A recording tape cartridge which, with a structure having good produceability, can prevent wear of regions of abutment of a braking member and a releasing member at a time when a reel rotates. A current through the battery is integrated to determine a transfer of charge from the battery, and a value of total run-time that would be required to reduce the open circuit voltage of the battery to a predetermined lower limit is determined. A dielectric material liner is formed around the vertical stack, and is patterned to physically expose a top surface of the p-doped GaN portion.