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2S/3S/4S Lithium Battery Charger Boost Module C/A Type 7.4V–16.8V
2S/3S/4S Lithium Battery Charger Boost Module C/A Type 7.4V–16.8V
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2S / 3S / 4S Lithium Battery Charger Boost Module — USB-C / Type-A, 7.4V–16.8V
A compact lithium battery charger boost module supporting 2S (7.4V), 3S (11.1V), and 4S (16.8V) Li-ion and LiPo battery pack charging via USB-C or USB Type-A input. The boost converter steps up the 5V USB input voltage to the required charging voltage for the selected cell count, providing constant current / constant voltage (CC/CV) charging with cell balancing for safe multi-cell LiPo and Li-ion battery pack charging from a standard USB power source.
Technical Specifications
| Parameter | Value |
|---|---|
| Input | USB-C and/or USB Type-A (5V) |
| Output Voltage | 7.4V (2S) / 11.1V (3S) / 16.8V (4S) — selectable |
| Charging Mode | CC/CV (constant current / constant voltage) |
| Cell Balancing | Yes (per-cell balance charging) |
| Compatible Batteries | Li-ion, LiPo (2S, 3S, 4S packs) |
| Charge Termination | 4.2V per cell (standard Li-ion/LiPo) |
| Protection | Overcharge, over-current, short circuit |
| Indicator | LED charging status indicator |
| Certification | RoHS |
Cell Count Reference
| Cell Count | Nominal Voltage | Full Charge Voltage | Application |
|---|---|---|---|
| 2S | 7.4V | 8.4V | RC cars, small drones, power tools |
| 3S | 11.1V | 12.6V | FPV drones, RC aircraft, e-bikes |
| 4S | 14.8V | 16.8V | High-power FPV, RC boats, power tools |
Typical Applications
- RC Battery Charging: Charge 2S/3S/4S LiPo battery packs for RC cars, FPV drones, and RC aircraft from a USB power bank or USB charger
- DIY Power Bank: Build a multi-cell Li-ion power bank with USB-C charging input and balanced cell charging
- E-Bike Battery: Charge small 3S/4S Li-ion e-bike battery packs from a USB-C power source for emergency top-up charging
- Portable Power Supply: Build a portable 12V or 16.8V power supply from a 3S/4S LiPo pack with USB-C charging capability
FAQ
Q: Can I charge a 3S LiPo with a standard 5V USB charger?
A: Yes. This module boosts the 5V USB input to the required 12.6V (3S full charge) charging voltage. Charging current will be limited by the USB power source output current and the module’s boost converter efficiency.
Q: Does this module balance individual cells?
A: Yes. The module includes per-cell balance charging to ensure all cells in the pack reach the same voltage (4.2V per cell) at the end of the charge cycle, preventing cell imbalance and extending battery life.
Package Contents
- 1 × 2S/3S/4S LiPo charger boost module (USB-C / Type-A input)
