In the end, because I was using it quite a bit yesterday I decided to recharge it just now. Down to about 10% after over 3 days (75 hours) which is not bad for a smartphone.
Impressive indeed, my 5c which is still new by my standards (2 years old) has never been able to survive more than about 6-12 hours real use, or maybe a day and a half in standby.
FWIW, my old iPad 2 seems to have settled into a state whereby battery drain in standby is truly negligible. Can't remember exactly what I changed but I can go away for the weekend, leaving it at (say) 70% charge. On return 3 or 4 days later, I press the home button, enter passcode, and it
still shows 70%. In use, it goes down as you would expect (a few hours would drain it) but in sleep, it seems pretty much unlimited.
As is well documented on these forums, iPad 2s are barely usable anymore, esp if they've been updated past iOS 7. All the same I reckon, a barely usable device, that stays equally unusable for many days on a single charge, still deserves some kind of credit.
Thanks also for feedback re repairer, it certainly sounds like you've got your real devices back - which is what I'd want.
