u/VirtualRock2281

I ordered a refurbished MP02 and the battery life is...terrible. Airplane mode draining ~20% per hour unused. I'm savvy with a soldering iron, how can I replace the battery on this thing? I want to make the switch full time but if the phone can't last a day and I need to carry around a charger pack this isn't gonna do it for me...

I would have bought a new one but they aren't available.