PowerTech MB3914 Instruction Manual page 7

• Bulk Charge (Charging stage 3 illuminated) – Maximum charge current is
delivered to the battery to minimise charge times.
• Absorption (Charging stage 4 illuminated) – Reduces the current supplied
to the battery and ensures that the battery has been completely charged
without the risk of being overcharged.
• Analysis (Charging stage 5 illuminated) – The charger shuts off power and
measures voltage drop over a set time. If unacceptable readings are measured,
this may indicate an internal short or other issue inside the battery. If the
battery has a fault the charger will illuminate the Battery Error LED indicator
(Red LED). The charger will cut output and not continue to charge until it is
either switched off, or the battery is removed.
• Boost / Equalisation charge (Charging stage 6 illuminated) – Once
the battery is fully charged, the charger will equalise all the battery cells by
providing a steady set voltage over a programmed period, at low current.
• Float Stage (Charging stage 7 illuminated) – Once the battery is fully
charged, the charger will provide a constant voltage of 6.85V/13.7V/27.4V to
maintain the battery at a full level without damaging the battery.
Temperature Compensation – This charger has a temperature compensation
feature that will reduce the output current of the charger if the charger internal
temperature exceeds its set limit. This protection feature will prevent the battery
and charger from damage if the bulk stage takes an extended time – particularly
if a larger than recommended battery has been connected. There is no indicator
to show temperature compensation.
The 6V / 12V / 24V, 8A/12A/16A fully automatic 7 stage battery charger is
designed to effectively charge most automotive battery types including lead acid,
calcium, maintenance free, Gel and AGM and 12V Lithium batteries. They are
manufactured to the latest design parameters and highest quality levels. There
are no buttons to decipher - the specially designed microprocessor charging
system automatically selects the correct voltage and current setting and output
levels for the size and type of the battery, greatly assisting prolonged battery life
and user safety. Please adhere to all safety directions in this manual and retain for
later use.
Important Safety Instructions:
• Battery chargers contain hazardous voltages. There are no user serviceable
components inside the charger. Do not disassemble this product.
• If the AC supply cord is broken or damaged, it must be replaced a qualified
person only.
• This battery charger is for use with 6, 12 and 24V electrical systems only. Care
should still be taken to correctly identify the correct voltage on vehicles and
light trucks BEFORE the battery charger is connected and switched on.
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