Fast Charging Lithium Batteries from Pale Blue. 1000+ Charge Cycles. Just plug any USB-C cable or use the included cable to charge four batteries at once. Pale Blue Batteries let you know when they are fully charged. No more batteries ruining expensive electronic devices! Included4 Pale Blue AAA Batteries 1 Charging Cable (USB to 4 USB-C) Chemistry: Lithium Ion Power: 900 mWh Voltage: 1.5V Capacity: 600 mAh Charge Time: 60 minutes (depending on charger specifications) Cycle Rating: 1000+ Cycles Charging Cable: 1 USB-A to 4 USB-C Charge State Indicator: Green LED Protection Circuit: Integrated safety circuit protects battery and deviceOverheat Protection: Operating at max output the battery will not overheat, this is part of the protection circuit. Other Safety Protections: Protects against Overload, Leakage, Short Circuit, Over Voltage, & High Temperature Certifications: IEC 62133, CE, FCC, PSE, UN38.3, RoHS, REACH Operating Temperature Rage: -20c -> 60c, (-4F-> 140F) Self-Discharge: T