Product Name: Grepow 1254 66mAh Button Coin Cell Battery Model NO.: GRP1254 Nominal Voltage: 3.7V Type: Li-Polymer Battery Origin: China Product Description Button Cell Battery1)Dimension:diameter:12.1+0/-0.2 mm; thickness:5.0±0.15mm Shipment;Max 5.4mm Swelling2)Voltage: 3.7V3)Capacity: 66mAh4)Weight: 1.2±0.2g(Ref)5)Our shaped battery advantages:-High voltage (4.2V-4.45V)-High C rate that supports the fast charging and discharging(1-40C is supported)-Long cycle life (500 cycles, 1000 cycles)-Low temperature (-50°C is supported )-High temperature (85ºC is supported )-Quick Prototype Testing