Batteries in smartphones work like any other battery - they wear out with time. After about 6 months usage, a decrease in battery life by 10-20% is usual. The iPhone 4S Battery Replacement is a perfect replacement for your iPhone 4S battery.
Features: • Proven safe for iPhone 4S. • Lithium-Ion chemistry prevents the battery from overcharging and possible quick discharges. • This product had undergone numerous tests to ensure the quality and durability.