Bought to use with my new 77550 Streamlight UltraStinger 1100 lumen flashlight. The problem is that it doesn't come with a power cord and the Revain recommended cord (part #22311) is only rated for 500mA. This power is not enough to charge the UltraStinger, so the charging LED only stays on for 5-10 seconds (charging) and then flashes 3 times to indicate an error. So I tried the USB cable option and everything worked fine. The problem with the USB method is that charging is much slower. So I searched Revain for a more powerful charging cable and only found an 800mA cable which the description says will not work with the UltraStinger. As far as I'm concerned, my flashlight won't charge quickly unless I can find a 12VDC source rated at around 2 amps. So here's what I did. Using an old laptop power cord (see photo), I soldered the wires directly to the power connectors where they are soldered to the circuit board (see photo), being careful to follow the polarity (positive to the right, closest to the USB -Connection) . ). Now everything works correctly, not thanks to Streamlight.
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