Are you sure? Like electric toothbrushes then... or some MP3 players like in one of my cheapos which died a couple of years ago, but I found a cheapo compatible battery on ebay, and it's probably some mass market standard battery in that transformer too. I can't imagine they'd order a small and expensive run of a bespoke battery pack - it's easier and cheaper to source a battery made in the millions that will fit inside and do the job. Trouble is... if you cut it open to replace the battery with a compatible (if there is one), doing so likely reduces it's value as a collectable? On the other hand, it could contain a b*tch of a BMS.this is a transformer, with a batt you cant buy or remove