Product overview Simple, plug-and-play balancing board. Connect the battery and the board begins balancing automatically. A reserved position for sleep lines is provided for system integration. Key benefits Automatic balancing on connection: starts work immediately when the battery is connected, reducing manual setup and intervention. No external power required: uses the battery pack’s internal energy to redistribute charge, so no additional power supply is needed. Durable, efficient construction: built with original new Ultra Low Internal MOS and 2 oz copper thickness for improved conductivity and thermal performance. Clear troubleshooting behavior: indicator LEDs may briefly illuminate when cell voltages are very close; this is normal and the indicators will self-clear. How it works (function and performance) Capacitor-based balancing principle: the board transfers charge between cells using internal energy transfer within the pack. When connected, the balance card actively redistributes energy until cell voltages are balanced. Recommended cell voltage difference: for best results, ensure each cell’s voltage is within 0.5 V before connecting. If cell voltage differences are 0.1 V or less, LEDs can light briefly without active balancing current; the lights will go out automatically. If any indicator remains on, reconnect the balancing cable firmly to resolve the issue. Compatibility and materials Designed for multi-cell battery packs that require passive/capacitor-based balancing. Key materials and specs: original new Ultra Low Internal MOS for low internal resistance and thermal stability; 2 oz copper board thickness for better current capacity and heat dissipation. Includes a reserved position for sleep line connections to integrate with battery management or system power controls. Practical use scenarios Hobbyist RC and drone battery maintenance: maintain even cell voltages across multi-cell packs after charging or storage. DIY battery pack assembly and repair: use during pack formation and routine balancing without needing an external power source. Backup power systems and small renewable setups: keep multi-cell battery banks balanced during routine maintenance or after partial charging cycles. Notes and tips Verify cell voltages are reasonably close (within 0.5 V) before connecting for optimal balancing. Brief LED activity can occur when cell voltages are nearly equal; this does not indicate fault and will clear automatically. If LEDs do not clear, reconnect the cable to ensure good contact.