Cordless Tool Won't Start? Step-by-Step Troubleshooter

Easy checks first. Then decide if it's the pack or the tool.

This follows How to Diagnose a Cordless Tool That Won't Start. Work through one question at a time. You can go back or start over whenever you like.

Safety: this troubleshooter is general information. Follow your battery and tool maker's instructions. Don't open a pack or a mains-powered charger, bypass a protection board or force-charge a rejected pack.

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