Yes, I do. If you don't drain all the battery, the remaining power will be staying inside the battery. Once if you get it recharged, the battery itself will be destroyed & that's the reason why your battery can't last long & the level of battery will get lower even though you just recharged it.For a new battery, if you drain all the power & recharge. Its standby hours will be up to 200-350 hours & talk time will be 2-3.5 hours. If you refuse to drain the power & recharge it anyway, its standby hours will be decreasing from 200-350 hours up to 150-250 hours & talk time will be decreased to 1.5 hours.I'd advice you just stick on to SE's phones as their batteries are claimed to be the best batteries whereas Nokia, Motorola, LG, Samsung & others don't. Their appearance are good whereas the batteries don't, can't last long & Nokia's sound recording is crap as it has 1 min sound recording. Think about it, do you want to press 1 min sound recording each time if you chat with people?Regarding to the batteries, think about it. I know that it sounds very crazy & insane & a waste of time but it's true