12V Lithium Iron (LiFePo4)

Thanks! I may look into this deeper. I have a pretty good emergency jump start battery pack with two lighter outlets that I sometimes use for astronomy... running my go-to mount, dew heater, etc. I've replaced the battery in it once a few years back (got lucky on both price and amp-hrs). But less weight is more better ;).

I'll have to investigate whether the original wall wart charger will work with this chemistry, as well if there's a battery that fits in the plastic case.

Jim, "Mo' coffee!"