Have you ever thought about replacing the old battery for Gameboy Advance SP? And do you want to improve the performance of the game? If so， you are in the right. Here is a portable rechargeable battery with high capacity. It features extensively long working life and high efficiency， great for use. Except that， it has excellent ability of overcharge protection， easy and safe to use. High quality and stable performance create a better gaming experience. A very practical rechargeable battery， come to have a try!                                    Features             Battery Replacement For Gameboy Advance SP<br> Play over 18 hours on one charge<br> Charges in 4-5 hours time with charger<br> High capacity battery that lasts long time to use<br> Overcharge protection， it is safe to use <br>                                                            Specifications            Capacity    850 mAh    <br>Dimensions    (2.01 x 1.18 x 0.20) " / (5.1 x 3 x 0.5) cm (L x W x H)    <br>Weight    0.81 oz / 23 g    <br>Compatible with    for Gameboy Advance SP    <br>                                                            Package Includes            1 x 850mAh Replacement Battery for GBA SP