Deep Cycle Marine Battery
The battery charging requirements for the domestic, deep cycle batteries found on most boats differ, depending on the type and capacity of the battery.
Correct charging will maintain your marine leisure batteries for a longer life.
These batteries are popular as they are designed to provide power over long periods and are tolerant of being run flat occasionally.
Using the correct
charger for your deep cycle batteries will prolong its life, keep it
charged and take much of the guesswork out of battery charging.
The correct charger will
depend on the type and capacity
of your battery.
Not all chargers will be right
for all types.
Also, having a battery
maintenance routine can help
prolong all your batteries.
They require cycled
charging and re-charging for the
battery to reach its maximum capacity.
need a charger that will perform a multiple re-charging processes,
single stage charge of a normal automotive charger.
of the lower priced ones
have to be started and stopped manually and unhooked when not in
The chargers also come
sizes, to suit the
battery's capacity, for banks of batteries you will need a multiple
If you have paid a lot
money for your batteries it
will be worth while investing a bit more and fitting a Smart
A smart charger monitors
battery and controls the
charging voltages and currents needed to provide a complete charge and
will also equalize the charge in the individual battery cells.
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main types of deep cycle battery.
The most common type is
Wet Cell battery.
This is the one most
be bought off the
The AGM (Absorbed Glass
type is similar except that
the electrolyte is contained in a woven mesh which keeps it in constant
with the plates.
They are usually sealed
regarded as maintenance
The VRLA (Valve Regulated Lead
Acid) type is another
sealed 'maintenance free' type.
This type has an internal
valve to allow gases to
All the above three can use
the same type of
The fourth type of battery is
the Gel Cell.
These use a thickening agent
to 'gel' the
electrolyte so it doesn't slop around.
As with other deep cycle
batteries they are designed for
extended cycle times but also require longer recharging times.
However, the gel cell type is
also susceptible to damage
from over or incorrect charging.
So, using a 'smart charger' is
option for this type.
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Boat Books on-line
battery you have on a boat is should be secured in a vented battery
This will protect it and the
connections from any
While it is good practice to
coat the terminals with a
thin layer of grease, you should also give them a regular clean.
Any build up of oxidation on
the terminals will result in
a voltage drop.
If you don't have a 'smart
occasional extended charging with a lower electric voltage will
equalize the charge in the individual cells.
And of course check all
electrical connections for
tightness and corrosion.
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Battery Isolation Switch Can you help me, I need to rewire the battery and I would like to fit an isolation switch.
Is there a basic wiring diagram available for this?