For folks who use words like "desolder" it's not tricky at all.
This (and the Dash) come in a glued shell with a 1.5v Energizer Li AAA solder-welded to the back. Getting inside without completely destroying the curb-appeal takes a hex bit, some scraping, and a little patience.
Once you get to the board, the battery is easily replaced with a LiPo. The MCU is 3.3v, but Amazon Prime has you covered on cheap LDO/buck converters (like, "a buck" converters).
This (and the Dash) come in a glued shell with a 1.5v Energizer Li AAA solder-welded to the back. Getting inside without completely destroying the curb-appeal takes a hex bit, some scraping, and a little patience.
Once you get to the board, the battery is easily replaced with a LiPo. The MCU is 3.3v, but Amazon Prime has you covered on cheap LDO/buck converters (like, "a buck" converters).