Battery is an indispensable power source for a cell phone. Therefore， if the battery runs out of power quickly， it really casts a damp over our phone usage. However， keeping an extra battery enables you to enjoy endless pleasure with your cellphone and this Battery would be your best choice. The battery bears the properties of high capacity and dependable performance. It is durable， reliable and lightweight to carry， so it is worthy of your ordering. It is compatible with AK09 Watch Phone.                                    Features                All batteries have been tested before shipment<br>    Stay connected with your family and friends by getting extra battery power today<br>    This replacement battery has an integrated microchip that prevents overcharging and lengthens battery life<br>    Best replacement for the battery with comparable standby and talk time<br>    350mAh Extra High Capacity， extra - long stand - by times<br>    Compatible with AK09 Watch Phone Battery and charger<br>    Light Weight， High Capacity & Low Impedance<br>    Our battery is sent out with little or no power， so please charge it for hours before using<br>                                                            Specifications                        Dimensions     3.6 x 3.5 x 0.4 cm / 1.42" x 1.38" x 0.16" (L x W x H)    <br>          Standard Voltage     3.7V    <br>          Charging Voltage     4.2V    <br>          Capacity     350mAh    <br>          Weight     10 g / 0.35 oz    <br>          Compatible with     AK09 Watch Phone    <br>                                                             Package Includes                1 x 350mAh Battery for AK09 Watch Phone<br>