Cow-horn GMB451028-3.7V-80mAh

2. Description
2.1 Model: 481028
3. Specification
3.1 The fundamental parameters of the cell
1, Charge Voltage 4.2V
2, Nominal Voltage 3.7V  The average value of voltage during the discharge period (with standard charge and discharge).
When shipping, the voltage without load is between 3.6V and 3.85V.
3 ,Nominal Capacity
       Typ:80mAh@ 0.2C Discharge
       Min:80mAh
Nominal Capacity refer to the capacity of 0.2C discharge to 2.8V cut-off voltage, after charging with standard method.
4 ,Charge Current
Cell surface Temperature Charge Current
<0ºC                                   Charge shall be prohibited
0ºC~10ºC                            0.1CMax(CV:4.1V Max)
10ºC~15ºC                          0.2C Max
15ºC~25ºC                          0.5C Max
25ºC~45ºC                          1.0C Max
5, Standard Charging method CC/CV 0.2C CC(constant current) charge to 4.2V, thenCV(constant voltage 4.2V) charge till charge current decline to ≤ 0.05C
6 ,Cycle Life   not less than  300 Times
One cycle refer to one charge period and then one discharge period.
Test condition:
Charge:0.2C to 4.2V
Discharge: 0.2C to 2.8V
The cycle life is the cycle times when the discharge capacity is about 75% of the rated capacity.
7, Initial
Impedance  not less than 400mΩ     Internal resistance measured at AC 1KHz  after50% charge

8, Max. Discharge Current  1.0C
9 ,Discharge Cut-off Voltage 2.8V
10, Operating Temperature
Discharge: -10℃~ +60℃
Charge: 0℃~ +45℃
11, long term storage
temperature   -5 ℃~+35℃
Relative humidity: 45~75%RH
Voltage:3.8 plus and minus 0.1V
Cells must be stored at 3.6V ~ 3.85V. Over long storage periods cells should be cycled every 90 days. The method is to do a
charge-discharge cycle with standard method, then charge to 3.6V ~ 3.85V.
12 ,Cell Weight Approx:0.9g
13 ,Assemblage Dimension
Length:28.91&33.71mm Max
Width:10.2mm  Max
Thickness:4.8mm Max
Measured weight of 300gf at 25℃ minus and plus  1℃.Not including battery drawing line.