This Metabo battery went for a swim. Its at 20.5V. Cells at 4.1V. Charger wont accept it. Works in the drill. I hooked it up to a 21.5V external charger to see
m-voorloop.nl | Technique - Fixing a Metabo ASC 30 batterycharger
Metabo Cordless USB Power Adaptor PA 14.4-18 - Goodwins
DSN 50 (601568500) Air Staple Guns / Nailers | Metabo Power Tools