DOB 1300-1556 | X3-45 Commuter PA-1648 Maintenance Manual Section 06 revised release October 2021
FIGURE 29: AGM BATTERY CONNECTIONS
9.2 AGM BATTERIES
This vehicle is equipped with PRIME energy
management system, it is provided with four (4)
Absorbed Glass Mat (AGM) 12-volt batteries
connected in series-parallel.
These batteries require no maintenance for their
lifetime. They can withstand deeper discharge
cycles and several times the charging cycles of
a standard battery.
These are sealed, valve regulated recombinant
batteries which means that the oxygen created
will recombine with the hydrogen in the battery,
creating water and preventing water loss. Water
never needs to be added to this type of battery.
The top-mounted negative and positive
terminals are tightly sealed to prevent leaks.
The electrolyte in this type of battery is absorbed
in micro-porous glass separators. This design
prevents spills and results in greater resistance
to vibration.
Always replace these batteries with identical
make and model batteries as the system is
balanced and optimized for this type of battery.
CAUTION
Replace only with AGM type batteries
same specification and capacity.
PRIME system is programmed for the charging
capacity of the batteries installed.
Installing a higher capacity battery will affect
the battery life as the system will not fully
charge the batteries, which is detrime
battery performance.
Refer to “Specifications” at the end of this
section for further details.
AGM batteries should be replaced in pairs or
four at a time.
CAUTION
AGM (Absorbed Glass Mat) batteries require a
voltage-limited charger, ideally
fitted with a
battery temperature sensor for temperature
correction of charging parameters.
Charge voltage: 13.8-14.6 Volt @77°F (25°C)
Float voltage: 13.4-13.6 Volt @77°F (25°C)
Charging AGM battery on a typical constant
current or taper current charger –
time – may greatly shorten its life.