How? Really, how do you pry this damn thing open?
I cannot seem to get it done. Tried different coins, screw driver, Swiss knife, torch,… The plastic cover is deformed by now and let’s hope the o-ring is not broken anywhere.
Any tips? I’m about to retire it and just order a new one…
I’ve replaced them both. It can be a pain, but it definitely can be done. My first battery lasted almost a year and I was able to open them. A wide flat-head screwdriver helps.