3S 4S 5S 6S 7S 8S 21V 4.2v Li-ion Balancer 18650 Balncing Full Charge Battery Balance Function Protection Board

Description

Product Overview

Elevate your Li‑ion battery performance with the 3S 4S 5S 6S 7S 8S 21V 4.2V Li‑ion Balancer. Designed for 18650 cells, this high‑precision balancing and protection board ensures every cell stays perfectly matched, extending lifespan and boosting safety for your power packs.

Key Highlights

• Supports 3S to 8S configurations (up to 21 V) with a 4.2 V max charge per cell
• Full‑charge balancing function for optimal cell health and uniform voltage distribution
• Integrated over‑current, over‑voltage, and short‑circuit protection for reliable safety
• Compact, lightweight design – ideal for custom battery packs and DIY projects
• Easy-to-use LED status indicators for quick diagnostics
• Compatible with 18650 Li‑ion cells, widely used in RC, e‑bike, and portable electronics

Technical Specifications

Input Voltage: 3S–8S (7.2 V–21 V)
Cell Capacity: 18650 Li‑ion (up to 4.2 V per cell)
Balancing Method: Passive, 2‑wire or 4‑wire balancing (configurable)
Protection Features: Over‑current, over‑voltage, under‑voltage, short‑circuit, temperature monitoring
Dimensions: 30 mm × 20 mm × 5 mm (approx.)
Weight: 15 g

Why Choose This Balancer?

Unmatched reliability for high‑capacity battery packs. The board’s precise balancing algorithm keeps each cell within ±0.01 V of one another, preventing imbalance‑induced failures. With built‑in protection circuitry, you can charge and discharge confidently, knowing your pack is safeguarded against common Li‑ion hazards.

Ideal Applications

• RC cars, drones, and electric scooters
• Portable power banks and solar battery systems
• Custom electric bike or motorcycle battery packs
• Electronics hobbyist projects requiring stable 18650 packs

Installation & Usage

Simply connect the board between your battery cells and charger. The LED indicators provide real‑time status: green for balanced, amber for balancing in progress, and red for any fault conditions. Follow the included wiring diagram for a hassle‑free setup.

Order Now

Upgrade your battery management with the 3S‑8S 21V 4.2V Li‑ion Balancer and experience longer life, safer operation, and peak performance in every discharge cycle.