In short: Quick facts on the Fulbat FDM12-900: intended for boats and motorhomes, rated 180Ah 12V 900A. Get the size and terminal side right and you are most of the way there.
12VVoltage
180AhCapacity, 20-hour rate (C20)
900ACold cranking amps
Is the Fulbat FDM12-900 right for you?
Narrowboats and fishing boats sometimes carry a Fulbat FDM12-900 too. Leisure batteries are judged on capacity and recovery more than on cranking. With the logbook open beside you, finding the Fulbat FDM12-900 at baterias.online is straightforward.
Need extra reserve? 180Ah puts this one near the top for boats and motorhomes.
Fulbat FDM12-900: dimensions and ratings
MakeFulbat
Model codeFDM12-900
RangeFULBAT FDM Marine AGM Carbon
Applicationboats and motorhomes
Voltage12V
Capacity, 20-hour rate (C20)180Ah
Cold cranking amps900A
ChemistryLead-carbon
Dimensions (L × W × H)512 × 222 × 218 mm
Battery weight51 kg
Polaritypositive on the left-hand side
TerminalsAUTOMOTIVE
Fitting and everyday care
A campervan on a rainy week in Scotland leans hard on its leisure battery. Use identical batteries of the same age when connecting several in parallel. Storing a bank half empty in the cold costs capacity that never comes back.
Care tips for lead-carbon batteries
Lead-carbon batteries look like AGM from the outside. Lead-carbon tolerates long periods of partial charge. Use temperature compensation where possible.
Before you order: a quick checklist
- ✓ Consider extra loads such as a tow bar when comparing 180Ah.
- ✓ Starting current 900A: look for the EN value on your old label and choose this reference only if it is equal or higher.
- ✓ These are AUTOMOTIVE terminals. Photograph the old ones before ordering to compare side by side.
Common questions about the Fulbat FDM12-900
How large and heavy is this battery?
At 512 × 222 × 218 mm and 51 kg, it needs a tray of that size and a careful lift.
What do 180Ah and 900A mean for this battery?
180Ah indicates how much charge it stores, 900A how much current it can deliver in a cold start. Both should be at least equal to the original.
Is the Fulbat FDM12-900 suitable for a 12V system?
Nominal voltage is 12V and capacity 180Ah. Wiring two in series doubles the voltage, while parallel wiring doubles the capacity.
See also
Got the old battery's label in front of you? Compare it once more, then order online at baterias.online. Have a spanner and a wire brush ready on the day.
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