Can I use different ah batteries 3ah and 52ah on tbs 500 , ver 4.0.1 , suggest me the settings for learning hover
Surely you mean 5.2AH. Hover throttle will be automatically learned by flying in an assisted mode for 1 minute or so.
Assisted mode means ?
Do mean Every time I change my battery I have to wait for 1 min to learn hovering throttle by ardupilot?
Google “arducopter hover learning” and you will find this:
https://ardupilot.org/copter/docs/ac_throttlemid.html