I'm about to replace the batteries of my UPS. For safety, I'd like to drain the old batteries completely before disposing, but I don't have a large 12v load at my disposal.
Can I wire it to a 220V incadescent bulb (a.k.a. a 'lamp') to drain it?
Yes. The current will be higher than at 230V (230, not 220) though, because the lower voltage won't heat the filament as much as the 230V would. And a less hot filament is a lower resistance (the filament is a PTC resistor).
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