BATTERY STATE OF CHARGE
Approx. State of Charge%
Approx. Open Circuit Voltage
100%
12.6V +
80 - 90%
12.4V - 12.5V
50 - 70%
12.0V - 12.4V
10 - 40%
11.6V - 12.0V
0%
11.5V & Below
Charge table
A summary of the above table is that when your batteries are at or above 12.6 volts or above they are at a good charge status & no
further action is required.
If they are between 12.4V to 12.5V volts it is partially discharged, at this charge level they do not need to be recharged yet but will
need monitoring to keep note when they discharge any lower, at which point charging will be required.
If allowed to below 12.4 volts the battery is categorised as now being discharged & should be charged as soon as possible. The
battery will begin to develop permanent damage & the battery’s overall performance will start to diminish.
Charger Types
Having the right charger to suit your power needs is a vital part of battery care & prolonging their lifespan. Below is some more
information regarding the charger supplied with your Unit (if one was supplied) & other kinds of chargers.
Standard Charger
If you were provided with a charger to go with your Unit, please note this is a max 10amp charger. It is designed to provide a
multi-stage charging to your batteries.
If your batteries have fallen to a critically low voltage state (Below 10v) please contact Lumberjack for assistance regarding
recharging them.
Multi Stage Charger/maintainers
Some companies supply chargers which offer up to 9 stage charge functions which can monitor the battery functions to provide the
required charge current to prevent over charging, & prolong battery lifespans. Some feature the ability to repair damaged batteries
to an extent, can charge batteries which have fallen to a very low voltage level, offer ultra low energy consumption or even eco
friendly functions.
Care During storage
When your Lumberjack Unit is being stored it is imperative to take care of the batteries. If left for a long period of time in a low state
of charge sulphation will build up inside the battery & cause internal damage which could lead to dead cells or total battery failure.
The ideal setup for storage is to have the batteries fully charged prior to storage & then top them up/ recharge as required every 2-3
months. At this time also conduct some regular physical maintenance also..
If your unit is stored at a location where you do not have regular access you could also remove the batteries from the unit
completely to keep them closer to you for regular maintenance & charging.
To do this first ensure the isolator switch on your unit is set to ‘off’, then proceed to loosen the securements holding the battery in
place. Release the wing nuts & disconnect the top wires from the unit.
Next you can remove the battery, but BE CAREFUL, the batteries are surprisingly heavy for their size. Always go slow & use
caution when moving the batteries.
During the required maintenance please follow all of the points mentioned in the battery maintenance section of this manual.
Important Note: When charging allow the batteries to charge for a MINIMUM 24 hours. When charging batteries they MUST
be charged fully each time. Failure to do so WILL damage the batteries.
Checking the battery state of charge
Most maintainable batteries (e.g. Century branded) have a water indicator on the top of the battery to give a quick on the spot
diagnosis of the battery condition. This state indicator uses a colour key to identify whether it needs charging, replacing or is okay
this code being as follows:
D07 Rev I
33
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