At a glance: Quick facts on the Fulbat FTX4L-BS / FTZ5S-BS: intended for motorcycles and quads, rated 4.2Ah 12V 50A. Get the size and terminal side right and you are most of the way there.
12VVolts
4.2AhCapacity, 20-hour rate (C20)
50ACold cranking current (EN)
Why choose the Fulbat FTX4L-BS / FTZ5S-BS
Quads, jet skis and road bikes all turn up in the list of machines that use the Fulbat FTX4L-BS / FTZ5S-BS. With the positive on the right-hand side, the leads on most bikes that used this code fall into place. Ordering batteries online saves a ride to the dealer on a bike that will not start.
4.2Ah makes it a smaller battery, good for light electrical loads.
Fulbat FTX4L-BS / FTZ5S-BS: dimensions and ratings
Fitting and everyday care
Commuter scooters do short hops every day and rarely give the battery a full charge. Make sure the battery pad or foam goes back in place. Mismatched terminals are a common reason a new battery will not connect.
The AGM technology explained
Picture a sponge holding the acid: that is roughly how an AGM cell works. Glass-mat batteries shrug off vibration, which is why bikes and boats use them so often. Charge an AGM battery on a programme made for AGM, not a generic setting.
Five checks for a perfect fit
- ✓ With 4.2Ah of capacity, hold it up to the figure on the outgoing unit or in your equipment manual.
- ✓ EN cranking amps of 50A. If you are unsure of your requirement, the vehicle handbook usually states it.
- ✓ Sticking with AGM avoids surprises, unless your vehicle maker approves a change.
Frequently asked questions
How do I find the right battery by its code?
Look on the battery label for the part number and search for it with the brand name. That leads directly to the matching product page.
How much weight should I expect to lift?
At 1.43 kg, it is manageable for one person with care. Keep it upright while moving it.
How many cold cranking amps does this battery give?
It delivers 50A. Diesels usually need more than petrol engines, so check your handbook.
Will the Fulbat FTX4L-BS / FTZ5S-BS fit my tray and connect properly?
Compare 113 × 70 × 85 mm with your tray and check the old battery is also positive on the right-hand side.
Alternatives that fit the same space
Other references from our catalogue with the same measurements and terminal position.
Fulbat FTX4L-BS / FTZ5S GELExide AGM12-4Exide ETX4L-BSVarta YT4L-BSVarta YTX4L-4(FA)**
Explore more
A photo of the old label plus this page is all it takes to order with confidence at baterias.online. Keep the radio code handy before disconnecting the old battery.
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