HARBOR FREIGHT 38391
(Chicago Electric Power Tools)
Bought ~10 years ago, maybe more, used it successfully once, left it plugged in to AC to charge, a year or so later its own meter showed voltage just barely in the green. Kind of forgot about it, left it plugged in to AC, this thread reminded me, retrieved it, voltage on the battery clamps today is only 9.6, the rest of it (lamp, meter) seems dead. Re-reading the instructions to see how I sinned.
Several years ago I bought a used, reconditioned battery I kept (covered) on the balcony, recharged it periodically from a Sears battery charger, but it turned up dead this year when I needed it.
Turned it in for another reconditioned battery for $45 at
Rocky Mountain Battery
7975 W 44th Ave Wheat Ridge CO 80033 (720) 388-8396
(Excellent fast service ! Their website seems to be down today, Thanksgiving Day.)
I'm keeping that one in the car, doping out a method to keep it trickled from the cigarette lighter jack in the back of my blessed and beloved Subaru without popping the cig lighter fuse. I figure a hefty diode and a 100 ohm 5W resistor ought to cover all the bases safety-wise right down to a short circuit, such as a 100% dead battery.
I also use that plug to run my little tire inflation compressor.l
Terry