Power options will depend entirely on your kit, of course. If you have multiple pieces of equipment to power you may want to look into distribution panels and Powerpole plugs. Or you may just want to wind wire around the battery terminals if you have an all-in-one radio with a tuner included.

Here is a list of battery recommendations from OARC members - any of these would be more than suitable for SOTA use and will last for a good number of hours on top of a summit with a fairly average mobile radio.