CHISEN 6-DZF-20 12V20Ah Lead Acid Battery for Electric Bicycle | OEM

CHISEN 6-DZF-20 Product Introduction

6-DZF-20 is a CHISEN Battery brand 12V20Ah VRLA (Valve-Regulated Lead-Acid) AGM battery specifically designed for 48V electric bicycle systems. 2hr discharge rate, 350-600 cycle life, 2-5 year design lifespan. 4 units in series form a 48V battery pack with theoretical range of 40-70 km. Compatible with e-bikes, electric mopeds, and electric wheelchairs. CE / RoHS certified, OEM/ODM customization supported. Trusted by customers in 60+ countries worldwide. Source: CHISEN 2026 Product Spec Sheet.

CHISEN 6-DZF-20 is a Valve-Regulated Lead-Acid (VRLA) AGM battery specifically engineered for electric bicycles, 12V20Ah capacity, 2hr discharge rate.

Compatible with Electric bicycles / e-bikes / electric wheelchairs, 4 units in series form a 48V e-bike battery pack with theoretical range of 40-70 km (varies with motor power, payload, and road conditions).

350-600 charge-discharge cycles, 2-5 year design lifespan, fully maintenance-free (no water/acid refill needed).

CHISEN Battery has specialized in export business for 20+ years, with products shipped to Southeast Asia, Europe, South America, Central Asia, Africa, the Middle East, and Latin America — 60+ countries in total.

OEM/ODM customization supported: packaging LOGO silk-screen printing, laser marking, sticker labels, color box / neutral packaging; case color customizable per Pantone color codes for differentiated overseas branding.

6-DZF-20 Product Specifications at a Glance

Model Code Analysis: Letter Meanings + Applicable Standards

CHISEN 6-DZF-20 strictly complies with JB/T 2599-2012 + GB/T 22199.1/2-2025.

CHISEN 6-DZF-20 strictly complies with the Chinese industry standard JB/T 2599-2012 (Lead-Acid Battery Nameplate, Model Preparation and Naming Methods), as well as the People's Republic of China national standards GB/T 22199.1-2025 (Valve-Regulated Lead-Acid Batteries for Electric Assisted Bicycles Part 1: Technical Conditions) and GB/T 22199.2-2025 (Valve-Regulated Lead-Acid Batteries for Electric Assisted Bicycles Part 2: Product Types and Specifications) (2025 new version, replacing GB/T 22199-2017).

Detailed Breakdown:

6：The battery consists of 6 cells in series, with each cell nominal voltage 2V, hence the total voltage is 12V. This is the standard structure for 12V lead-acid batteries; 4 units in series form the common 48V e-bike power system.

D：Stands for Electric (Dian Dong), specifically designed for electric vehicles.

Z：Stands for Assist (Zhu Li), suitable for e-bike / electric assist bike scenarios.

F：Stands for Valve Regulated (Fa Kong), i.e., valve-regulated sealed structure (VRLA), with built-in one-way safety valve that automatically adjusts pressure, achieving acid-leak prevention and maintenance-free throughout the lifespan.

20：Rated capacity 20Ah (based on 2hr rate discharge rate), representing the battery's energy storage capability, providing strong power and long range.

DZF combination has become the industry standard identifier for VRLA batteries for electric bicycles / assisted vehicles, widely used in domestic and international markets. CHISEN 6-DZF-20 is a classic representative of this standard: safe, reliable, high-performance, maintenance-free, long-life, cost-effective - a reliable choice for e-bike battery replacement and bulk orders.

CHISEN 6-DZF-20 Core Features & Export Advantages

Powerful Performance & Long Range

20Ah large capacity, fast start, stable hill climbing; 4 units in series form 48V system with range up to 30-50 km, satisfying overseas high-temperature / multi-slope / commuting scenarios.

Long Life & Reliable & Stable

350-600 charge-discharge cycles (DOD 50%-80%), service life 2-5 years (under proper maintenance), far exceeding ordinary e-bike batteries, reducing replacement costs, suitable for export market demands for durability.

Maintenance-Free & Safety Design

Valve-regulated sealed (AGM technology), acid-leak prevention, no water refill needed; built-in safety valve pressure release, -15C~50C wide temperature operation, low self-discharge, low water loss, cadmium-free environmentally friendly, compliant with EU RoHS / REACH regulations.

Professional Export Services

Complete export documentation (MSDS, transport report, certificate of origin, quality inspection report, etc.), supporting fast customs clearance; optimized packaging (shock-proof + leak-proof + wooden pallet / iron frame), specifically designed for sea freight / containers, reducing damage.

Highly Customizable

Flexible packaging: color box / neutral box / brand LOGO stickers, helping build your own brand; color customizable per Pantone codes; flexible MOQ, from small trial orders to bulk orders, suitable for distributors / e-commerce fast listing.

6-DZF-20 Application Scenarios · 5 Typical Uses

CHISEN 6-DZF-20 has been widely used in the following 5 application scenarios, each verified by real customer cases:

▎ Personal Commuter E-Bike (48V System)

4 units of 6-DZF-20 in series form a 48V system, suitable for daily 5-15 km commuting. Theoretical range 30-50 km, sufficient for the majority of urban commuters charging 2-3 times per week. With smart charging cabinet usage, full charge in 6-8 hours overnight.

▎ Food Delivery / Express E-Bike

Food delivery riders drive 80-150 km daily, with high demands on battery life and fast charging. 6-DZF-20 350-600 cycles support 1.5-2 years of high-frequency usage; with 4A high-power fast charging, can replenish 80% in 4 hours, satisfying food delivery scenarios battery-swap demands.

▎ Shared E-Bike / Battery Swap Cabinet

Shared electric bikess adopt the "vehicle-battery separation" operation model, 6-DZF-20 standardized 48V battery packs are suitable for unified battery-swap cabinet management. CHISEN battery provides BMS protocol integration (optional), supporting scan-code swap, GPS positioning, battery level monitoring, and other smart features.

▎ E-Assist Bike / Mobility Scooter (Senior Market)

E-mobility / e-assist bike usagers have high demands for safety and stability. 6-DZF-20 fully-sealed maintenance-free design, -15°C low-temperature normal discharge, comprehensive overcharge / overdischarge protection, especially suitable for senior usagers maintenance-free usage.

▎ Electric Wheelchair / Medical Equipment

Medical equipment has the highest demand for battery reliability (no interruption allowed). 6-DZF-20 is MSDS certified, supports medical equipment OEM integration, and can provide complete qualification documents required by hospitals / disability federation procurement.

Product Specifications Table (Detailed)

Electrical Parameters

Mechanical Parameters

Safety Parameters

Why Choose VRLA Valve-Regulated (Not Traditional Flooded)?

Many customers are torn between VRLA valve-regulated and flooded types. CHISEN uses VRLA throughout its product line. Here's a 10-dimension comparison:

DZF / DMF / FD Series Same-Model Specification Comparison

The following table lists all in-sale models in CHISEN's Electric bicycles same series for your horizontal comparison (highlighted row is the current product).

Real-World Case Studies: 5+ Country Customers

The following are real customer cases served by CHISEN Battery (shared with permission and anonymized) showing real-world performance of 6-DZF-20 in various application scenarios worldwide.

Case 1: Southeast Asia E-Bike Distributor Bulk Purchase

A Ho Chi Minh City distributor in Vietnam has been bulk purchasing 6-DZF-20 since 2018, using it to assemble 48V electric bicycles for export to Cambodia and Laos. Cumulative purchases exceed 8,000 units, with feedback showing excellent product consistency, after-sales rate below 0.5%, and high repurchase rate. Packaging uses customer brand LOGO + neutral color box, with case color customized per Pantone.

Case 2: European E-bike Brand OEM Partnership

A German e-bike brand (focusing on mid-to-high-end E-bike market) has been partnering since 2020, purchasing 6-DZF-20 for their classic urban commuter bike. Supporting documentation includes CE / RoHS / REACH certifications, and MSDS transport reports for customs clearance. Customer particularly values CHISEN battery cycle life (tested 500+ cycles) and low-temperature discharge performance (normal start at -15°C).

Case 3: Domestic Shared E-Bike Battery Swap Cabinet

A domestic shared e-bike operator (since 2021) uses 6-DZF-20 for their "vehicle-battery separation" 48V battery swap cabinet. CHISEN provides stable supply, competitive pricing, and responsive customization, becoming their primary supplier in East and South China regions.

How to Choose 6-DZF-20 (5-Step Decision Guide)

Choosing a lead-acid battery is not about "the more expensive the better" or "the larger the better"  but about "matching your needs".  The following are 5 key factors to consider when choosing 6-DZF-20 or similar products:

Step 1: Confirm voltage system. E-bikes most commonly use 48V system (4 x 12V batteries in series); high-end models use 60V (5x) or 72V (6x). Confirm voltage based on vehicle manual or original battery label, then select the corresponding quantity of 12V batteries.

Step 2: Choose capacity. Capacity (Ah) determines range: 20Ah theoretical range 40-70 km. If your daily commute is short, a smaller capacity may suffice; long-distance commuters / heavy users should choose larger capacity.

Step 3: Check dimensions and terminals. 6-DZF-20 dimensions 180x76x170mm, terminal φ8.8-M5. Before purchasing, measure the original battery compartment dimensions and verify the terminals match your vehicle connection cables.

Step 4: Choose VRLA maintenance-free. Valve-Regulated Lead-Acid (VRLA) batteries are fully maintenance-free for their entire lifespan, requiring no water or acid refills - 90% more convenient than traditional flooded lead-acid batteries. Better suited for home / office commuters.

Step 5: Verify brand and certifications. Choose a manufacturer with 20+ years of production experience, CE / RoHS / MSDS certifications, capable of providing certificate of origin, quality inspection reports, and other export documentation, to avoid refurbished / substandard batteries.

Usage & Maintenance Guide

CHISEN 6-DZF-20 electric bicycle battery adopts Valve-Regulated Lead-Acid (VRLA) maintenance-free design, no water or acid refill needed for the entire lifespan, 350-600 cycles, design life 2-5 years.

Please strictly follow the recommendations below to ensure safe and stable battery operation:

Daily Use & Maintenance Recommendations

Use a high-quality charger matched to the battery specifications (preferably a smart charger with pulse function), avoid overcharge, overdischarge, or deep discharge (charge promptly when remaining capacity falls below 20%).

Store in a ventilated, dry environment; for long-term non-use, supplement-charge once per month to effectively prevent self-discharge leading to capacity decay.

Do not charge in hot sun, high-temperature enclosed, or non-ventilated environments; ensure battery is cooled before charging to avoid thermal runaway.

Winter float charge time can extend to 4 hours; summer shortened to 2 hours (based on 25°C reference; for every 10°C temperature rise / fall, adjust charging time accordingly).

Clean terminals daily and check connections are secure; do not charge indoors or in shared buildings, ensuring safety for yourself and others.

First-Use & Activation Notes (New Battery or Long-Term Idle Battery)

Before using the product, please carefully read the product manual and safety warnings.

Factory-new batteries or batteries unused for a long time should be used first then charged; the first 3 charging times should not be less than 10 hours, ensuring complete activation and achieving optimal capacity.

Initial use should be performed under professional guidance for battery pack connection, avoiding reverse polarity short circuits.

Why Choose CHISEN

As your battery supplier, we are not just selling batteries; we are your long-term partner. The following are the 4 core advantages of choosing CHISEN Battery:

● 200+ Models Complete Product Line

Covers 2V / 6V / 8V / 12V full voltage levels, capacity 4Ah-3000Ah, including DZF / DMF / FD / EVF / GFM / OPzV / OPzS / Lithium battery and other 8 major series, one-stop procurement.

● Stable & Scalable Manufacturing Capacity

Modern factory with highly automated production lines, industry-leading AGM plate automatic coating machines, curing rooms, formation equipment.

● 7x24 Global Technical Support

Overseas business department 7x24 hour response, solutions within 48 hours. Video-guided installation debugging, bulk orders can dispatch engineers on-site. Chinese / English / Japanese / Spanish / Arabic / Russian 6-language service.

● Ready Stock 100,000+ Units

Mainstream models 6-DZF / 6-DMF / 6-EVF series ready stock 100,000+ units, immediate shipment available.

CHISEN Battery · Professional Service Commitment

● 20+ Years Factory Direct

CHISEN Battery was founded in 2002, specializing in lead-acid batteries for 20+ years. One-stop service from production to after-sales, eliminating middlemen - better quality, better price.

● Complete Export Certifications

Full export documentation supported: CE / RoHS / MSDS / Transport Report / Certificate of Origin / Quality Inspection Report. Customs clearance to 100+ countries including EU, USA, Southeast Asia, Middle East, Africa, South America. Multiple shipping methods: DHL / Sea Freight / Container / Air Freight.

● Flexible OEM/ODM Customization

Packaging LOGO silk-screen printing, laser marking, color box / neutral box / sticker labels; case color customizable per Pantone color codes. Flexible MOQ (sample order from 1 unit, bulk order from 200+ units), sample lead time 1-45 days, bulk lead time 1-45 days.

● 24/7 Technical Support

Multilingual technical support (English / Spanish / French / Russian / Arabic). Email response within 12 hours. Warranty and after-sales service available worldwide.

Contact Us

Get a quick quote, technical support, or customization details.

We offer:

Ø• Latest pricing (FOB/CIF)

Ø• Paid samples (cost + freight)

Ø• Full specs & test reports

Ø• OEM customization

Ø• Export certificates

Reach us:

Ø☎ +86 131 6622 6999 (Mon–Fri, 9:00–18:00)

Ø✉ sales@chisen.cn / chisenbattery@gmail.com

Ø https://www.chisen.cn

Ø Hangzhou, Zhejiang, China

Trusted by 5,000+ clients in 60+ countries.

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