Pulsar APS 3.7V Power 2000 Pack 1 Rechargeable Li-Ion Batteries Battery Pack APS2/APS3 Are Designed To Be Used With Digital And Thermal riflescopes Pulsar (Thermion, Digex Etc.), monoculars Axion (APS3) And To Significantly Increase Their Self-contained operating Time. Nominal Voltage: 3.7V Rated Capacity mAh: 2000 Configuration: Power Pack Charge Time: 2 Hours Quantity: 1