1S 18650 3.7V BMS 15A 6MOS Protection Board

Keep your single-cell 18650 battery pack safe from common lithium failure modes with this 1S BMS Protection Board, built around the proven DW01+8205A protection IC and a 6-MOSFET switching architecture for reliable, low-resistance current handling. Designed for 3.7V single-cell Li-ion or LiPo packs, this compact board continuously monitors voltage and current, automatically disconnecting the battery the moment an unsafe condition is detected.

The board provides full-spectrum protection against overcharging, over-discharging, overcurrent, and short circuits, with precisely tuned detection thresholds that protect the cell without cutting off prematurely during normal use. Its 6-MOSFET design allows it to support up to 15A of continuous discharge current, making it a solid choice for higher-drain single-cell applications compared to lower-MOS-count boards rated for lighter loads. The compact PCB footprint makes it easy to integrate directly into a battery pack’s shrink-wrap enclosure without adding noticeable bulk.

This protection board is a go-to component for hobbyists and builders assembling custom 18650 battery packs for power banks, flashlights, vape mods, RC models, and other single-cell lithium-powered projects. It’s equally suitable for parallel-connected multi-cell 1S packs, as long as the combined discharge current stays within the board’s rated limit, giving you flexible protection whether you’re building a single-cell pack or a higher-capacity parallel configuration.

Specification:

• Configuration : 1S (Single Cell)
• Continuous Discharge Current : 12A
• Overcurrent Detection Current : 15A
• Charging Voltage : 4.2V
• Overcharge Detection Voltage : 4.25V ± 0.05V
• Overcharge Release Voltage : 4.23V ± 0.05V
• Over-Discharge Detection Voltage : 2.45V ± 0.1V
• IC Component : DW01 + 8205A
• Board Size : 35 x 7.4 x 2.2mm