The iPhone 4 power case features an ample capacity of 1,600mAh at 3.7V. It is manufactured with extensive protection functions for reliability. This piece also offers reliable protection against possible scratches and impact.

• Cell: lithium-ion polymer battery.
• Input: 5V/ 500mA.
• Output: 5V/ 500mA.
• Optional color.
• Smart LED displays protection, alarm and capacity.
• Manual shut-off function for high efficiency.
• Long standby time.
• Mature circuit with multiple protections: temperature, overcharge, overdischarge, overcurrent, short circuit, etc.
• Easy to use.
• Beautiful and slim shape.