For use with the spypoint flex only. Extend the battery life of the Spypoint Flex with the Rechargeable Lithium Battery. The 7.4 Volts and 5.4 amp-hours battery slides in easily once the standard battery tray has been removed. Simply remove the flex battery tray and install the lit-22 instead to extend the time between camera visits. The lit-22 is the perfect accessory for the spypoint flex if you want to get even more time between camera visits.