REPLACEMENT/SPARE LI-ION BATTERY PACK FOR LinkRunner AT Models LRAT-1000 and LRAT-2000 Only Reusability - Rechargeable Extra Battery Pack to help keep you on task Battery Capacity 18.5 Watt Hours Typical operating life is 6 hours; Typical charge time is 3 hours When you install the battery on your NetAlly tester, be sure the connector has been properly connected to your device Do not use a third-party charger to charge your tester; that could shorten the battery life