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Hart 20V Power Tools Battery Interface

20 volt input with the slim terminal as Positive + (wire is even red) it's also labeled as such on the board inside. The Diode array appears to be 94 volts (LJ-1 94v-0) with my power supply I started at 20 volts with all functions operating as advertised. I then throttled back down to 12 volts and below where I began to observe some dimming of the lights output. At 17.5 volts we get a triple flash but maintain full performance even below 15 volts. It does operate in the 12-15 volt range but I can not attest to any possible adverse which may come along with its use at those voltages for any extended period of time. -Note- it does require a minimum of 16.1 volts to start operating again once power has been disconnected. This is good new for me as it will serve as a utility light on our golf cart whose batteries are 8 volts each. I Scored 4 of these units recently at my local Walmart 39180 they were on clearance for $5.00 each. I sold 3 and kept one whose box was previously opened. I have no Hart batteries currently nore do I plan on acquiring any in the future. So this was the perfect unit to do some testing and full disassembly on. Any question you may have, I'll be happy to entertain but my knowledge is limited so we may can learn together. I can supply some photos if requested. Thanks for the meeting place provided for us here today! Rick D.

Rick Dunaway
Sat, 29 Apr 2023 00:47:11 -0700

Thanks for the technical details, Rick. Will definitely be helpful with jury-rigging these batteries for other purposes.

Sun, 30 Apr 2023 17:44:10 -0700

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