BMS 1S 3A 3.7V (4.2V) Li-ion Protection Board

The BMS 1S 3A protection board is designed for charging and discharging control of a single lithium-ion battery cell. It provides reliable protection against overcharge, over-discharge, short circuit, and overcurrent conditions, helping to extend battery life and improve safety.

Featuring compact dimensions, low power consumption, and stable performance, this module is ideal for battery-powered devices, portable electronics, LED products, and DIY projects.

Compatible with 18650, Li-Ion, and Li-Polymer batteries with a nominal voltage of 3.7V and a full charge voltage of 4.2V.

Features:

• Designed for 1S lithium battery packs
• Overcharge protection
• Over-discharge protection
• Short-circuit protection
• Overcurrent protection
• Low standby current consumption
• Compact design

Specifications:

• Type: BMS protection board
• Battery configuration: 1S
• Nominal voltage: 3.7V
• Maximum charge voltage: 4.2V
• Nominal discharge current: 3A
• Overcurrent protection: 2.8 ± 0.3A
• Overcharge detection voltage: 4.275 ± 0.025V
• Overcharge release voltage: 4.075 ± 0.025V
• Over-discharge detection voltage: 2.50 ± 0.1V
• Over-discharge release voltage: 2.90 ± 0.1V
• Internal resistance: < 50 mΩ
• Compatible battery types: Li-Ion, Li-Polymer, 18650