DeWalt 20v Battery Reverse Polarity? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**truckster** · 02-03-2024, 09:34 PM

I've never seen this before... I bought some new 20v DeWalt batteries. One of them was DOA. I contacted DeWalt and they replaced it, so it's just been sitting around.

Today I disassemble the casing, thinking I might use the battery pack for a different project. I thought I'd see if I could charge it with my variable DC power supply. When I hooked it up (power off) I got a spark... I got out my multimeter and checked the voltage. I have 12.75 volts, but the positive and negative are reversed. Have any of you ever seen anything like this?

02-03-2024, 09:34 PM	#1
truckster Senior Member Join Date: Jan 2001 Location: Orem, Utah Posts: 7,953	DeWalt 20v Battery Reverse Polarity? I've never seen this before... I bought some new 20v DeWalt batteries. One of them was DOA. I contacted DeWalt and they replaced it, so it's just been sitting around. Today I disassemble the casing, thinking I might use the battery pack for a different project. I thought I'd see if I could charge it with my variable DC power supply. When I hooked it up (power off) I got a spark... I got out my multimeter and checked the voltage. I have 12.75 volts, but the positive and negative are reversed. Have any of you ever seen anything like this? __________________ I have sworn upon the altar of God, eternal hostility against every form of tyranny over the mind of man. - Thomas Jefferson



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