We have inspected your handheld game units. There are problems with the internal batteries in the cartridges. This delicate repair requires the disassembly of the cartridge in addition to component level soldering and battery replacement into the electronics on the motherboard to repair the memory circuit. The total cost for repair, replacement battery, cleaning the cartridge and testing, with free return shipping is $42.95. That includes a 90 day warranty on the parts and repair. As an alternative we can simply return back your unit to you and the inspection fee and return shipping is $22.95. Please make payment below to proceed.