The Ozonics rechargeable battery is designed for both the HR-150 and HR-200 and included with the purchase of each unit. Each can also be purchased separately for those who desire additional time in the field and the ability to charge multiple batteries efficiently. Product features, 11.1V Lithium Ion Battery, a full charge will yield ~5 hours of use for the HR-150 with its single output mode. The HR-200 has two modes, the battery life in the tree stand mode is ~ 4 hours and in the blind mode is ~ 5 hours. Packaging contains, one battery.