6-DZF-20 12V 20Ah Lead Acid Battery for E-Bike: Factory Specifications & Procurement Guide (2026)
For OEM e-bike packagers, electric scooter integrators, and replacement-battery distributors, the 6-DZF-20 is the single most-requested SKU in the lead acid family — and for good reason. It is the battery that powers roughly 38% of all exported electric two-wheelers from China, and its 12V 20Ah form factor is the universal standard that fits the vast majority of controller compartments built since 2018. This guide walks through CHISEN’s factory specifications, explains what each parameter means for your application, and shows you how to evaluate competing SKUs before placing a 20GP order.
Across 32,000+ Alibaba International Station buyers, “battery 12v 20ah” is the fastest-rising search term in the entire battery category this year — up 22.22% on search index. Within that trend, the 6-DZF-20 specification dominates because it is the most standardized form factor in global e-bike, e-scooter, and electric tricycle use. If you are a distributor, OEM packager, or importer, this is the SKU to lock down.
CHISEN 6-DZF-20: Factory Specifications
| Parameter | Specification |
|---|---|
| Model | 6-DZF-20 |
| Nominal Voltage | 12V |
| Rated Capacity (2hr) | 20Ah |
| Length | 180 mm |
| Width | 76 mm |
| Height | 170 mm |
| Total Height (with terminals) | 170 mm |
| Weight (Kg ±0.2) | 6.1 kg |
| Terminal Configuration | φ8.8-M5 |
| Cycle Life (50% DoD, 25°C) | ≥ 280 cycles |
| Float Voltage | 13.5–13.8V |
| Equalization Voltage | 14.4–14.8V |
| Self-Discharge (25°C, monthly) | ≤ 3% |
| Operating Temperature (discharge) | -20°C to +50°C |
| Operating Temperature (charge) | 0°C to +40°C |
These specifications are factory-tested at the C2 (2-hour) rate to 100% depth of discharge, with all dimensions measured at 25°C ambient temperature and the unit at full charge. The terminal configuration φ8.8-M5 indicates an 8.8mm insert terminal with an M5 bolt thread — this is the standard for the 6-DZF-20 form factor globally. If a competing supplier offers a 12V 20Ah with a different terminal (φ6.0-M4 or φ10-M6), it is either a non-standard variant or a different cell series entirely.
What Each Specification Means for Your Application
Rated Capacity at 2hr (20Ah). The 2-hour rate is the relevant discharge rate for electric two-wheeler applications because the typical discharge profile is 1–3 hours per ride, not the 20-hour rate used for solar storage sizing. A 6-DZF-20 at the C2 rate delivers 10 amps continuously for 2 hours before reaching 10.5V cutoff. In real-world e-bike terms, that is approximately 25–35 km of range per charge, depending on rider weight, terrain, and assist level.
Dimensions (180 × 76 × 170 mm). These dimensions fit the standard 6-DZF-20 battery tray used by Yadea, TAILG, Aima, Sunra, and roughly 80% of all Chinese e-bike OEM manufacturers. If you are packaging your own e-bike, the 180mm length defines the tray width; if you are replacing a battery in an existing vehicle, the 6-DZF-20 is a drop-in replacement for the OEM tray without any modification. Tolerance is ±2mm on all dimensions; CHISEN holds ±1mm in production.
Weight 6.1 kg. The 6.1 kg weight reflects the optimized plate count and AGM separator density that CHISEN uses. A cheaper 12V 20Ah with weight below 5.5 kg is a sign of plate count reduction — that is the supplier cutting cost where you cannot see it. A heavier 12V 20Ah at 6.5+ kg is either a higher-density industrial unit or an older flooded design. 6.1 kg is the sweet spot for the e-bike form factor.
Cycle Life ≥ 280 cycles at 50% DoD. This is the number that determines your warranty cost. At 280 cycles with daily 50% depth discharge, the battery delivers approximately 770 days of service — about 2.1 years for a daily commuter. Compared to a generic 12V 20Ah that delivers 110–150 cycles at the same DoD, you are looking at 1.8–2.5x the service life per battery. That is the warranty math your distributor network cares about.
Self-Discharge ≤ 3% per month. This matters for inventory and shipping. A 6-DZF-20 manufactured in CHISEN’s facility and shipped FOB Ningbo arrives at the customer’s warehouse with no more than 3% capacity loss in transit. A cheaper cell with 5% monthly self-discharge can arrive below 90% state of charge if the shipping leg takes 4+ weeks — and your customer perceives that as a defective battery on arrival.
Drop-In Replacement Compatibility: Which Brands Fit a 6-DZF-20
The 6-DZF-20 specification is so standardized that CHISEN’s unit is a direct drop-in replacement for the following OEM battery trays (with confirmed compatibility tests):
| OEM Brand | Battery Tray Model | Drop-In Compatible |
|---|---|---|
| Yadea (雅迪) | Yadea 6-DZF-20 standard | ✅ Confirmed |
| TAILG (台铃) | TAILG 6-DZF-20 standard | ✅ Confirmed |
| Aima (爱玛) | Aima 6-DZF-20 standard | ✅ Confirmed |
| Sunra (新日) | Sunra 6-DZF-20 standard | ✅ Confirmed |
| Luyuan (绿源) | Luyuan 6-DZF-20 standard | ✅ Confirmed |
| Ninebot / Segway-Ninebot | Ninebot 12V 20Ah pack | ✅ Confirmed |
| Generic Chinese OEM | Standard 180 × 76 × 170 mm tray | ✅ Confirmed |
If your e-bike brand uses a non-standard tray (typically due to a custom controller enclosure or a pack assembly with BMS), the 6-DZF-20 can still be used — but you will need a custom adapter plate. CHISEN can provide that adapter plate as part of a 5,000-unit OEM order.
How to Evaluate a 12V 20Ah Lead Acid Battery Before You Order 10,000 Units
Before placing any bulk order, run through this 8-point checklist with the supplier’s documentation. A serious manufacturer will answer all 8 within 24 hours.
1. C2 cycle test report to 50% depth of discharge, third-party lab stamped. Cycle claims without a test report are marketing copy.
2. Plate thickness measured by cross-section photo. Industrial-grade plates run 2.8–3.4 mm; anything under 2.4 mm is cost-cutting.
3. Grid alloy certificate from the smelter. Sb-Ca-Sn alloys with tin content above 0.8% resist corrosion better than pure calcium grids.
4. AGM separator manufacturer and country of origin. Imported AGM (Hollingsworth & Vose, Nippon Sheet Glass) costs 8–12% more and is worth it.
5. Self-discharge rate measured over 28 days at 25°C. Below 3% per month is industry standard; above 4% indicates internal micro-short circuits.
6. Vibration resistance test certificate. For e-bike primary pack duty, 4G over 2 hours on three axes is the minimum.
7. Terminal torque rating of the M5 bolt. Insert terminals should withstand 4–6 N·m without cracking.
8. CE / UL / IEC 60896-21 certification scope and validity dates. Confirm the certificate covers the 12V 20Ah SKU specifically, not just the parent product family.
A supplier who answers all 8 within 24 hours is a manufacturer. A supplier who takes 5 days or answers vaguely is a trading company reselling someone else’s rejects. The unit price gap between the two is usually under 8% — but the warranty cost gap is 200–400%.
CHISEN 6-DZF-20 Lead Time, MOQ, and Pricing
Standard 6-DZF-20 production orders run on a 15-day lead time for orders under 5,000 units and 25–30 days for full container loads. MOQ is 200 units for the standard SKU; custom branding (color, label, packaging) requires 1,000-unit MOQ and a 35-day lead time. FOB Ningbo pricing for the standard 6-DZF-20:
| Order Quantity | Unit Price (USD FOB) |
|---|---|
| 1,000 units | $11.20 |
| 5,000 units | $10.50 |
| 10,000 units | $9.90 |
| 20,000 units (40HQ) | $9.40 |
A 20GP container holds approximately 5,000 units; a 40HQ holds approximately 12,000 units. DDP terms are available for the United States, Germany, and the United Arab Emirates. For all other destinations, FOB Ningbo is standard with full CE / UL / IEC documentation prepared for customs clearance.
For OEM-branded orders (your brand on the box, your logo on the label), pricing is the same as the standard SKU above — the customization cost is in the one-time tooling fee, which we absorb into MOQ structure rather than per-unit pricing.
Frequently Asked Questions
What is the difference between 6-DZF-20 and 6-DMF-20?
The “DZF” designation indicates a deep-cycle flooded lead acid battery optimized for daily deep discharge cycling. The “DMF” designation is a sealed maintenance-free variant with similar capacity but different venting characteristics. For e-bike primary pack duty, both work; DZF is more common in OEM applications, DMF is more common in replacement markets where the customer wants zero maintenance.
Can I mix 6-DZF-20 batteries of different ages in the same pack?
No. Mixing batteries of different ages in a series string forces the older batteries into deeper discharge than they were designed for, accelerating their failure. Replace the entire pack at once, or replace only batteries that are within 3 months of manufacture date of the existing pack.
What is the warranty on CHISEN 6-DZF-20?
12 months from B/L date for manufacturing defects. Warranty does not cover improper charging, deep discharge below 10.5V, physical damage, or operation above 60°C ambient. Extended warranty terms (24 months) are available for OEM customers signing annual supply agreements.
Can CHISEN match my existing private-label artwork?
Yes. Send us your existing label artwork (PDF or AI), and we will replicate it within 7 business days for sample approval. For new artwork, our design team can produce 3 initial concepts within 5 business days at no charge for orders over 5,000 units.
What certifications does CHISEN hold for the 6-DZF-20?
CE (EN 60896-21), UL 1989, IEC 60896-21/22, ISO 9001:2015, ISO 14001:2015. Certificates are issued in CHISEN’s legal name and are valid for 3 years from issue date. We provide scan copies with every shipment and can arrange apostilled originals for customers who need them for government tenders.
Ready to evaluate CHISEN 6-DZF-20 for your e-bike program?
📧 Email: sales@chisen.cn
🌐 www.chisen.cn
📱 WhatsApp: +86 131 6622 6999
💬 Request a free sample unit for testing
