OK this is really weird to me but my battery keeps up for 4-6 hours only on a medium usage and ends up for me at 5-15%. I'm running on .353 and the applications I use so far is BBM, Whatsapp, phone, SMS and a bit of browsing. I'm not really happy with the battery for the 9900 as my 9780 and Torch lasts for me for like forever. Could this be a problem with the OS or something? Do I need to downgrade to .303 or just wait for the next release?