6-EVF-70 12V70Ah Lead Acid Battery for Electric Vehicles: Specifications, Applications & Buyer’s Guide for B2B Distributors 2026
Lead: The 6-EVF-70 is a 12V 70Ah (C₃) valve-regulated lead-acid (VRLA) deep-cycle battery widely deployed in mid-sized electric road vehicles — 4-6 seat sightseeing cars, light electric tricycles, e-rickshaws, and electric floor-cleaning equipment. With 350-600 cycle life (DOD 50%-80%), 48V / 60V / 72V system compatibility, and CHISEN’s 20+ year tubular plate and AGM / gel expertise, the 6-EVF-70 is one of the most reliable mid-capacity EVF models for export distributors in 2026.
5 Key Takeaways
- 12V 70Ah (C₃) VRLA deep-cycle battery — AGM / gel valve-regulated sealed, fully maintenance-free, designed for mid-sized electric road vehicles including e-tricycles, sightseeing cars, e-rickshaws, and floor-cleaning machines.
- 48V / 60V / 72V system flexibility — 4 units in series form a 48V system (standard e-rickshaw / sightseeing configuration); 5 units form 60V; 6 units form 72V. Suits almost all mid-capacity EV architectures.
- 350-600 cycle life at DOD 50%-80% — meets GB/T 32620.1-2016 standard, design life 2-5 years, designed for daily deep-cycle commercial operation in hot, humid, and high-vibration conditions.
- Mid-capacity balance (70Ah) — 10Ah lighter and 5-8% more compact than the 80Ah 6-EVF-80; 10Ah more powerful than the 60Ah 6-EVF-60; ideal sweet spot for 4-6 seat sightseeing cars and 60V e-tricycles.
- CHISEN 20+ year OEM/ODM expert — factory-direct supply, 60+ country export coverage, complete CE / RoHS / REACH / MSDS / IMDG documentation, multilingual technical support in English / Spanish / Portuguese / Arabic / Russian / French / German.
- Premature capacity loss in hot climates. Many low-cost 70Ah batteries use thin flat plates, low-purity lead (94-97%), and standard paste. In tropical or desert regions (Southeast Asia, Middle East, Africa, Latin America), 45-50°C operating temperatures accelerate grid corrosion and water loss. Buyers report 30-40% capacity drop within 12 months, far below the 24-month expectation.
- Sulfation from incomplete charging. Electric vehicle fleets (e-rickshaws, sightseeing cars, e-tricycles) often use shared charging stations with mismatched chargers. Inconsistent voltage (below 14.4V) causes chronic undercharging, sulfation buildup, and irreversible capacity loss — sometimes after just 6 months.
- Vibration damage in rough terrain. E-tricycles on unpaved village roads, off-road resort shuttles, and warehouse floor-cleaning machines expose batteries to continuous 3g+ vibration. Batteries with weak plate groups or thin inter-cell connections crack internally, causing sudden failure mid-route.
- Voltage imbalance in series strings. In a 48V system (4 × 12V in series), the weakest battery drags down the entire pack. If one 12V 70Ah unit drops to 10.5V, the whole system fails. Without matched cells and proper Battery Management System, distributors handle expensive full-pack replacements under warranty.
- 48V system = 4 units in series (most common e-rickshaw, 4-seat sightseeing, e-tricycle)
- 60V system = 5 units in series (medium-duty passenger e-rickshaw, mid-power delivery trike)
- 72V system = 6 units in series (6-8 seat sightseeing, light utility EV, electric sweepers)
- 70Ah @ 48V (4 units) = 3.36 kWh total. Theoretical range for 4-seat sightseeing: 50-80 km / day.
- For 50-70 km / day operation: 70Ah is the sweet spot.
- For 80-100 km / day: consider 80Ah (6-EVF-80) or 100Ah (6-EVF-100) instead.
- For 30-50 km / day: 60Ah (6-EVF-60) may be more cost-effective.
- Rule of thumb: actual range = theoretical × 0.7 (account for load, terrain, temperature, depth-of-discharge limits).
- Battery compartment dimensions can fit the dimensions.
- Vehicle frame can support the total weight (4 units = ~93 kg for 48V system).
- Terminal orientation (φ16-M6 top-mount) is accessible for wiring.
- Float voltage 13.5V (2.25V/cell) at 25°C
- Equalize voltage 14.1V (2.35V/cell) for recovery
- Charging current ≤ 14A (0.20C₃) — never exceed 0.25C₃
- Temperature compensation: -3.3mV/°C/cell
- 3-stage smart charger strongly recommended (bulk / absorption / float)
- 10+ years of VRLA AGM / gel manufacturing experience (CHISEN has 20+ years).
- Direct factory supply (eliminates 30-50% distributor markup).
- Complete export documentation (MSDS, IMDG Class 8, CE, RoHS, REACH).
- OEM/ODM support for branding and packaging.
- Minimum 1-year warranty, ideally 2 years for commercial use.
- 8 production bases globally, total annual capacity 70 million kVAh
- Daily production capacity 20,000+ units across all lines
- 100,000+ units of 6-DZF / 6-DMF / 6-EVF series in ready stock for immediate shipment
- Modern AGM plate production lines (automated coating, curing, formation)
- Full ISO 9001 / ISO 14001 / UL / IEC / CE certification
- 100% capacity testing before shipment
- Vibration test compliant with GB/T 32620.1 (3g for 2 hours)
- 45°C high-temperature accelerated life test
- -20°C low-temperature capacity test
- ISO 9001:2015 quality management system
- CE (European Conformity)
- RoHS (Restriction of Hazardous Substances)
- REACH (EU chemical regulation)
- MSDS (Material Safety Data Sheet)
- IMDG Class 8 / UN2794 (sea freight)
- BIS / SASO / SONCAP / PVOC / ESMA (country-specific on request)
- For distributors, e-commerce sellers, and engineering validation
- MOQ: 1 unit (sample) or 5 units (small lot)
- Lead time: 3-7 days
- Custom packaging available from 100 units
- For OEM manufacturers, large distributors, government tenders
- MOQ: 200 units (bulk) — negotiable for large tenders
- Lead time: 15-45 days depending on customization
- Includes: technical documentation, training videos, custom branding
- For 1000+ units / year or major government / utility projects
- Customizable terms: pricing, lead time, payment, exclusive distribution
- Includes: on-site technical support, dedicated account manager
- Logo silk-screen printing on battery case
- Laser marking of batch code, serial number, custom text
- Color box / neutral box / branded packaging
- Custom case color per Pantone code
- Multilingual user manuals and labels (English / Spanish / Portuguese / Arabic / Russian / French / German)
- Custom terminal types (M5 / M6 / M8 available)
- Email: sales@chisen.cn
- WhatsApp / Phone: +86 131 6622 6999 (wa.me/8613166226999)
- Website (English): [https://www.chisen.cn](https://www.chisen.cn)
- Website (Spanish): [https://www.chisen.cn/es/](https://www.chisen.cn/es/)
- Product page: [https://www.chisen.cn/12V70Ah/6-EVF-70.html](https://www.chisen.cn/12V70Ah/6-EVF-70.html)
- Energy site: [https://www.chisenenergy.com](https://www.chisenenergy.com)
- 8 production bases, 70 million kVAh annual capacity
- 100,000+ units ready stock for immediate shipment
- CE / RoHS / REACH / ISO 9001 / ISO 14001 / UL / IEC certified
- 24/7 multilingual support (EN / ES / PT / AR / RU / FR / DE)
- Free sizing consultation and battery bank configuration for 48V / 60V / 72V systems
Core Specifications at a Glance
| Parameter | Value | Standard / Note |
|---|---|---|
| Model | 6-EVF-70 | EVF Series (Electric Vehicle VRLA) |
| Rated Voltage | 12V (DC) | 6 cells × 2V/cell in series |
| Rated Capacity | 70Ah (C₃ / 3hr rate) | Discharge to 1.68V/cell |
| Dimensions (L×W×H) | 259 × 170 × 210 mm | Total height 210 mm |
| Weight | 23.3 ± 0.2 kg | (51.4 lbs) |
| Terminal | φ16-M6 | M6 insert, 10-12 N·m torque |
| Battery Type | VRLA (Valve-Regulated Lead-Acid) | AGM / Gel electrolyte |
| Working Temperature | -15°C ~ 50°C | Discharge / charge range |
| Cycle Life | 350-600 cycles | DOD 50%-80%, GB/T 32620.1 |
| Design Life | 2-5 years | 25°C float, proper maintenance |
| Float Voltage | 13.5V (2.25V/cell) | 25°C |
| Equalize Voltage | 14.1V (2.35V/cell) | Recovery charge |
| Charging Current | ≤ 14A (0.20C₃) | Recommended limit |
| Cutoff Voltage | 1.75V/cell | 3-hour rate discharge |
| Self-Discharge | ≤ 3%/month | 25°C |
| Safety Valve | 10-49 kPa | Auto pressure regulation |
| Certifications | CE / RoHS / REACH / MSDS | IMDG Class 8 / UN2794 |
| Country of Origin | China (Jiangsu, Suqian) | CHISEN factory direct |
| Standards | GB/T 32620.1-2016 / GB/T 32620.2-2016 / JB/T 2599 | Compliant |
The Pain: Why Most 70Ah EV Batteries Fail in the Field
B2B distributors and OEM buyers of 12V 70Ah EV batteries in 2026 face four recurring pain points that drive warranty claims and damage end-customer trust:
The 6-EVF-70 from CHISEN is engineered to address each of these four failure modes — let us show you how.
The Choice: 6-EVF-70 vs Other 70Ah EV Batteries
How does the CHISEN 6-EVF-70 compare to three common 70Ah alternatives? Here is a side-by-side technical comparison for B2B procurement teams.
| Specification | CHISEN 6-EVF-70 (VRLA AGM/Gel) | Standard Sealed Lead-Acid 70Ah | Flooded Lead-Acid 70Ah | Low-Cost Lithium 70Ah (LFP) |
|---|---|---|---|---|
| Maintenance | Maintenance-free (valve-regulated) | Maintenance-free | Requires water top-up every 3-6 months | Maintenance-free (BMS required) |
| Cycle Life (DOD 80%) | 350-600 cycles | 200-300 cycles | 300-400 cycles | 2000+ cycles |
| Weight | 23.3 kg | 21-24 kg | 24-27 kg | 9-11 kg |
| Operating Temp | -15°C to 50°C | -10°C to 40°C | 0°C to 40°C | 0°C to 45°C (cold weather penalty) |
| Initial Cost (per kWh) | $120-150 / kWh | $100-130 / kWh | $80-100 / kWh | $260-360 / kWh |
| Total Cost of Ownership (5 yrs) | Lowest (1.0x baseline) | 1.3-1.5x (more frequent replacement) | 1.2-1.4x (labor + water) | 1.6-2.2x (initial cost dominates) |
| High-Rate Discharge | Excellent (thickened plates) | Average | Average | Excellent |
| Vibration Resistance | High (AGM + reinforced case) | Average | Low (liquid sloshing) | High (rigid cells) |
| Installation Direction | Any (vertical / horizontal / side) | Any | Vertical only | Any (with BMS mounting) |
| Recycling Infrastructure | Mature (lead recycling 95%+) | Mature | Mature | Limited (lifecycle) |
| Fire / Thermal Runaway Risk | Very low (sealed, no thermal runaway) | Very low | Low | Higher (BMS critical) |
| Best For | EV fleets, e-rickshaws, sightseeing, e-tricycles | Consumer / light use | Stationary backup | Premium / weight-sensitive |
Verdict: For B2B buyers running commercial mid-capacity electric vehicle fleets (sightseeing tour operators, e-rickshaw distributors, e-tricycle assemblers, floor-cleaning OEMs), the 6-EVF-70 delivers the best balance of cost, durability, safety, and recycling infrastructure. Lithium offers longer cycle life but at 2-3x initial cost — economically viable only for weight-critical applications.
The Framework: 5-Step Selection Guide for 6-EVF-70 Buyers
Follow this 5-step framework to determine if the 6-EVF-70 is the right battery for your market:
Step 1: Verify voltage system.
The 6-EVF-70 is a 12V single block. Common configurations:
Step 2: Match capacity to daily range requirement.
Step 3: Validate physical dimensions and weight.
The 6-EVF-70 measures 259 × 170 × 210 mm and weighs 23.3 kg. Confirm:
Step 4: Check charger compatibility.
The 6-EVF-70 requires:
Step 5: Source from an experienced OEM/ODM manufacturer.
Look for:
The Trust: CHISEN Quality and Manufacturing Excellence
The 6-EVF-70 is built on CHISEN’s 20+ years of VRLA AGM / gel manufacturing heritage.
Factory and Production Capacity:
Product Engineering Details:
| Component | Material / Specification | Function |
|---|---|---|
| Positive plate | Thickened flat plate with high-density lead paste | Long cycle life and high-rate discharge |
| Negative plate | Lead-calcium alloy with carbon additive | Low self-discharge and improved charge acceptance |
| Separator | AGM (absorbed glass mat) or Gel electrolyte | Immobilized electrolyte, spill-proof |
| Container | High-strength ABS (UL94 V-0 flame retardant) | Impact resistance, no leakage |
| Cover | Sealed ABS resin with integrated safety valve | Auto pressure regulation (10-49 kPa) |
| Terminal | φ16-M6 copper insert | Low resistance, high conductivity |
| Safety valve | Triple-sealed EPDM rubber + anti-explosion filter | Prevents acid mist release |
Quality Control:
Global Compliance:
Real-World Customer Case Studies (5+ Countries):
Case 1 — Thailand Sightseeing Tour Operator: A Chiang Mai tour company (since 2022) replaced their 4-seat electric sightseeing fleet with CHISEN 48V systems (4 × 6-EVF-70 in series). Operating 8-10 hours daily in mountainous terrain with frequent hill climbs, the batteries delivered 500+ cycles over 2.5 years with consistent 82% capacity retention. Customer feedback: “Strong climbing power, no thermal events, 40% lower replacement cost vs previous supplier.”
Case 2 — Italy Industrial Cleaning OEM: A Milan-based industrial cleaning equipment manufacturer (since 2023) selected CHISEN 6-EVF-70 for their 24V floor-scrubber battery packs. Operating in commercial warehouses and shopping centers for 6-8 hours daily, the batteries showed 88% capacity retention after 18 months. Customer reported: “Plug-and-play integration, no BMS issues, easy Italian-language technical support.”
Case 3 — Mexico E-Tricycle Assembly Plant: A Guadalajara e-tricycle manufacturer (since 2024) integrated CHISEN 6-EVF-70 into their 60V e-tricycle product line for Latin American export. Daily passenger operations of 60-80 km per charge, with 5 hours of continuous operation. Customer noted: “Reliable performance in Mexico’s 35-42°C ambient temperatures, no swelling incidents.”
Case 4 — Bangladesh E-Rickshaw Distributor: A Dhaka e-rickshaw distributor (since 2023) switched from generic 70Ah batteries to CHISEN 6-EVF-70 for their 48V e-rickshaw product line. Daily passenger trips of 70-90 km on a single charge with 4-5 hours of operation. Driver feedback: “Stronger pickup at traffic lights, less range anxiety in monsoon season.”
Case 5 — UAE Desert Resort Shuttle: A luxury Abu Dhabi desert resort (since 2024) ordered 6-EVF-70 48V systems for 6-seater electric shuttle vehicles. Operating in 45-50°C ambient temperatures, the batteries passed the 6-month high-heat stability test with zero electrolyte loss. Customer commented: “Unlike competitor batteries, no swelling or thermal events.”
How to Buy 6-EVF-70 from CHISEN: 3 Simple Options
Option 1 — Sample Order (1-5 units):
Option 2 — Bulk Order (200+ units):
Option 3 — Long-Term Supply Agreement (annual contract):
OEM/ODM Customization Options:
Frequently Asked Questions (FAQs) about 6-EVF-70
Q1: What is the 6-EVF-70 typically used for?
A: The 6-EVF-70 is a 12V 70Ah deep-cycle VRLA battery designed for mid-sized electric road vehicles: 4-seat sightseeing cars, e-tricycles, e-rickshaws, light-duty electric floor scrubbers, and warehouse AGVs. It is the most popular mid-capacity EVF size for commercial 48V-60V electric vehicle applications.
Q2: How many 6-EVF-70 batteries do I need for a 48V system?
A: Four 6-EVF-70 batteries connected in series. Each battery is 12V, so 4 × 12V = 48V. This is the standard configuration for e-rickshaws, 4-seat sightseeing cars, and most e-tricycles. For 60V systems, use 5 batteries; for 72V systems, use 6 batteries.
Q3: What is the cycle life of the 6-EVF-70?
A: Per GB/T 32620.1-2016 testing, the 6-EVF-70 delivers 350-600 charge-discharge cycles at 50%-80% depth of discharge (DOD). In real-world fleet use, expect 2-5 years of service depending on operating conditions (depth of discharge, temperature, charging habits, vibration exposure).
Q4: Can the 6-EVF-70 be used in extreme temperatures?
A: Yes. The 6-EVF-70 operates from -15°C to 50°C. For cold-climate applications (below -10°C), charging efficiency decreases and capacity drops temporarily; warming the battery before charging is best practice. For hot-climate operations (above 45°C), the battery is engineered with reinforced grid alloy and low-water-loss design for stable service.
Q5: What is the difference between 6-EVF-70 and 6-EVF-80?
A: 6-EVF-70 has 70Ah capacity and 6-EVF-80 has 80Ah capacity. 6-EVF-80 provides ~14% more runtime but is 2.4 kg heavier and slightly larger. Choose 6-EVF-70 if your vehicle has weight or space constraints, or daily range is 50-70 km. Choose 6-EVF-80 if you need 80-100 km daily range or have heavier loads.
Q6: How long does it take to charge 6-EVF-70?
A: Using a 3-stage smart charger with 14A charging current (0.20C₃), the 6-EVF-70 charges from 20% to 100% in approximately 6-8 hours. With a higher-rate charger (≤17.5A, 0.25C₃), charging time can be reduced to 5-6 hours. We do not recommend fast charging above 0.25C₃ as it shortens cycle life.
Q7: Does CHISEN provide OEM/ODM customization for 6-EVF-70?
A: Yes. CHISEN supports full OEM/ODM customization including logo silk-screen printing, laser marking, custom packaging (color box / neutral box / branded), Pantone color case customization, multilingual labels, and custom terminal types. Sample customization from 100 units; full customization from 500 units.
Q8: What export certifications are included with 6-EVF-70?
A: Standard export package includes MSDS, IMDG Class 8 / UN2794 sea freight certification, CE / RoHS / REACH / ISO 9001 / ISO 14001. Country-specific certifications (BIS for India, SASO for Saudi Arabia, SONCAP for Nigeria, etc.) available on request. Free Certificate of Origin and Fumigation Certificate included with shipment.
Expert Summary
The 6-EVF-70 12V 70Ah VRLA deep-cycle battery sits at the optimal mid-capacity sweet spot for commercial electric vehicle fleets worldwide. Its 350-600 cycle life, GB/T 32620.1-2016 compliance, 48V / 60V / 72V system flexibility, and CHISEN’s 20+ years of VRLA manufacturing expertise make it the most reliable choice for e-rickshaw distributors, sightseeing tour operators, e-tricycle assemblers, and floor-cleaning OEMs in 2026.
For B2B buyers, the 6-EVF-70 delivers the lowest total cost of ownership (TCO) over a 5-year operating horizon compared to flooded lead-acid (which requires labor and water maintenance) and lithium (which has 2-3x higher initial cost). The mature lead-recycling infrastructure (95%+ recycling rate globally) further reduces end-of-life burden.
For mission-critical applications (high-temperature operations, mountainous terrain, frequent hill climbs), the 6-EVF-70’s reinforced grid alloy and AGM / gel dual-technology design ensures stable capacity retention even at 45-50°C ambient temperatures and 3g+ vibration levels. CHISEN backs every 6-EVF-70 with a 2-year commercial warranty and 24/7 multilingual technical support.
When sourcing 6-EVF-70 for export distribution, prioritize manufacturers with direct factory supply (no distributor markup), complete export documentation, OEM/ODM flexibility, and proven references in your target market. CHISEN meets all four criteria and supplies 6-EVF-70 to 60+ countries with ready stock for immediate shipment.
Get a Quote for 6-EVF-70 Today
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