International LtdThe GP13AUP-2UE2 is a non-rechargeable alkaline battery manufactured by GP Batteries International Ltd. It has a voltage of 1.5 volts and is designated as a “D”-size battery (possibly for a flashlight or other small device). The battery has a designated part number of GP13AUP-2UE2 and a “Batt.no” of 2.