Features Extended Li-Polymer Battery Pack for Enfora Mini MT GPS--8 Times longer operation time than the original batteryCompatible with Pelican 1010 Micro Case Advantage of this extended Li-polymer battery pack design:Li-polymer 10,000mah high capacity battery pack10 - 60 days (optional) depends on usage, up to 20,000 readingsSpecial designed case to connect the battery to Mini MT:Protection board inside the case to fully protect the battery pack from over charging and over discharging Inbuilt DC connector for the chargerplug the charger to the DC connector on the case to charge the battery, battery do not need to be taken out.Gas Gauge function with LED indicator to show the battery capacity status. ( New function ).Li-ion Polymer 3.7V overnight charger Short circuit protection Charge Red, Full Green Finish charging process in about 10 hours (overnight)*Enfora Mini MT GPS and Pelican 1010 Micro Case are not included. *Enfora is the trademark of Enfora Ltd. Company. Mini MT is the trademark of Enfora. Ltd Company. *Pelican is the trademark of Pelican Products Company. *Tenergy is not associated with Enfora. Ltd. Company or Plican.