4S 6A Active Balancer Board – Capacitive Lithium Battery
4S 6A Active Balancer Board – Capacitive Lithium Battery
4S 6A Active Balancer Board – Capacitive Energy Transfer for Lithium Battery Packs
Keep your 4-cell lithium battery pack running at peak efficiency with this 4S 6A Active Balancer Board. Designed for use with NCM and LiFePO4 battery chemistries, this capacitive-type balancer actively transfers energy between cells to equalize voltage, extending the overall lifespan and maximizing usable capacity of your battery pack. Ideal for solar energy storage systems, DIY powerbanks, electric vehicles, and off-grid setups.
Made in Mainland China.
Key Features
- High-Current Active Balancing: Dynamic balancing current of 0–6A automatically adjusts based on the voltage differential between cells — the greater the imbalance, the higher the balancing current.
- Capacitive Energy Transfer: Uses capacitor-based topology for efficient, low-loss energy redistribution between cells — no wasted energy as heat.
- Wide Chemistry Compatibility: Supports both NCM (Li-ion) and LiFePO4 chemistries with an operating voltage range of 2.5–4.5V per cell.
- Ultra-Low Standby Power: Draws only 1.5mA–2.5mA during operation, making it ideal for always-on battery management applications.
- Compact Design: Measures just 45 × 36mm — easy to integrate into tight battery enclosures and custom BMS builds.
- Durable Construction: Plastic + metal construction ensures reliable performance in a variety of environments.
Specifications
| Configuration | 4S (4-cell series) |
| Balancing Current | 0–6A (dynamic, voltage-differential based) |
| Operating Voltage | 2.5–4.5V per cell |
| Compatible Chemistries | NCM (Li-ion), LiFePO4 |
| Standby Power Consumption | 1.5mA–2.5mA |
| Dimensions | 45 × 36mm |
| Material | Plastic + Metal |
| Package Contents | 1× Active Balancer Board |
Important Wiring Note
⚠️ Always double-check your wiring before powering up. Incorrect wiring can cause irreversible damage to the balancer board. The balancing current is influenced by both the voltage differential between cells and the length/resistance of your connecting wires — shorter, heavier-gauge wires will yield higher balancing currents.
Perfect For
- Solar energy storage battery packs
- DIY powerbanks and portable power stations
- Electric bicycle and scooter battery packs
- Off-grid and backup power systems
- Custom BMS (Battery Management System) builds
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Frequently Asked Questions
Q: What battery chemistries is the 4S 6A Active Balancer Board compatible with?
A: This active balancer board is compatible with both NCM (Lithium-Ion) and LiFePO4 (Lithium Iron Phosphate) battery chemistries, operating within a per-cell voltage range of 2.5–4.5V, making it versatile for a wide range of 4S lithium battery pack applications.
Q: How does capacitive active balancing work compared to passive balancing?
A: Capacitive active balancing transfers energy from higher-voltage cells to lower-voltage cells using capacitors as the energy transfer medium. Unlike passive balancing — which dissipates excess energy as heat — active balancing redistributes energy efficiently, reducing waste and improving overall pack performance and longevity.
Q: What is the maximum balancing current, and can I control it?
A: The balancer supports a dynamic balancing current of 0–6A. The current is not manually set — it automatically adjusts based on the voltage differential between cells. A larger voltage gap between cells results in a higher balancing current. Wire length and resistance also affect the achieved current.
Q: Can I use this balancer board without a separate BMS?
A: This board is a cell balancer, not a full Battery Management System (BMS). It handles cell voltage equalization only. For overcharge, over-discharge, and short-circuit protection, it should be used alongside a dedicated BMS module for a complete battery protection solution.
Production & Packaging Notice
To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.