At a glance: The battery on this page is the Tudor TZ850, aimed at boats and motorhomes. Terminal position is the detail people most often forget.
Why choose the Tudor TZ850
If the logbook says Tudor TZ850, here are the numbers for the replacement. Measuring 353 × 175 × 190 mm, it needs a locker or battery box with that much room. At baterias.online, leisure batteries sit under maker and reference, so you can match a bank exactly.
100Ah puts it squarely in the middle of the range for boats and motorhomes.
12VNominal voltage
100AhCapacity, 20-hour rate (C20)
900AStarting power (EN)
Will the Tudor TZ850 fit?
- ✓ Plus pole position: positive on the right-hand side. Mixing up orientation is the most common reason a battery of the right size will not connect.
- ✓ The capacity rating, 100Ah, should suit the consumers you run. Lots of electrical equipment calls for the higher end.
- ✓ Starting power: 900A to the EN standard. Match or beat the figure on your current label.
Tudor TZ850 data sheet
ManufacturerTudor
Model codeTZ850
SeriesTUDOR Marina & Leisure Dual EFB
Used forboats and motorhomes
Nominal voltage12V
Capacity, 20-hour rate (C20)100Ah
Starting power (EN)900A
ChemistryEFB
Size L × W × H353 × 175 × 190 mm
Battery weight25.5 kg
Positive terminalpositive on the right-hand side
ConnectorsEN taper post
EAN barcode3661024057608
Frequently asked questions
Is the Tudor TZ850 AGM, EFB, gel or lead-acid?
Look at the sticker on the battery you have now. If it also says EFB, this is a like-for-like choice. If not, check your vehicle or system can handle the change.
Are the terminals of this battery standard?
With EN taper post terminals on this model, cables that already fit that type need no adapter.
Is the Tudor TZ850 part of a wider range?
It belongs to the TUDOR Marina & Leisure Dual EFB line from Tudor. Other models in the same line share the construction and differ mainly in size and capacity.
Does the Tudor TZ850 have an EAN?
The EAN for this product is 3661024057608. It is usually printed on the label or the packaging.
EFB: how it works
Inside an enhanced flooded battery, the plates are built to shed less material over time. Superminis whose engine pauses at junctions, with no brake energy recovery, typically carry an EFB. Keep terminals clean and the hold-down tight.
Same case, same terminal side
If you prefer another make, these fit the same space with the same terminal side.
Exide ET650Exide EZ850Exide EV1250SExide EP800Exide EQ800
See also
Finished comparing? Placing your order online takes a couple of minutes. If the terminal side or size differ, browse the alternatives before ordering.
Fitting and everyday care
A family week on a campsite without hook-up drains a leisure battery steadily. Ventilate the battery locker, even with sealed batteries. Years of nightly cycling eventually take their toll on any leisure battery.
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