Be prepared to stay in touch when your original Sidekick 3 battery loses its charge. Danger PV-BL11 Standard Battery for Sidekick 3 from Sharp provides a backup power source and also give you the opportunity to increase talk time. Danger Sidekick designs and manufactures cell phone batteries to match the specific requirements of their phones, satisfying the most demanding customer. You can trust the high quality and performance of original Danger Sidekick cell phone batteries.