Hi my charger broke but i have found a similar charger with the same output connector, that i use for my Sony Ericcson BT headphones. Specs: Input: 100-240v, 50-60 hz, 150mA output: 5v, 550mA (original charger is 5v, 450mA) when i connect it says that is charges and when i leave it charging the battery is full after some hours. Can i still use this charger or am i ruining my phone and am i better of buying a replacement charger (5v, 450mA)? thanks!!!