Currently Being ModeratedJul 21, 2013 1:53 PM (in response to Herbie2627)
Can they charge from a computer's USB port? Have tried charging from another location, if this is all occurring at home it could be very dirty line power. Try another location and see if that helps.
Currently Being ModeratedJul 21, 2013 2:13 PM (in response to Herbie2627)
If it works fine with other devices, then it is not the wire, does not sound like the charger either since charging is not working with the computer. Sounds a lot like a bad run of iPhones/batteries.
Go to the Apple store genius bar and have the techs test the iPhone and it's battery to see if they are bad.