I think me 4s iPhone's battery is dead i think I can't use the on/off button it's jamed

Hi minichloe,

Based on the information you have provided, it seems your iPhone may need to be serviced. The following link should help you get started with the process and has links with additional information on topics such as warranty and service pricing, battery replacement, and express replacement service.

iPhone Repair and Service - Apple Support

Thank you for contributing to Apple Support Communities.

Take care,

Bobby_D