Reset Craftsman v20 Battery in 3 Ways Without Charger

How to Reset a Craftsman 20V Battery If your Craftsman 20V battery shows charging issues, resetting it might solve the problem. Here are three methods to reset the battery: Using Another 20V Craftsman Battery: Connect B+ to B+ and B- to B-terminals between the healthy and problematic batteries for 15 seconds, then disconnect. Using an 18V–20V Battery From Another Brand: Perform the same jump-start reset with a compatible battery, like what I did using 20V dewalt battery. Using a DC Power Supply: Set a power supply to 20V/1A, and connect the positive and negative terminals properly to reset the battery.