, Rest of ASEAN Countries led the global market in 2025.
Study Overview
 Study Period | 2021 - 2033 |
 Base Year | 2025 |
 Estimated Year | 2026 |
 Forecast Period | 2026-2033 |
 Historical Range | 2021-2025 |
| Units | USD Million |
 Coverage | Indonesia, Vietnam, Laos, Thailand, Myanmar, Philippines, Rest of ASEAN Countries | Regional breakdown included |
 Deliverables | PDF + Excel Data Pack |
Major Market Players
Key Insights
- The ASEAN Electric Vehicle VRLA Batteries market is projected to grow from USD 1050.00 Million in 2025 to USD 1727.83 Million by 2033, exhibiting a robust CAGR of 6.50% over the forecast period.
- Indonesia is expected to remain the largest market in 2025, driven by its large population and proactive government policies promoting electric two-wheelers, while Vietnam is anticipated to be the fastest-growing market due to rapid urbanization and increasing EV adoption.
- The Flooded Lead Acid (FLA) battery segment holds the largest share by type, primarily due to its cost-effectiveness and proven reliability in low-speed electric vehicles, though AGM and GEL types are gaining traction for their improved performance characteristics.
Market Definiton and Strategic Context
The ASEAN Electric Vehicle VRLA Batteries Market refers to the industry segment focused on the manufacturing, distribution, and sales of Valve Regulated Lead-Acid (VRLA) batteries specifically designed for electric vehicles (EVs) across the Association of Southeast Asian Nations (ASEAN) region. These batteries are primarily used in applications such as e-bikes, e-scooters, and certain low-speed electric vehicles, offering a cost-effective and reliable power storage solution. The market encompasses various VRLA battery types, including Flooded Lead Acid (FLA), Gel Lead Acid (GEL), and Absorbed Glass Mat (AGM), each catering to specific performance and maintenance requirements. The growing adoption of electric two-wheelers and three-wheelers, driven by urbanization, increasing fuel prices, and government incentives for electric mobility, significantly contributes to the ASEAN Electric Vehicle VRLA Batteries market size. The market is characterized by ongoing advancements in battery technology aimed at improving energy density, cycle life, and charging efficiency, while maintaining affordability. Key factors influencing industry expansion include infrastructure development for charging, consumer preferences for eco-friendly transportation, and stringent emission regulations. The current market value for the ASEAN Electric Vehicle VRLA Batteries market stood at USD 1050.00 Million in 2025, with a positive growth outlook fueled by robust demand across member states. The market forecast indicates sustained growth as countries within ASEAN continue to promote electrification of their transportation sectors, making it a pivotal area for industry stakeholders and investors.
| Report Attribute | Details |
|---|---|
| Market size value in 2025 | USD 1,050.00 Million |
| Revenue forecast in 2033 | USD 1,737.75 Million |
| Growth rate | CAGR of 6.5% from 2025 to 2033 |
| Actual data | 2021 - 2024 |
| Forecast period | 2025 - 2033 |
| Quantitative units | Revenue in USD Million and CAGR from 2025 to 2033 |
| Report coverage | Revenue forecast, company share, competitive landscape, growth factors, and trends |
| Segments covered | By Type, By Vehicle Type, Battery Type, Degree of Hybridization, Voltage Class |
| Regional scope | Indonesia; Vietnam; Laos; Thailand; Myanmar; Philippines; Rest of ASEAN Countries |
| Country scope | All; All; All; All; All; All; All |
| Key companies profiled | GS Yuasa Corporation; Amara Raja Batteries Ltd; Exide Technologies; HBL Power Systems Ltd; PT. Trimitra Baterai Prakasa; Global Power Source Co., Ltd; Panasonic Corporation; CSB Battery; Leoch International Technology Limited; Narada Power Source Co., Ltd. |
| Customization scope | Free report customization (equivalent to 8 analysts working days) with purchase. Addition or alteration to country, regional & segment scope. |
| Pricing and purchase options | Avail customized purchase options to meet your exact research needs. Explore purchase options |
Growth Catalysts & Market Constraints
The ASEAN Electric Vehicle VRLA Batteries market is shaped by a complex interplay of growth catalysts and inherent constraints. The market's growth forecast is significantly influenced by the region's increasing focus on sustainable transportation and the affordability of VRLA battery technology for entry-level electric vehicles. Urbanization and rising disposable incomes in key ASEAN countries are driving the adoption of electric two-wheelers, which heavily rely on VRLA batteries, thereby expanding the ASEAN Electric Vehicle VRLA Batteries market size. However, challenges related to battery performance limitations and competition from advanced lithium-ion technologies pose considerable hurdles. Understanding these dynamics is crucial for stakeholders aiming to navigate the evolving landscape and capitalize on the industry's expansion trajectory.
Growth Drivers
- Growing demand for affordable electric two-wheelers and three-wheelers: The cost-effectiveness and proven reliability of VRLA batteries make them a preferred choice for the burgeoning e-bike, e-scooter, and e-rickshaw segments in ASEAN, particularly in developing economies where price sensitivity is high, thereby driving the market expansion.
- Government initiatives and subsidies promoting electric mobility: Several ASEAN governments are implementing supportive policies, tax incentives, and subsidies for EV adoption and manufacturing, which directly boosts the demand for EV components like VRLA batteries, fostering market growth and investment in the region.
Restraints
- Lower energy density and shorter cycle life compared to lithium-ion batteries: VRLA batteries inherently offer less energy per unit weight and volume and have fewer charge-discharge cycles than their lithium-ion counterparts, limiting their application in higher-performance or longer-range EVs and potentially impacting market share.
- Environmental concerns regarding lead recycling and disposal: The lead content in VRLA batteries poses significant environmental and health risks if not properly recycled or disposed of. Stringent environmental regulations and the high cost of compliant recycling processes can increase operational expenses for manufacturers.
Opportunities
- Technological advancements improving VRLA battery performance: Ongoing research and development efforts to enhance the energy density, charging speed, and longevity of VRLA batteries, such as improved plate design and electrolyte formulations, present opportunities to expand their application scope and competitiveness in the EV market.
- Expansion into new electric vehicle segments and niche applications: While dominant in two-wheelers, there's potential for VRLA batteries in emerging segments like electric forklifts, golf carts, and last-mile delivery vehicles within ASEAN, leveraging their robustness and lower cost for specific operational requirements.
Challenges
- Intense competition from rapidly evolving lithium-ion battery technology: The continuous decline in lithium-ion battery costs and their superior performance characteristics (lighter weight, higher energy density, longer life) pose a significant challenge, potentially displacing VRLA batteries from certain EV segments and limiting their long-term growth.
- Supply chain vulnerabilities and raw material price volatility: The market faces challenges related to the availability and fluctuating prices of key raw materials like lead, impacting production costs and profitability. Geopolitical factors and trade policies can further exacerbate supply chain disruptions for manufacturers.
Market Level Breakdown
The ASEAN Electric Vehicle VRLA Batteries market segmentation by Type includes Flooded Lead Acid (FLA), Gel Lead Acid (GEL), and Absorbed Glass Mat (AGM) batteries. FLA batteries traditionally hold the largest share due to their affordability and robustness, making them suitable for entry-level electric vehicles. GEL and AGM batteries, while typically more expensive, offer enhanced performance, longer cycle life, and maintenance-free operation, catering to consumers seeking improved reliability and convenience. The shift towards higher-performance electric two-wheelers is gradually boosting the adoption of GEL and AGM types, influencing the overall ASEAN Electric Vehicle VRLA Batteries market dynamics.
In terms of Vehicle Type, the market is segmented into E-Bikes, E-Scooters, and E-Motorcycles. E-Bikes and E-Scooters represent the largest segments, driven by rapid urbanization, traffic congestion, and the need for affordable personal mobility in ASEAN cities. These vehicles predominantly utilize VRLA batteries due to their cost-effectiveness. E-Motorcycles, while a smaller segment, are also growing, particularly with the introduction of more powerful models that can still leverage VRLA technology for certain applications, contributing significantly to the ASEAN Electric Vehicle VRLA Batteries market growth.
The Battery Type segmentation covers Deep Cycle, Starter, and Standby batteries. Deep Cycle VRLA batteries are critical for electric vehicles as they are designed to provide sustained power over long periods, making them ideal for propulsion. Starter batteries, while less common in pure EVs, may find applications in hybrid setups or ancillary systems. Standby batteries are typically used for backup power but can also be adapted for specific EV support functions. This categorization highlights the diverse applications and technical requirements within the ASEAN Electric Vehicle VRLA Batteries market.
The market is also segmented by Degree of Hybridization, including Micro Hybrid, Mild Hybrid, Full Hybrid, and Plug-in Hybrid. While VRLA batteries are less common in advanced full and plug-in hybrids which often use lithium-ion, they can be found in micro and mild hybrid systems where they support start-stop functionality and regenerative braking. This segment reflects the varying levels of electrification across the automotive spectrum in ASEAN and the role VRLA batteries play in supporting simpler hybrid architectures, impacting the overall ASEAN Electric Vehicle VRLA Batteries market outlook.
Voltage Class segmentation includes 12V, 24V, 36V, and 48V & Above. Lower voltage classes like 12V and 24V are commonly found in e-bikes and smaller e-scooters, providing basic power requirements. As vehicle performance and power demands increase, higher voltage systems such as 36V and 48V & Above become prevalent, particularly in more robust e-scooters and e-motorcycles. This classification is crucial for understanding the technical specifications and application suitability of VRLA batteries across the diverse range of electric vehicles in the ASEAN Electric Vehicle VRLA Batteries market.
ASEAN Electric Vehicle VRLA Batteries Segmentation Breakdown
- By Type
- Absorbed Glass Mat Battery
- Gel Battery
- By Vehicle Type
- Two-Wheelers
- Low-Speed EVs
- Industrial Evs
- Battery Type
- Lithium-ion Battery
- Lead-acid Battery
- Sodium-ion Battery
- Others Battery Types
- Degree of Hybridization
- Mild Hybrid (48 V MHEV)
- Full Hybrid (HEV)
- Plug-in Hybrid (PHEV)
- Range-Extender Hybrid
- Voltage Class
- Up to 60 V
- 60 to 200 V
- 200 to 400 V
- Above 400 V
Geographic Performance & Regional Trends
The ASEAN Electric Vehicle VRLA Batteries market is predominantly concentrated within the Asia Pacific region, specifically the ASEAN bloc, which accounts for 100% of the market consumption in 2025. This dominance is primarily driven by countries like Indonesia, which holds the largest market share due to its vast population, extensive motorcycle culture, and government initiatives promoting electric two-wheelers. Vietnam is identified as the fastest-growing market, experiencing rapid urbanization and increasing consumer adoption of electric scooters and bikes, supported by favorable regulatory frameworks. The robust ASEAN Electric Vehicle VRLA Batteries market growth in these nations is further fueled by rising fuel prices, environmental concerns, and the affordability of VRLA battery-powered EVs, making them attractive alternatives for daily commutes and last-mile delivery services. Infrastructure development for charging and battery swapping also plays a crucial role in enhancing regional adoption.
Regional Growth Drivers
- Indonesia: The large domestic market and government support, including subsidies for electric two-wheelers, are significant drivers. This fosters local manufacturing and increases the penetration of VRLA battery-powered e-bikes and e-scooters, especially in densely populated urban areas like Jakarta.
- Vietnam: Rapid urbanization and a strong preference for two-wheeled transportation contribute to high adoption rates of electric vehicles. Government incentives and a growing network of charging stations further accelerate the demand for VRLA batteries in cities like Hanoi and Ho Chi Minh City.
- Thailand: The country's push towards becoming an EV production hub in Southeast Asia, coupled with consumer awareness campaigns and infrastructure development, is boosting the demand for electric motorcycles and thereby VRLA batteries, particularly in regions like Bangkok.
- Philippines: Increasing fuel costs and growing environmental consciousness are prompting a shift towards more economical and eco-friendly transportation options. Government programs promoting electric tricycles and e-jeepneys are driving the VRLA battery market in urban centers like Manila.
- Rest of ASEAN Countries (including Malaysia, Singapore, Cambodia, Laos, Myanmar, and Brunei): While smaller individually, collective efforts towards sustainable mobility, infrastructure investments, and cross-border initiatives are cumulatively contributing to the regional demand for VRLA batteries in EVs.
Looking ahead, the regional forecast for the ASEAN Electric Vehicle VRLA Batteries market indicates a continued divergence between mature and emerging economies within the bloc. While countries like Indonesia and Thailand are focused on expanding manufacturing capabilities and diversifying EV types, emerging markets such as Vietnam and the Philippines will likely see accelerated adoption of basic electric two-wheelers. This trajectory presents strategic implications for suppliers, requiring localized product offerings and distribution strategies tailored to varying levels of economic development and regulatory support. Investment in recycling infrastructure will also be crucial to address the environmental footprint and ensure sustainable growth across all ASEAN nations.
Competitive Insights & Leading Companies
The ASEAN Electric Vehicle VRLA Batteries competitive landscape is moderately consolidated, characterized by a mix of established global players and prominent regional manufacturers. While large international battery companies often dominate in terms of technology and production scale, local players benefit from strong distribution networks, cost advantages, and a better understanding of regional consumer preferences and regulatory nuances. Competition revolves around several key levers, including pricing strategies, particularly for the price-sensitive e-bike and e-scooter segments, and the efficiency of distribution channels to reach diverse markets across the ASEAN countries. Product innovation, focusing on extending battery life, improving charging efficiency, and enhancing durability for specific climatic conditions, is also a critical differentiator. Furthermore, adherence to local regulatory approvals and certifications is paramount for market entry and sustained growth. Companies are increasingly investing in R&D to develop maintenance-free and longer-lasting VRLA solutions to stay competitive against the backdrop of evolving battery technologies.
Strategic actions within the ASEAN Electric Vehicle VRLA Batteries market frequently involve partnerships between battery manufacturers and EV assemblers, facilitating integrated solutions and expanding market reach. Product launches focus on specialized VRLA batteries optimized for different EV types, such as deep-cycle batteries for electric rickshaws or high-power batteries for performance e-motorcycles. Market expansion often includes setting up new manufacturing facilities or assembly plants within ASEAN to leverage local resources and reduce import duties. Companies are also differentiating themselves through robust after-sales service, warranty programs, and the development of efficient battery recycling initiatives, which address environmental concerns and improve brand reputation. However, the industry faces challenges such as margin pressure due to intense price competition, the need for continuous investment in R&D to counter the advancements in lithium-ion technology, and ensuring compliance with varied environmental regulations across different ASEAN member states. Supply chain risks, particularly concerning the sourcing and price volatility of lead, also compel companies to diversify suppliers and explore more resilient procurement strategies.
ASEAN Electric Vehicle VRLA Batteries Key Companies
- GS Yuasa Corporation
- Amara Raja Batteries Ltd
- Exide Technologies
- HBL Power Systems Ltd
- PT. Trimitra Baterai Prakasa
- Global Power Source Co., Ltd
- Panasonic Corporation
- CSB Battery
- Leoch International Technology Limited
- Narada Power Source Co., Ltd
ASEAN Electric Vehicle VRLA Batteries Market Ecosystem
Ecosystem Participants
- Raw Material Suppliers — provide essential components like lead, sulfuric acid, and plastic casings to battery manufacturers. These suppliers are crucial for the initial stages of the value chain, ensuring the quality and availability of materials that directly impact battery performance and cost.
- Lead mining companies extract and process lead ore, while chemical manufacturers supply high-purity sulfuric acid, both vital for VRLA battery production. Their reliability and adherence to environmental standards directly influence the sustainability of the entire ecosystem.
- Battery Manufacturers — design, produce, and assemble VRLA batteries for various EV applications. These companies are at the core of the market, innovating to improve battery efficiency, lifespan, and safety while managing complex production processes and quality control.
- Manufacturers like GS Yuasa and Exide Technologies leverage advanced engineering and production facilities to meet the diverse demands of the EV market, often engaging in R&D to enhance battery technology and reduce manufacturing costs.
- Electric Vehicle Original Equipment Manufacturers (EV OEMs) — integrate VRLA batteries into their e-bikes, e-scooters, e-motorcycles, and other low-speed EVs. They are key demand-side players, influencing battery specifications and purchase volumes.
- OEMs collaborate closely with battery manufacturers to ensure compatibility, performance, and optimal integration of battery packs into their vehicle designs, often leading to co-development efforts for specialized battery solutions.
- Distributors and Retailers — form the bridge between manufacturers and end-users, handling logistics, warehousing, and sales. Their extensive networks are critical for market penetration and ensuring product availability across diverse geographic areas within ASEAN.
- These entities manage inventory, provide customer support, and often offer installation and maintenance services, playing a vital role in consumer access and satisfaction.
- Charging Infrastructure Providers — develop and operate charging stations and battery swapping networks, enabling convenient and efficient recharging for EV users. Their services are essential for alleviating range anxiety and promoting wider EV adoption.
- This segment includes companies offering public charging points, home charging solutions, and innovative battery swapping services, directly impacting the usability and practicality of VRLA-powered EVs.
- Recycling and Waste Management Companies — handle the collection, processing, and safe disposal or recycling of spent VRLA batteries. These participants are crucial for environmental sustainability and resource recovery within the ecosystem.
- They ensure that hazardous materials are managed responsibly, recovering valuable lead and other components to re-enter the production cycle, thereby supporting a circular economy.
- Government and Regulatory Bodies — establish policies, incentives, and environmental regulations impacting the EV and battery industries. Their actions shape market dynamics, encourage investment, and ensure compliance.
- These bodies implement subsidies for EV purchases, set emission standards, and enforce battery disposal and recycling guidelines, directly influencing the operational framework for all market participants.
- Research and Development Institutions — conduct studies and develop new technologies to improve battery performance, reduce costs, and enhance environmental friendliness. They are vital for long-term innovation and competitiveness.
- Academic institutions and private research firms contribute to advancements in VRLA chemistry, manufacturing processes, and energy storage solutions, pushing the boundaries of what is possible in the EV battery sector.
Report Coverage & Key Deliverables
The report delivers a comprehensive analysis of the ASEAN Electric Vehicle VRLA Batteries, combining quantitative data with qualitative insights. It offers a detailed examination of market trends, growth drivers, restraints, opportunities, and challenges shaping the industry across the ASEAN region. Decision-makers can leverage this report to gain a profound understanding of market dynamics, competitive strategies, and future growth prospects, enabling informed strategic planning and investment decisions. The study provides granular insights into market segmentation by battery type, vehicle type, and voltage class, offering a holistic view of the market's structure and potential. Furthermore, a thorough regional analysis highlights key country-level developments and growth trajectories, empowering businesses to identify lucrative markets and tailor their expansion strategies effectively. This report serves as an indispensable tool for stakeholders seeking to navigate the complexities of the ASEAN EV VRLA battery landscape and capitalize on emerging opportunities.
Report Coverage
- Market Size Estimates (historical and forecast)
- The report provides historical market size data spanning from 2021 to 2025, coupled with comprehensive market forecasts extending up to 2033. These estimates are meticulously derived using a robust research methodology that integrates primary and secondary data sources, ensuring accuracy and reliability for strategic planning.
- Detailed Segmentation And Revenue Analysis
- A granular breakdown of the market is offered across various segments including battery type (FLA, GEL, AGM), vehicle type (E-Bikes, E-Scooters, E-Motorcycles), and voltage class. Each segment's revenue contribution and growth trajectory are analyzed to provide a clear understanding of market composition and high-growth areas.
- Regional And Country-Level Insights
- The study offers in-depth analysis of key ASEAN countries such as Indonesia, Vietnam, and Thailand, highlighting their unique market dynamics, regulatory landscapes, and consumer adoption patterns. This regional perspective enables businesses to identify market maturity, competitive intensity, and growth contrasts across the diverse ASEAN bloc.
- Competitive Benchmarking Of Key Players
- An extensive competitive analysis profiles leading market participants, assessing their product portfolios, strategic initiatives, market shares, and key strengths. This section provides critical insights into the competitive landscape, helping stakeholders benchmark their performance and identify potential partnership or acquisition targets.
- Customization Options Based on Specific Requirements
- Clients can avail customization options, allowing them to tailor the report's scope to their specific business needs. This includes additional segment breakdowns, country-specific deep dives, or competitive intelligence on particular companies, ensuring maximum relevance and actionable insights.
Recent Industry Insights
The ASEAN Electric Vehicle VRLA Batteries industry trends over the past 12-18 months reflect a dynamic landscape shaped by increasing EV adoption and technological advancements. Several partnerships have emerged between local battery manufacturers and international EV brands, aiming to localize production and optimize supply chains. For instance, in Indonesia, collaborations between major battery players and e-motorcycle manufacturers have accelerated the development of cost-effective VRLA solutions tailored for the local market. Regulatory changes, such as enhanced government subsidies for electric two-wheelers in Vietnam and Thailand, have significantly boosted consumer demand. Product launches have focused on improving the cycle life and energy density of VRLA batteries, addressing previous limitations. Overall, the market is experiencing a push towards greater sustainability, with increased emphasis on battery recycling initiatives across the region, indicating a maturing ecosystem and a strategic response to environmental concerns.
Key Market Developments
- August 2024: Indonesia announced further incentives for electric two-wheeler purchases, aiming to boost local manufacturing and VRLA battery demand.
- June 2024: Amara Raja Batteries Ltd reportedly expanded its distribution network in Thailand to cater to the growing electric scooter market.
- April 2024: A major Vietnamese EV manufacturer partnered with a local VRLA battery supplier to ensure a stable and localized supply chain for their e-bike production.
- February 2024: GS Yuasa Corporation launched a new line of enhanced VRLA batteries designed for longer cycle life in urban electric vehicles across ASEAN.
- November 2023: Philippines government initiatives focused on electrifying public transport, including electric tricycles, spurred increased demand for VRLA batteries.
Analyst Opinion
The ASEAN Electric Vehicle VRLA Batteries market outlook remains positive, driven primarily by the strong demand for affordable electric two-wheelers and three-wheelers across the region. Market attractiveness is high, especially in populous and rapidly urbanizing countries like Indonesia and Vietnam, where VRLA batteries offer a cost-effective entry point into electric mobility. The competitive intensity is moderately consolidated, with a few large players dominating but significant space for regional manufacturers who can cater to local needs and price sensitivities. The demand-supply balance is currently stable, with manufacturing capabilities generally keeping pace with the rising adoption rates. However, potential supply chain disruptions, particularly concerning lead, could impact this balance. The market benefits from supportive government policies and increasing environmental awareness, which collectively create a conducive environment for sustained growth, making it an appealing sector for strategic investments, particularly in localized production and distribution networks.
The long-term outlook for the ASEAN Electric Vehicle VRLA Batteries market suggests continued growth, albeit with an increasing influence from evolving battery technologies. While lithium-ion batteries are gaining traction in higher-performance EV segments, VRLA batteries are expected to retain their dominance in the cost-sensitive, low-speed EV categories due to their affordability and established infrastructure. The innovation landscape is focused on incremental improvements in VRLA battery performance, such as enhanced cycle life, faster charging, and reduced weight, to maintain competitiveness. Key risk factors include the rapid advancements and decreasing costs of lithium-ion technology, which could eventually challenge VRLA's market share in broader applications. Additionally, stringent environmental regulations regarding lead content and recycling pose operational challenges. Strategic implications involve continuous R&D investment, strengthening regional supply chains, and exploring hybrid battery solutions to capitalize on the unique strengths of VRLA technology in specific ASEAN market niches while mitigating competitive pressures from newer battery chemistries.