The iPhone 4 and 4s models are an older model of iPhone, but can still be repaired by our expert technicians. Both phones feature a 1430 mAh battery capacity. Averaging 200 hours of battery life when in standby mode (when its left alone with no apps running). The 4 and 4s repair costs $40 dollars, and will take 10-20 minutes. No appointments required. Just walk in and we will be happy to help!