Wait, they have a battery that's worked for how long and they haven't taken it apart, I'm a kind old gentalman in New Zealand, we are covid free and willing to take the bastard apart and don't bloody care about 'of-wow-look-it-dont-work-now!' we just want to make 2 more.,(reply>), It's just a Pile Battery. They are resiliant, but don't hold much power at all.