can you help me with getting li-ion battery library for proteus?

Hello there!

Thanks for reaching out. To help you further, could you please tell us if you need a CAD model or a simulation model?

I need a simulation model.

Unfortunately, we don't have the simulation model for that component. From my experience, you only need the battery model to check the behavior of the battery under certain conditions, but if you just want to feed your circuit with a 3.7V source, you can use an ideal DC source. It could give you an idea of the main performance of your circuit.

Please let us know if you need anything else. We're happy to help!