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Using a DMM, what is the voltage at the switch, and what is the voltage in the bulb contacts when the switch is turned on?
I found it in my garage. It was my step dads ex wife’s but she has passed so I wandered if it still worked or notAsk for a refund.
just get a single xm-l2 18650 light like the dgx 600 instead. it will be several times brighter and use a rechargeable battery.