The circuit board sets run about 3.4 V. The battery is wired to the back cover so it needs to come off. A very small electronics screwdriver will go in enough to tap it off.
The atty is in very tight. If you have a bad Tank atty/cone screw it on. Then it's just a matter of moving it back & forth w/ force. The cone/atty could be clamped or let the battery sit on a board w/ the cone/atty raised like by a piece of steel then tap the cone & rotate tapping.
If a 510 atty is usedthe atty tube will come off by hand so therefore something like vise grips would work.
If you screw a bolt into battery where the atty goes it might be best to have electrical tape inside to keep separated since if battery goes on bad direct short!
