We purchased a Durabrand Dual Screen Portable DVD player Model: PDV-722. The unit has been working but the internal battery quit charging and it will not stay on or run with the unit plugged into a wall outlet or the cigarette lighter in the vehicles. The unit is not suppose to require a battery to run and is suppose to run thru the AC/DC adapters. We cannot find a replacement battery and WalMart is no longer supporting the product, however, WalMart has them in their stores and is selling them. read full review »