Keysight N9923-90001 User’s Guide243Working with the Lithium-Ion BatteryCharging the BatteryUsing the External Battery Charger (N9910X–872)Figure 16-2 External Battery Charger (N9910X-872)The external battery charger (N9910X–872), lets you charge a fully depletedbattery in approximately three hours. It is a two bay, level–3 stand-alonebattery charger that is compliant with the standard Smart Battery System. Thetwo bays are charged sequentially on a first-come, first-served basis, though adischarge can be performed in the left bay while the right bay is charging.For more information, refer to the Instruction Manual included with theexternal battery charger.Read the safety information in “For the External Battery Charger(N9910X-872)” on page 251.External Battery Charger LED Charging StatusGreen Fully chargedGreen flashing Fast chargingYellow flashing Reconditioning – the accuracy of thebattery’s internal LED charge gaugeis being renewed. See“Reconditioning Battery” onpage 244Yellow/green Battery is reconditionedRed flashing ErrorYellow Standby
