The Li-Ion battery on the Klein TI250 is not replaceable as far as I can tell. It will be e-waste within 3-5 years. Same with all the FLIR cameras that I came across. The few models with replaceable batteries at my price range were the Fluke VT02/VT04A (4xAA) and VT04 (an 18650 with a custom connector unfortunately). So I went with the Fluke, even though the FLIRs seemed to have better specs.