SUPEREX 2pcs 650mAh 9v Lithium-ion Rechargeable Batteries + 9volt Li-ion/Ni-MH smart Battery Charger Package: 2 pcs rechargeable 9V Lithium rechargeable battery and a smart battery charger. Charging for 1-2PCS Ni-MH or Li-ion 9V Battery.Charger's output:8.4V-9.8V; Polarity detection Can mix charge 9V Ni-MH or Li-ion Battery, 2 LED displays. Auto alert indication for worse battery and bad battery Includes 2 PICS 9V (voltage range: 7.4V-8.4V) 650mAh Li-ion Rechargeable Batteries, power supply for Microphones, Multimeter, Remote Controls and others Power-hungry Equipments.