Model Number: Vision spinner 1100mah Key Specifications/Special Features: Expend Voltage from 3.3v - 4.2v to 3.3 V - 4.8VSafety Cut off Protection: Can be locked when press the button for 8 seconds this design can make a long life for the battery.Low Voltage Protection: turn off automatically when voltage is lower than 3.3v .Short Circuit Protection:When short cut happens ,will shut down safetlyDood quality and fast shippingDetails here for this new productName Vision spinner batteryPackaging Gift boxColor green, silver , purple, pink, black, red, blueLength 95mm -112mmWeight 30-35gCapacity 650mah -1300mahOperating Voltage 3.3V-4.8VCharge Time 3.5-4 hoursBattery Life can be charged more than 300 times