Hi I'm experiencing some weird behaviour on my SG2 - related to the battery. Yesterday, the phone crashed and locked into a screen showing the battery and a flashing thermometer warning. The battery wasn't overheated - in fact it wasn't even warm. The only way I could 'unlock' the phone was by connecting it to charger. However, once it's fully charged - the 100% charge icon in the notifications bar doesn't go away. If I power off - I get the same locked warning screen. Any ideas? It sounds like the battery is shot, doesn't it? I should maybe get it replaced as it's still under warranty. Thanks for any useful feedback.