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. The PCM circuit board has a double protection for overcharging, discharging 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: 3110 mAh Voltage: 3.82V Max Voltage: 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: Double IC Protection Material: Lithium-ion Compatible with: compatible with Apple compatible with iPhone 11 Supplementary Protection Overcharge Protection Discharge Protection Short Circuit Protection NOTE! G-SP is not responsible for any damage caused during the use or installation process.