On Monday, October 12, 2020 at 10:10:18 PM UTC-4, wrote:

What kind of power capacity are folks using?

Most popular are lithium iron phosphate (LFP) batteries in same form factor as those old 6AH SLAs, now typically with 9 - 10 AH capacity. Decent quality examples last for years and years with little change in capacity... and your radio still transmits
from the wave at -20C at 10% state of charge (however, do not recharge until battery warms up).

Modern (Chinese) SLAs are of poor quality, not nearly as good as what we had (at higher cost) from Western manufacturers in 1990s.

(btw, try the search function, works great, will return hours of reading on this very topic)

T8