I'm having some trouble with my battery mainly at work. My phone doesn't get great service at work and it's constantly searching for signal and draining my battery. I have to turn on airplane mode way too much just to save battery. Unfortunately I need to have my phone on for obvious reasons and can't always afford to use airplane mode. I start work at 6 and end at 2:30...sometimes after a shift of not even using it the battery is already below 50%. That's with turning airplane mode on sometimes. That's not good at all. Does anybody know of a better battery to buy that still has nfc and won't force me to buy an extended battery door? I like how slim the phone is and I don't really want to get a bulky door, and plus I already have a case for my phone and I'd hate to not be able to use it. If anybody has any info for me I'd be very thankful!