Our battery replacement service will replace your faulty battery with a brand new high quality battery that works perfectly. If your device won't turn on, has a "service battery" warning, is stuck in a boot loop, it's battery is draining more rapidly than in the past, is taking longer to charge, or the charge never reaches up to 100%, then you may need to get a battery change. ExpressService will ensure that the new battery is working correctly by running various tests before you collect your device.