Yeah at this point I don't even bother, just heat up the phone with a hair dryer until it's hot to touch and then rip out the battery, never got one out in anything else but a horribly bent condition. Pro tip: discharge the device to 0% before, so that if it's accidentally pierced during that delicate process it won't set everything on fire. If I ever need to do the same thing with a laptop, I'll try to get my hands on a barrel of sand just in case..