Might be dependent on the power being supplied to the plug, have you tried different sockets around the house? I had an issue where my bedroom plug wouldn't allow fast charging but most of the other...
All dive shops have them and to the standards you'd be used to, though they are a bit pricier than the stuff at markets (can't be haggled down). Stuff at markets can be a bit hit and miss too, so you...
I have a good pair of insoles that I can switch out with shoes, but I find Asics to be the best for me comfort wise, I had a pair of Nikes and felt like my shins were tearing off.