Electrolyte temperature and available capacity
Electrolyte Temperature and Available Capacity
When operating in low ambient temperatures
the battery's electrolyte temperature falls and available
capacity decreases accordingly.
The following diagram shows how to estimate available capacity.

These are guide figures only as other factors can also affect the capacity.
These are guide figures only as other factors can also affect the
capacity. Wet batteries should not be discharged below 80% of
their rated capacity maintenance free batteries below 60%.