The Komatsu CK25-1 skid-steer battery size is Group 31, and it uses a 12-volt electrical system. Its 600 CCA rating is average for Komatsu skid-steers in this dataset.
ModelCK25-1
BrandKomatsu
Voltage12 V
EquipmentSkid Steer
Voltage
12 V
Cold cranking
600 CCA
Battery size
Group 31
Battery location
See details below
How this battery compares
Compared with other Komatsu skid-steer battery ratings in this dataset.
Cold cranking amps600 CCA
Average
LowAverageHigh
Low 600 CCAMedian 600 CCAHigh 1050 CCA
BA
Battery specification
Model-specific replacement data
System voltage
12 V
Battery group size
Group 31
Cold cranking amps
600 CCA
RP
Replacement battery
What to match when buying
Use a heavy-duty 12 V starting battery in BCI Group 31 with about 600 CCA (or higher), provided the case dimensions, hold-down and terminal orientation match. AGM is a good upgrade for vibration resistance; verify the machine serial number before purchase.
LC
Battery location
Where the battery is mounted
The battery is normally in the rear engine/service compartment behind a service cover; verify the serial-specific access point before removal.
ID
Model details
Equipment identity
Brand
Komatsu
Model
CK25-1
Equipment class
Skid-Steer Loader
HOW
How to replace the battery
Basic replacement procedure
Park on level ground, lower the lift arms/attachment, stop the engine, remove the key and isolate electrical power. Open the battery access, disconnect the negative cable first and then positive, remove the hold-down and lift out the battery. Clean the tray/terminals, install the replacement securely, connect positive first and negative last, then verify charging voltage and starting operation.
!
Bad battery symptoms
Signs the battery may be failing
Common signs are slow or no cranking, repeated clicking from the starter/solenoid, dim or flickering lights/display, electronics resetting during crank, needing frequent jump-starts, rapid self-discharge, corroded/swollen battery case, or resting voltage that quickly falls under load. Confirm cable condition and alternator output before condemning the battery.
?
What battery size fits the Komatsu CK25-1?
Quick answer
Group 31. Best available fitment is based on closest same-brand/model-family match (SK820-5E0); confirm tray dimensions, terminal layout, and serial number before ordering.
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How many CCA does the Komatsu CK25-1 need?
Quick answer
600 CCA. Best available fitment is based on closest same-brand/model-family match (SK820-5E0); an equal-or-higher CCA replacement is acceptable if the physical size and terminals match.
?
What voltage battery does the Komatsu CK25-1 use?
Quick answer
12 volts. Skid-steer starting/charging systems for this model family use a 12 V battery system; confirm serial-specific configuration before replacement.
?
Where is the battery on the Komatsu CK25-1?
Quick answer
The battery is normally in the rear engine/service compartment behind a service cover; verify the serial-specific access point before removal.
?
What is the best replacement battery for the Komatsu CK25-1?
Quick answer
Use a heavy-duty 12 V starting battery in BCI Group 31 with about 600 CCA (or higher), provided the case dimensions, hold-down and terminal orientation match. AGM is a good upgrade for vibration resistance; verify the machine serial number before purchase.
Disclaimer: Battery specifications are for general reference and may vary by year, serial number or configuration. Always verify fitment and electrical requirements before purchase or installation. See the Komatsu website for manufacturer information.
