Yeah, I have alkalines here, but they're in the store packaging. I'll use them when I need them but my lights/radios are without batteries unless in use. The batteries in those are NiMH and lithium primaries. Speaking of which, could I put one of the Batterisers around a 1.2 volt NiMH?

What happens if you put one around a lithium primary; will it bring the voltage down to 1.5 volts? My Garmin GPSMAP 60CSx can't handle lithium primary batteries, too many volts.