5S 18A 18.5V 21V Lithium Battery BMS Protection PCB Board For Drill Battery Packs
About this item
Building your own 18.5V or 21V lithium battery pack for a power tool or project?
You're going to need a good BMS to keep those cells safe.
This is a 5S (5 cells in series) protection PCB board rated for 18A.
It's designed specifically for lithium-ion batteries, making sure you don't over-discharge, over-charge, or short-circuit your pack.
It's a brand new board, made in China, and it's the standard go-to for DIY drill battery rebuilds.
The model is just called '5S Battery Protection Board', so it's pretty straightforward.
It doesn't have a fancy brand name, but it's the exact component you need to make your homemade battery pack safe and reliable.
If you're comfortable with a spot welder and some wiring, this little board is the brain that'll protect your investment.
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