MotoBatt Battery Charger – Commonly asked questions and answers
Q1: Are “Smart” MAINTAINERS or simple “Trickle” CHARGERS required for PowerSports battery applications?
A1: The MB-VM is simple and inexpensive voltmeter that shows the open circuit state of charge of a battery in the
form of % of charge. When used with the engine is started it will also indicate overcharge voltage going to the
battery with the “bad” indicator light and passing charge voltage with the “good” indicator light. Another cool part
about the meter is that it can be used to remotely test the battery, without actual access to the battery by
inserting the probes (in the fixed position) into the battery charge / maintenance lead and if the battery is
accessible or on the workbench you can remove the negative lead from its fixed position and test the battery at
each terminal location. It’s a great tool for every dealership counterperson in a dealership or any consumer.
Q2: What should be used to charge or maintain modern AGM batteries?
A2: Smart chargers are required for use on all AGM or GEL batteries. Sealed Valve Regulated batteries (AGM and
Gel) may be damaged or dried out and ruined if they are overcharged. The damage that can be caused by
improper charging becomes permanent and gets worse over time. All major PowerSports vehicle manufacturers
now use AGM batteries from the factory. The correct way to charge or maintain these AGM batteries is with a
smart charger, and with its exclusive 9 step algorithm technology MOTOBATT is the best option.
Q3: What can happen if a manual or “non-smart” charger is used on a AGM or GEL battery?
A3: Bottom line is manual chargers are NOT suitable for AGM or GEL batteries. Unless monitored constantly they
may cause overcharging from too high constant voltage, which is the cause of swelling of the battery case in AGM
and GEL batteries during charging (a faulty charging system may also cause overcharging and subsequent swelling
of the battery case). Note this is NOT a valid warranty claim on any GEL or AGM battery. The message is simple,
use a suitable Motobatt smart charger with all lead acid batteries, especially AGM and GEL batteries.
Q4: Which MOTOBATT MAINTAINER for which size battery?
A4: Matching a MOTOBATT CHARGER AND MAINTAINER with battery capacity is not required, as voltage and
amperage are constantly monitored, and reduced or increased by the unique Motobatt 9 stage charging and
maintenance process. However you may wish to choose a MOTOBATT CHARGER AND MAINTAINER to suit your
budget or your performance requirements.
MOTOBATT models: Little Boy, Water Boy, Big Boy, Fat Boy, Dual bank and Four bank are a microprocessor
controlled “Charger and Maintainer” in one unit, and enable a regular consumer without battery knowledge to
properly charge and maintain any lead acid battery safely.
MOTOBATT models: Baby Boy Charger will charge 6 or 12V Power Sports batteries to full charge then move into
safe mode and automatically shut off. The Baby Boy Charger is not designed to charge a large dead flat or
Q5: Can Motobatt Maintainers be used on automotive and marine batteries?
A5: Yes, Motobatt Charger/Maintainers (models Little Boy, Water Boy, Big Boy, Fat Boy, Dual Bank and Four Bank)
are suitable for use on all domestic lead acid batteries, including automotive and marine. Fat Boy model and up are
of higher specification and will provide subsequent greater performance on larger batteries.
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