Equalization of batteries should be carried out with batteries
that have 0.10V or more of difference between them. They should be
connected in parallel for at least 12 hours before charging, notwithstanding
the number of units. Equalization is more efficient when the batteries
have similar capacities.
Note
Batteries with less than 11V do not require equalization, because
these are considered to have 0% charge.
Note