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     Ni - MH AA rechareable battery    <br>          Model     UltraFire    <br>          Voltage     1.2v    <br>          Capacity     3500mAh    <br>          Charging Time     6 - 8hours    <br>          Charge Time     6 - 8hours    <br>          Rechargeable Times     About 1000 times    <br>          Weight     2.65oz / 75g    <br>          Battery Box Color     Yellow    <br>          Dimensions     5 x 1.4cm / 1.97" x 0.55" (L x Dia.)    <br>                                                             Package Includes                4 x UltraFire 3500mAh 1.2V Ni - MH AA Rechareable Battery + Battery Box Yellow<br>    1 x Battery Box<br>                                                            Extra Info            1. In case of danger， do not make it short-circuit distance or place it under high temperature<br>2. Avoid using Ni-MH batteries with ordinary dry-cell batteries<br>3. Do not use Ni-MH， Ni-Cd with different capacities and models<br>4. If you don&acute;t use the battery for a long time， please put it in a dry and cool place and make it full charged once every three months<br>