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Hi, can i installe iPhone 5S battery on iPhone 5C ? No Risk on long term ? Sorry for my english

@yorane the connectors are the same but the batteries are not. The 5S has higher mAh and these are smart batteries and “communicate” with your iPhone. There are plenty of cases that report that the swap of the batteries can cause reboots, and can cause problems on bootup. Stick with the right battery to avoid any issues after.