Do you want the economical and greener lifestyles? Maybe you should start from minor matter， and just like use the rechargeable batteries. Rechargeable batteries adopt universal standards， most of them suitable for cameras， toys and many other electronic devices. Except that， it features extensively long working life and high efficiency， great for use. And it is compact and rechargeable， so you can carry it anywhere anytime， convenient to use. The number of charge cycles is about 1000 times， durable and reliable!                                    Features                New battery<br>    High quality and durable<br>    Provides excellent continuous power sources to your device<br>    High energy density， long life battery<br>    This battery has an extra long life for all your battery powered devices<br>                                                            Specifications                        Battery Type     16340 battery    <br>          Voltage     3.7v    <br>          Capacity     880mAh    <br>          Charge Time     About 6~8hours    <br>          Rechargeable Times     About 1000    <br>          Material     Lithium Battery    <br>          Weight     1.31oz / 37g    <br>          Dimensions     3.5 x 1.4 cm / 1.38" x 0.55" (L x Dia.)    <br>                                                             Package Includes                1 x 2pcs TrustFire 3.7V 880mAh 16340 Lithium Rechargeable Batteries<br>