MiFi battery

Hello does anyone know who make and model the MiFi battery? Is there any datasheets provided with the battery?

can you tell me the purpose?

We wanting to know the voltage, maximum charge cycle and quality of the battery and the brand.

 

This is Li-Pol batteries. Same as the current battery used on the market, normal voltage is 3.7V and max voltage is 4.2V. Charge cycle is 300 times. This is our OEM version.