comments:
MakerKevJ posted on r/ipod2w
my 6th gen needed the thick back for the 3800mAh even with the physically smallest drive I could find. its definitely over 3000mAh. I wouldn't trust a 3800 that's thinner. that's not how lithium batteries work. you can't just magically get more capacity with less material.Been using this one almost a year and I have no complaints other than how long old USB devices take to charge modern LiPo batteries XDAmazon.com: MCMConcepts 3800mAh Battery Replacement for iPod Classic/Video Thick : Electronics