.:
battery rating terminology
|
CCA
|
Defined as Cold Cranking Amps The number of amps a battery can
deliver for 30 seconds at 0°F before
the voltage drops to 1.20 volts per
cell (7.20 volts for a 12 volt
battery).
|
MCA |
Defined as Marine Cranking Amps (sometimes called CA)
The same test as CCA except at 32°F. |
HCA |
Defined as Hot Cranking Amps
The same test as CCA except at 80°F. |
Ah rating |
Defined as ampere-hour rating capacity -
may be a 10-hour and/or 20-hour rate of
discharge A 12 volt battery rated
at 50Ah for the 10-hour rate of
discharge can supply 5amps for 10 hours
before its voltage drops to 10.02 volts.
This does NOT mean that it
can supply 50amps for 1 hour.
Using the Odyssey PC1500
battery data. - Its advertised 10-hour rating is 62Ah
-
The data shows it can supply 6.2 amps for 10 hours
- The data shows it can supply 60 amps for 45 minutes, NOT 62 amps for 1 hour.
|
Reserve Capacity |
Refers to the number of minutes a
battery can supply 25 amps at 80°F
before its voltage drops to 10.50 volts
(for a 12 volt battery). |