18650 battery pairs 2 x 4 holder v6b

This is a battery holder for pairs of 18650 batteries. I use these to build up large battery packs from 18650 cells recovered from old laptop batteries.

More detail: http://www.myonlinediary.com/index.php/Main/Go-kartBatteryUpgrade

This thing was made with Tinkercad: https://www.tinkercad.com/things/4T4EVaMG8TZ