Pulsar APS3 Battery PackMiniature power elements used in Axion and Thermion models provide sufficient operation time and can be quickly replaced.B-Pack mini batteries can be quickly charged either with included charger station or in the unit connected to USB.Approx Charge Time - 2.5hrsApprox Run Time - upto 4hrsSpecifications Outage Voltage: 3.6v Battery Type: Li-Ion Capacity: 3200 mAh Related Products: Axion and Thermion models Dimensions: 74x24x24mm Weight: 6g N.B. It is recommended that on the fisrt few uses of the APS3 Battery Pack you do a 'deep charge cycle' (i.e. leave it on charge even if the battery indicates it's full) and then discharge fully before recharging again. This is considered best practice whenever using rechargeable batteries as it will ensure you get better performance and a longer life out of the battery.