to do with Gel, AGM and Lithium Ion
Incorrect charge voltage. Too low a voltage means that
the battery cannot charge to 100 % - the sulphate then
hardens on the plates and the battery loses its capacity.
Excessive voltage causes the batteries to generate gas,
leading to water loss and drying out.
Excessive discharging. Discharging a battery further than
its capacity shortens its lifespan.
Too large ripple on the charge voltage. Cheap and old-
fashioned chargers often have a significant voltage ripple
(voltage variation) in the output voltage.
The use of an alternator without 3-step regulator, a high
ambient temperature or charging without temperature
The MLI battery should not be charged without measures
such as a safety relay.
Can I keep my batteries connected during winter?
This is no problem for any Mastervolt battery, and can even
be a benefit as the lower temperature extends battery life
considerably. The batteries should be fully charged, however,
and disconnected from any consumers.
Make sure to consider hidden consumers such as voltmeters,
clocks and the car radio memory. If the battery is connected to
a Mastervolt battery charger with 3-stage+ charge characteristic,
the battery is recharged every 12 days to ensure it stays in
optimal condition. If you disconnect the battery we recommend
disconnecting all consumers and connecting the power once
every two to three weeks to ensure the batteries are recharged.
If you don’t have access to power in winter, we recommend fully
charging the batteries and disconnecting the battery terminals
to ensure they are not discharged by small devices. We also
recommend fully charging your batteries every two months
and before they are reused. Wet batteries should be recharged
regularly to prevent them from freezing.
How should I maintain gel, AGM and Lithium Ion
Gel, AGM and Lithium Ion batteries as opposed to traditional
open batteries do not need maintenance, which means they can
be installed anywhere. However, we recommend checking all
the connections once a year to make sure that they are properly
attached, and to clean the top surfaces with a slightly moist cloth.
The batteries also need to be completely charged every time for
a maximum lifespan.
The Gel battery
With flooded lead-acid batteries, which use a liquid electrolyte of
water and sulphuric acid, the water is separated into hydrogen
and oxygen during charging, mostly at the end of the charging
cycle. These gases subsequently escape through the filler cap.
This means water is used and distilled (battery) water needs to
be added. The electrolyte in a Gel battery is a gel that binds the
water with the acid. While the batteries are being filled, the gel
is heated and liquefies.After the battery has been filled with the
liquefied gel, the gel cools and solidifies. This process results in
tiny hairline cracks in the gel between the plates.
During the charging process, oxygen O
is generated on the
positive plate and hydrogen H
on the negative plate. The cracks
in the gel let the gases combine to create water. The gel then
absorbs the water so that no water disappears from the system
and no gases are produced.
Gel batteries are not a new technology and have been in use
since the late 1950s. The most important applications are in
emergency power systems, telecommunications systems, power
supply and, for the last 20-25 years, as service batteries in
various systems. Gel batteries come in two different versions.
The 12-volt design is appropriate for regular use and available in
capacities up to 200 Ah.
Which battery is suitable for my application?
Mastervolt offers various types of maintenance-free batteries,
each with its own specific characteristics. More information
hereafter about the properties of gel, AGM and Lithium Ion