This battery has all the criteria required to maintain a quality that mimics the original. For all safety, the batteries are tested, certified and have the required international standards. PCM circuit board has a double protection for overcharging, discharge and short circuit. We at G-SP always offer a battery that meets the safety requirements to achieve a qualified and high-quality replacement battery. Technical Specifications Battery Type: Li-ion Battery cell Rating: A++ Capacity: 1624 mAh Volt: 3.82V Max Volt: 4.35V PCM Board: MCT Charge cycles: 550+ Charging time: 4 hours (Depending on charger) Standby Time: 4-7 Days Certificates: CE, RoHS, UL, IEC62133, PSE, TIS, MSDS and UN38.3 Safety: Dual IC Protection Material: Lithium-ion Compatible with: Apple iPhone SE Supplemental Protection Overcharge Protection Discharge Protection Short Circuit Protection NB G-SP is not responsible for damage caused during use or installation process. Fits: iPhone SE