5S 20A Li-ion Lithium Battery Protection Board PCB W/ Balance – For 18650 Battery Pack

Building your own 18650 battery pack?

Don't skip the brain—grab this 5S 20A BMS protection board with built-in balance.

It's designed for 5-series Li-ion packs (like 18V tool batteries or small EV projects) and keeps everything safe from overcharge, over-discharge, and short circuits.

The balancing function makes sure all your cells age evenly, so you get max life out of your pack.

Compact design, easy to wire up if you've got basic soldering skills.

Whether you're recycling laptop cells or building a custom power wall, this little board is the affordable safety net your project needs.

Brand new, ready to go.