Author: Eric Zhang | Position: Senior R&D Manager | Company: Phonix Power Technology Co., Ltd | WhatsApp: +86 191 2426 9133
If your e-bike uses a 3S 11.1V lithium-ion battery, the best charger is a 12.6V 4A smart Li-ion charger—it charges efficiently, keeps your battery safe, and ensures full capacity every time. Anything else either takes forever, risks damage, or shortens battery life.
Most e-bike batteries on the market are 3S packs with a nominal voltage of 11.1V, but fully charged they hit 12.6V. That’s why using a 12.6V charger isn’t just a suggestion—it’s required. Too low, and your battery never reaches full capacity; too high, and you risk heat, swelling, or permanent damage (Battery University).
Charging current matters just as much. A 1–2A charger works, but charging takes 6–8 hours for a 10Ah battery—painfully slow for daily riders. Above 6A? Cells heat up and degrade faster. 4A is the perfect balance: around 2.5–3 hours for a 10Ah pack, while keeping temperatures safe and extending battery life (Energy.gov confirms optimal charge rates improve longevity).
Smart chargers are a step ahead of basic ones. They automatically switch from pre-charge → constant current → constant voltage → cut-off, and monitor safety features like overvoltage, overcurrent, and reversed connection. Here’s a quick comparison:
| Feature | Smart Charger | Traditional Charger |
|---|---|---|
| Charging Mode | ✅ CC/CV with pre-charge | ❌ Fixed output |
| Overcharge Protection | ✅ Yes | ❌ No |
| Temperature Monitoring | ✅ Built-in sensors | ❌ None |
| Battery Life | ✅ Extends cycles | ❌ Shortens lifespan |
| LED Indicators | ✅ Double-color status LED | ❌ Basic or none |
| Safety Certifications | ✅ CE / FCC / TUV / PSE / CCC | ❌ Rarely certified |
Phonix FX1264000 12.6V 4A
Charger Technical Specs
| Item | Specification | Remark |
|---|---|---|
| Brand | FANGXIN® | — |
| Model | FX1264000 | — |
| Adaptor for | 3S 11.10V Li-ion Battery | — |
| AC Input | 100–240V, 50/60Hz | Input voltage range: 90–264V |
| DC Output | 12.6V ±0.2V, 4A ±10% | Max output power 50.4W |
| Charge Process | Pre-charge, CC, CV, Auto Cut-off | Pre-charge 0.4A ±0.1A, voltage ≤ 9V |
| Charger Indicator | Double-color LED | Red: power on; All flashing: error; etc. |
| Protections | OVP, OCP, Shorted, Reversed | Safety first |
| Approvals | CE, UL, TUV, FCC, PSE, CCC | — |
| Size / Weight | 113×44×30mm / 300g | Compact & portable |
| Applications | 3S Li-ion batteries, Security System, Lighting Industry | OEM customization available |
For full product details, check our 12.6V 4A Li-ion Charger Product Page.
This charger fits multiple users:
- OEM / ODM factories need consistent supply, logos, casing, packaging.
- Distributors care about compatibility with e-bikes, scooters, and mobility vehicles.
- End users want safety, certifications, and waterproof features (IP67).
All Phonix chargers are certified CE, FCC, and RoHS. For more on why certification matters, see Wikipedia CE marking.
At Phonix Power, we don’t just sell chargers—we engineer solutions. From waterproof e-bike chargers to OEM wheelchair and scooter models, our production line handles high-volume runs with strict QC and tailored designs.
If you want reliable e-bike charging solutions, Phonix provides certified, customizable products, a trustworthy factory, and technical support you can rely on.
