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Main Lead Acid Battery Types

Starting Batteries and Deep-Cycle Batteries

When people think about lead-acid batteries, they usually think about a car battery. These are starting batteries. They deliver a short burst of high power to start the vehicle engine plus reduced intermittent power for the accessories.

There also are deep-cycle batteries. They are used to power accessories like trolling motors, winches or lights. They deliver a lower, steady level of power for a much longer time than a starting battery.

Lead-acid batteries are used for a vast number of purposes, but all batteries provide either starting or deep cycle power. The only difference is how much power is delivered and for how long it needs to be delivered.

  • SLI – Starting Batteries

    An SLI battery is an automotive battery and stands for Start, Light and Ignition.
    These batteries are usually called Starting Batteries and are commonly used to start and run internal combustion engines.

    There are two main types of SLI batteries : The conventional or LM Low Maintenance and the MF Maintenance Free Battery.

    The Low Maintenance type is the so-called vented battery with filler caps that can be removed for refilling of electrolyte.

    The Maintenance Free type is the sealed type with one or more gas outlet feature to allow gas to vent during charging processes.
    The MF battery is designed with lead calcium alloy technology for minimal electrolyte consumption and increased life, providing true maintenance-free features.

  • Deep Cycle Batteries

    The Deep Cycle Battery is designed to support frequent deep rates of discharges ( 80% D.O.D. max.), and depending on battery size, voltage and other requirements the deep cycle battery is used in Stationary or Traction applications like:

    Golf Carts, Fork Lift Trucks, Lawnmowers, Alarm Systems, Emergency Power Sources, Telecommunication Facilities, Stand By Power Supplies, U.P.S.’s etc.


Capacity: Is the rated Ah delivered by a fully charged battery with a constant discharge current draw over a definite period of time in hours.

Cold Cranking Rating (CCA): Is the rating of the battery under high rate discharge conditions at low temperature, - 17,8o Celsius, over a very short period of time, usually in seconds.
The load in amperes and terminal voltage will vary based on the specification standard adopted.*

Cranking Amps (CA) & Marine Cranking Amps (MCA): Is the rating describing the battery high rate discharge capability at low temperature, 0 o Celsius.
The load in amperes and terminal voltage will vary depending on the specification standard adopted.

Nominal Capacity Rating (C20): Is the battery rating in Ah for which a new, fully charged battery will deliver a constant discharge current over a 20 hour period down to 1,75 volt/cell, or 10,5 volt in a 12,0 volt battery, at 26,7o Celsius.

Reserve Capacity @ 25A (RC): It is defined as the time in minutes for which a new, fully charged battery can be discharged at a constant current of 25 amperes down to at a terminal voltage of 1,75 volt / cell or 10,5 volt in a 12,0 volt battery, at 26,7o Celsius.

*CCA Specified END-POINTS applicable to the various standards

SABS - 18o C 8.4 V 60 seconds Amperes
IEC - 18o C 8.4 V 60 seconds Amperes
DIN - 18o C 9.0 V 30 seconds Amperes
SAE - 18o C 7.2 V 30 seconds Amperes
BCI - 18o C 7.2 V 30 seconds Amperes
JIS - 18o C 7.2 V 30 seconds Amperes
BSR - 18o C 6.0 V 180 seconds Amperes
EN - 18o C 7.5 V / 6.0 V 10 / 15 secs. Amperes

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