The Soshine AA to size-C / R14 / UM-2 battery converter case is used to convert the AA to size-C / R14 / UM-2 battery. Just stick the AA battery in the converter and it's the same as a size-C / R14 / UM-2 battery. There is necessary to keep the perfect battery converter case close at hand、 at home、 at the office、 at the campsite、 etc´<br /><br />- Converts standard AA batteries into C batteries (aka R14、 UM-2)- Shipped in a 5-pack format (i.e. 5 converter cases per order)<br /> The Soshine AA to size-C / R14 / UM-2 battery converter case is used to convert the AA to size-C / R14 / UM-2 battery. Just stick the AA battery in the converter and it's the same as a size-C / R14 / UM-2 battery. There is necessary to keep the perfect battery converter case close at hand、 at home、 at the office、 at the campsite、 etc´<br /><br />- Converts standard AA batteries into C batteries (aka R14、 UM-2)- Shipped in a 5-pack format (i.e. 5 converter cases per order)                                                                                                                                Dimensions: 1.97 in x 0.98 in x 0.98 in<br />Weight: 0.42 oz