LIPO Battery

What is the lifetime of a lipo battery 1100 mAH 3.7v ??? What is the charging time?

What is the load current when it is powering something? What is the charge rate? We can't tell with the info you provided.

Lifetime one hour if the current is 1100mA. In reality, probably less. Charging time one hour, if charged with 1C/h.