Battery definitions CCA Rate CCA stands for the "cold cranking amperes". It refers to the number of amperes a battery can support for 30 seconds 0°F until the battery voltage drops to 1.20 volts per cell, or 7 .20 volts for a 12V battery. If a 1 2V battery has a rating of 600 CCA that battery will provide 600 amperes for 30 seconds at 0°F before the voltage falls to 7.20V. MCA Rate MCA stands for the "marine cranking ampere". It r efers to the number of amperes a battery can support for 30 se conds at 32°F until the battery voltage drops to 1.20 volts per cell, or 7.20 volts for a 12V battery. A 12V battery that has a MCA rating of 600 CCA t ells us that the battery will provide 600 amperes for 30 seconds at 32°F before the voltage falls to 7.20V. Sometimes MCA referred to as the cranking amperes or CA. What is the difference between CCA and MCA? MCA is very similar to the CCA - the only difference is that the CCA is measured at a temperature of 0°F and the MCA is measured at 32°F. Everything else are the same — the amp draw is for 30 seconds and the end of discharge vo ltage in both cases is 1.20 volts per cell. HCA Rate HCA is hot cranking amperes. It is the same thing as the MCA or the CA or the CCA, except that the temperature is 80°F. PHCA Rate No “official” definition, but battery manufacturers regard the PHCA as a very short duration (typically about 3 - 5seconds) high rate discharge. This discharge is more like a pulse because of it’s short duration. Ah or Ampere Hours The ampere-hour (Ah) rating tell s you the capacity of a battery. A battery that is rated at 100Ah at the 10 hour rate of discharge is capable of delivering 10A for 10 hours before the terminal voltage drops to a standard value such as 1.67 volts per cell, or 10.02 volts fo r a 12V battery. Similarly, a 50Ah battery would supply a 5A load for 10 hours. Reserve Capacity A. The reserve capacity of a batt ery is the number of minutes that a battery can support a 25 ampere load at 80°F until its terminal voltage drops to 1.75 volts per cell or 10.50 volts for a 12V battery. A 12V battery that has a reserve capacity rating of 100 shows that it can be discharged at 25 amps for 100 minutes at 80°F before its voltage drops to 10.75 volts. AGM Battery Absorbed Glass Mat – there is no free acid in an AGM battery . The ac id absorbed in the glass mat separators. These separators serve to keep the positive and negative plates apart. This prevents acids spills in the event of a battery case leak Deep Cycle A deep-cycle battery is designed to be regularly discharged to most of its capacity. In contrast, most automotive batteries are designed to deliver high current for cranking the e ngine, and to be frequently discharged of only a part of their capacity.

Battery Definitions

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Battery definitions

CCA Rate

CCA stands for the "cold cranking amperes". It refers to the number of amperes a battery can support for 30 seconds

0°F until the battery voltage drops to 1.20 volts per cell, or 7.20 volts for a 12V battery. If a 12V battery has a rating of

600 CCA that battery will provide 600 amperes for 30 seconds at 0°F before the voltage falls to 7.20V.

MCA RateMCA stands for the "marine cranking ampere". It refers to the number of amperes a battery can support for 30 seconds

at 32°F until the battery voltage drops to 1.20 volts per cell, or 7.20 volts for a 12V battery. A 12V battery that has a MCA

rating of 600 CCA tells us that the battery will provide 600 amperes for 30 seconds at 32°F before the voltage falls to

7.20V. Sometimes MCA referred to as the cranking amperes or CA.

What is the difference between CCA and MCA?

MCA is very similar to the CCA - the only difference is that the CCA is measured at a temperature of 0°F and the MCA is

measured at 32°F. Everything else are the same— the amp draw is for 30 seconds and the end of discharge voltage in

both cases is 1.20 volts per cell.

HCA Rate

HCA is hot cranking amperes. It is the same thing as the MCA or the CA or the CCA, except that the temperature is 80°F.

PHCA Rate

No “official” definition, but battery manufacturers regard the PHCA as a very short duration (typically about 3 -

5seconds) high rate discharge. This discharge is more like a pulse because of it’s short duration.

Ah or Ampere Hours

The ampere-hour (Ah) rating tell s you the capacity of a battery. A battery that is rated at 100Ah at the 10 hour rate of

discharge is capable of delivering 10A for 10 hours before the terminal voltage drops to a standard value such as 1.67

volts per cell, or 10.02 volts for a 12V battery. Similarly, a 50Ah battery would supply a 5A load for 10 hours.

Reserve Capacity

A. The reserve capacity of a battery is the number of minutes that a battery can support a 25 ampere load at 80°F untilits terminal voltage drops to 1.75 volts per cell or 10.50 volts for a 12V battery. A 12V battery that has a reserve capacity

rating of 100 shows that it can be discharged at 25 amps for 100 minutes at 80°F before its voltage drops to 10.75 volts.

AGM Battery

Absorbed Glass Mat – there is no free acid in an AGM battery . The acid absorbed in the glass mat separators. These

separators serve to keep the positive and negative plates apart. This prevents acids spills in the event of a battery case

leak

Deep Cycle

A deep-cycle battery is designed to be regularly discharged to most of its capacity. In contrast, most automotive

batteries are designed to deliver high current for cranking the engine, and to be frequently discharged of only a part oftheir capacity.