A customer brought in her iPhone 3GS. She's had it from new and after the 24month contract wanted to use it on a sim free contract.
One problem, charging the battery every night for over two years had caused the battery to stop taking on any charge at all. Lithium-ion batteries as used in all modern mobile phones are guaranteed for around 500-750 charges. As batteries are always kept in stock, we had this phone turned around within a hour.
Above: iPhone 3GS 16GB that's stuck on the charging screen, it wont turn on and wont charge
The phone would not charge up to the magic 5% required for the phone to boot. Removing the front screen assembly, disconnecting the various FPC's and removing the main logic board reveals the battery.
With the battery removed, a replacement is fitted. With the phone reassembled and placed on charge, the phone boot up to the home screen. The customer was charged £30 and went away very happy.
Above: iPhone 3Gs with screen assembly and logic board removed, showing the battery.