Questions about Ti-58c power supply

[Doctor_Jacek]

Hi everyone,

Recently I bought a Ti-58c without AC adapter, battery pack needs to rebuild.

I have some questions to ask you:

a) Can I use the 5.0 V provided by USB to replace the AC Adapter?

b) Can I replace the BP1-A battery pack with a 3.7v Li-Po battery Or 3.6v Ni-Mh battery

c) Which is the most appropriate power for a new battery pack? 600mAh, 750mAh, 1300mAh or higher?

Thanks in advance for your response.