The last thing you need when shooting on location is to run out of battery. With a spare Profoto 4S1P B10-Series Battery, you will get plenty of extra runtime. Fully charged you'll get over 400 extra flashes on full power with the B10 or B10X and 200 full-power flashes with the B10 Plus or B10X Plus. The battery can be clicked on and off the flash in seconds and the charge level indicator makes it easy to check the charge level. The battery can be recharged quickly with the Profoto Battery Charger 3A and all our batteries are UN-certified so you can take them on a plane in hand luggage, no matter where you're traveling. It charges in less than 90 minutes with Battery Charger 3A, can be recharged from any charge level, and can also be charged while in use. This is a renewed product backed by a 90-day warranty.