Just got my Robin literally yesterday. Loving it. Battery life is 4.8 hours SOT with relatively clean standby. Brightness was at 10% due to personal preference. I don't expect much to change aside from capping at 4 hours SOT when the battery starts wearing down. Also I am not using the cellular radio so my battery figures could be a bit higher than normal. I can't say. What I can say is the community seems to be divided on whether the battery life is good. I would say I'm happily on the side that is relatively content with the performance of their device. If this is your first time with android you will be pretty happy (although I highly recommend switching launchers as the default one is not really representative of a normal android experience IMO. Otherwise it's a great first device.