5S 18.5V 15A Li-ion 18650 Battery Protection Board – BMS PCM For Drill Battery Packs

Building or repairing a lithium battery pack for a power tool?

You're going to need a good BMS board.

This is a 5-series (5S) protection board designed for 18.5V Li-ion packs, like the ones that use 18650 cells.

It's rated for 15 amps, which is plenty for most drills and tools.

This little circuit board protects your batteries from over-charge, over-discharge, and short circuits—keeping them safe and making them last way longer.

It's a standard, no-frills PCM (Protection Circuit Module) that gets the job done.

If you're rebuilding a tool battery or making a custom pack, this is a key component.