iPod Classic Back Cover Replacement Kits & Services
Amazon.com: Custom 1TB SSD with 3000mAh Battery Upgraded Compatible for iPod Classic 7th Generation 1TB (RED) : Electronics
iPod Classic new Battery & 256GB SD Card: still works in 2022! - YouTube
3rd party extended Battery guide – iFlash.xyz
Modding an iPod Classic - 1 TB and bigger battery
iPod Classic 5th Gen Battery Replacement | iMaster Repair
iPod classic 160gb modded to 256gb with 2000mah battery and Bluetooth. Just waiting on a 3d printed back. All fits within a thin shell. Very happy with how it's come up. :