> A-the battery must always be recharged at the proper voltage as spec'd by
> mfg   it must be maintained at FULL charge at all times.
> B-under/over charge will damage a battery
> C-a batteries current demand(amps) is directly related to is discharge
level
>
> 2) Each batt gets it volts/amps directly from the alternator
>     -the aux battery current demand (amps) is supplied from the alternator
>      not from the alternator AND the 1st battery
>      in heavy discharge state the aux may not  get the required amps/volts
> it needs for recharge
Sorry but I was reflecting on these comment & realized I forgot another
point
if the Aux battery is in the heavy discharge state
it will pull the higher amperage that will pass through the
primary battery leading to possible over charge conditions on the primary