i spent so much buying rechargeable batteries for my player (4 pcs size AA). i cannot wait charging the batteries especially when i am on the go. i want a portable battery pack which i can take along when i go out. my player requires only 9v. playing video at long hours easily consumes the charge that's why i am looking for a battery pack which lasts longer.
Battery packs are usually built in but an adapter to work on 120vac or 12vdc just plug in. You can DIY a battery pack to work at the adapter plug in.
