Hi guys haven't been on team iPhone since 2011, so I'm trying to play a catch up. I recently was given an iPhone 5, and its got high mileage on it's battery. Now I've restored it to factory, and threw on the 8.1.2 jailbreak, and the battery is pretty sub-par, and barely lasting half a day. Now I'm wondering if putting in a new battery will give it more longer life or is this just how long it lasts? Where is the best place to buy a new battery? iFixit, Newegg, or??? I'm more than comfortable working on my phone too.