Thanks for the deailed review that includes dissection. They may be "pulse charging" if you want to look it up. I don't think that 1 Amp is too high for a AAA cell to handle if they are monitoring the peak. The earliest fancy Nimh charger from Astroflight that I owned recommended 1.2xCapacity charge rate to make the -DeltaV peak more detectable.
Don't you have an oscilloscope? ;) If not, these Zoyi scopes are the size of a large multimeter (and also works like one in that mode) and will do the job, although a real desk scope is obviously better.
hey my brotha, new sub for ya here n def. wanna talk more , only have email here though , would you happen to have any # 21700 batts ?, i e.d.c. a tactical flashlight n would love to get some spares via trade/swap/barter perhaps ?, thanks n great vid n talk soon > tom !