Great point about the standby power. I use the lithium AA cells (primaries, not rechargeables) in the lights I keep in the car. They much more resistant to the heat in the summer and get changed out once a year. I unscrew the battery compartment in the light unless it has a mechanical switch. I was surprised by the high standby power in a few lights. Manufacturers are getting lazy / careless in the higherpower li-ion powered lights.