12.6V 2A Li-Ion Charger – For 10.8V 3S BMS Battery Packs, Fast and Safe
Has your power tool battery died in the middle of a project? Or perhaps you have a custom DIY Li-Ion pack that needs a dedicated, reliable power source rather than a makeshift solution? This 12.6V 2A Li-Ion charger is engineered specifically for these tasks—delivering the precise current required, cutting off automatically, and providing clear status updates so you know exactly when you’re ready to go.
Note: Exclusively compatible with 10.8V 3S Li-Ion battery packs equipped with a BMS (Battery Management System). Not suitable for LiPo, NiMH, or NiCd batteries. Please verify your battery chemistry and nominal voltage before connecting.
Why choose this model? (Key Advantages):
- CC/CV Charging Profile — Constant current during the initial phase and constant voltage at the end: exactly what Li-Ion cells need for maximum longevity.
- 2A Output — Charges a standard 3S pack in approximately 1–2 hours without stressing the cells.
- Universal 110–240V AC Input — Works worldwide without the need for a voltage converter.
- Dual-Colour LED Indicator — Red while charging, green when finished: no guesswork involved.
- Standard 5.5×2.1mm DC Jack — The industry standard for consumer electronics and DIY projects, ensuring a direct fit without adapters.
- 1-Metre Cable — Provides enough reach so you aren’t tethered directly to the wall socket while working.
- Works in Tandem with 3S BMS — Designed to work with your battery’s protection circuit to automatically stop charging at 12.6V, preventing overcharging.
Performance and Specifications
The fixed 12.6V DC output voltage matches the peak voltage of a 3-cell Li-Ion series (3S) pack perfectly. The CC/CV profile ensures the charger begins with a steady 2A current, then gradually tapers off as the voltage nears the limit, which is essential for maintaining the health of your lithium-ion cells. The 5.5×2.1mm DC jack is the de facto standard for low-voltage devices, making it compatible with the vast majority of DIY electronics and power tool battery packs right out of the box.
| Parameter | Detail |
|---|---|
| Input Voltage | 110–240V AC, 50/60Hz |
| Output Voltage | 12.6V DC |
| Max Output Current | 2A |
| Battery Compatibility | 10.8V Li-Ion (3S) with BMS |
| Charging Profile | CC/CV (Constant Current / Constant Voltage) |
| Output Connector | 5.5×2.1mm DC Jack |
| LED Status Indicator | Red – Charging / Green – Fully Charged |
| Cable Length | 1 m |
| Recommended Applications | Power tools, RC aircraft, RC cars, DIY Li-Ion packs |
Package Contents
- 1 × 12.6V 2A Li-Ion Charger with 5.5×2.1mm DC Jack
Frequently Asked Questions
Is this compatible with any 10.8V battery?
It is only compatible with 10.8V 3S Li-Ion batteries equipped with a BMS circuit. LiPo, NiMH, or NiCd batteries are not compatible, even if the nominal voltage appears similar. Always check your battery chemistry before connecting.
How do I know when charging is complete?
The LED will change from red to green once the battery reaches 12.6V and the BMS cuts off the current. There is no need to time the process manually.
Can I use this abroad?
Yes. The 110–240V AC input covers virtually every electrical grid in the world. You may only need a physical plug adapter if the wall socket shape differs from your local standard.
Do I need to stay nearby while it charges?
The battery’s BMS will automatically stop the power flow at full charge. However, as with all lithium-ion batteries, it is standard safety practice not to leave charging unattended for extended periods.
What happens if my battery does not have a BMS?
Without a BMS, there is no mechanism to stop the charging process at the correct voltage. In this case, do not use this charger, as you risk overcharging the cells. This model is specifically designed to work in conjunction with a battery protection circuit.
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