stack section spacer for OP 21700 stack set up. This spacer compensates for battery defects, including recessed positive posts. With this disk you can get a solid connection even with B and C bin 30T batteries.
stack section spacer for OP 21700 stack set up. This spacer compensates for battery defects, including recessed positive posts. With this disk you can get a solid connection even with B and C bin 30T batteries.
Works great for any batteries with a flat positive pin
Fits great
