Ответ на "will not boot, despite charging all night"I have taken an old Casio charger 5vdc 2 amp and cut the wires and soldered it to a micro USB plug I used the white/red and a purple test it on an old device to make sure you have it right. I then started the high current charge and at first it looked good . After an hour it said 35% so I turned it on and it fell to 12% in a minute. I plugged it back in and checked for battery utilites, there was one battery pro that said it had 5 inactive cells and it then said it could fix them . Right now I have been using the tablet but software should not fix a battery and I think I will try to find a replacement on eBay. I do have an old old Pandigital and that battery still works good after 8 years.