[Wiring tip]: Step 1: Transfer B-line; Step 2: The positive connection of the first cell is connected to the B+ pad of the protection board. Step 3: The positive connection of the first group of batteries is connected to the 4V pad of the protection board
[Compatibility]: Suitable for 18V Makita BL1830 BL1840 BL1850 LXT400 Power Tool Battery.
[Function]: Offering over charge protection, over discharge protection, short circuit protection, over current protection, reverse charge protection, over heat protection etc.
[Replacement]: Easy to repair the broken circuit board, can use many times will not broken until the battery cells dead.