Varta LA50 · Marine battery 12V 50Ah 540A AGM

Marine battery Varta LA50 12V 50Ah 540A - front view
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  • Marine battery Varta LA50 12V 50Ah 540A - top view

Specifications

BrandVARTA
Part numberLA50
Voltage (V)12
Capacity (C20)50Ah (c20)
TechnologyAGM
Length207 mm
Width175 mm
Height190 mm
Terminal layoutPositive terminal on the right
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Varta LA50 12V 50Ah 540A is a marine battery, vibration- and deep-discharge resistant, suitable both for outboard engine starting and for onboard auxiliary services (navigation lights, GPS, sonar, fridge). Sealed and maintenance-free.

Why this marine battery?

  • Marine designbuilt for boat swell and vibration
  • Dual functionstarts the engine and powers onboard services
  • Sealed and safemaintenance-free even when the boat rolls
Voltage
12 V
Capacity
50 Ah C20
Cold cranking
540 A EN-1
Dimensions
207×175×190 mm
Technology
AGM
Polarity
Positive on the right
Weight
14,72 kg
Model
Professional Dual Purpose AGM
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Varta LA50 Professional Dual Purpose AGM 50Ah 540A 12V Battery

12VVoltage
50AhCapacity
540ACold cranking

The Varta LA50 battery is the 12 V, 50 Ah model delivering 540 A of cold cranking power (EN), from Varta's Professional Dual Purpose AGM range, designed for motorhomes, boats and auxiliary power equipment. Its 207 × 175 × 190 mm dimensions and positive terminal on the right make it the exact replacement for the 50 Ah battery fitted as standard in many vehicles.

  • Ideal for motorhomes, boating and leisure power.
  • Dual cycle: it both starts the engine and powers auxiliary equipment.
  • More on-board running time than a conventional starter battery.
  • Withstands deep discharges and repeated recharging without degrading.

Applications of the Varta LA50 battery

With 50 Ah, the Varta LA50 is sized for motorhomes, boats and auxiliary power equipment, as a direct replacement for the original battery. Check that it matches your current battery in dimensions, terminals and hold-down: this reference has a B13 hold-down.

Format and fitting of the Varta LA50

The Varta LA50 is built in the 207 × 175 × 190 mm format. The positive terminal on the right determines which side the cables run to: it is the detail that causes the most buying mistakes, so it is worth checking before ordering. It uses a B13 hold-down, the system that anchors it to the vehicle's battery tray. Checking the three dimensions and the terminal position before buying avoids the most common mistake when replacing a battery.

The Varta LA50 and the Professional Dual Purpose AGM range

The Professional Dual Purpose AGM range combines dual purpose (starting + leisure supply) with AGM technology, which brings greater resistance to cycling, zero maintenance and safety against spillage.

It is the demanding choice for motorhomes and boats that need to start the engine and sustain a heavy equipment load with maximum durability.

Unlike a pure starter battery, this range withstands deep discharges and repeated recharging without degrading: exactly what a motorhome or a boat drawing power with the engine off requires. It therefore combines starting and leisure supply in a single dual-cycle battery.

Why choose a Varta battery

Manufactured by Clarios to German standards, Varta is one of the world's benchmark brands in starter batteries and an OEM supplier to the leading car makers. Choosing it as a replacement guarantees specifications equal to or better than the originals.

Varta combines more than a century of experience with Clarios's industrial production: it is the battery many manufacturers choose as standard and one of the most recommended by workshops. Like any lead-acid battery, it is 100% recyclable.

Varta is Europe's leading manufacturer of starter batteries: its production volume and quality controls guarantee consistent reliability batch after batch, something own-brand labels cannot always promise.

Manufacturer's warranty

The Varta LA50 battery comes with the official manufacturer warranty.

Care and maintenance

In leisure use, avoiding discharges below 50% of capacity multiplies the number of cycles. A suitable charger and, where possible, a solar regulator keep it healthy through the seasons when it sees less use. To extend its life, recharge it as soon as possible after each discharge and never leave it flat over the winter. A trickle charger is the best investment for getting many cycles out of it.

BCOM-VARTA-LA50

Data sheet

Brand
VARTA
Reference
LA50
Model
Varta Professional Dual Purpose AGM
Voltage (V)
12
Length
207 mm
Width
175 mm
Height
190 mm
Technology
AGM
EAN
4016987169919
Terminal layout
Positive terminal on the right
Hold-down
B13
Cold cranking amps (EN)
540A
Capacity (C20)
50Ah (c20)
Additional ETN
840050054K312

Specific References

EAN13
4016987169919
MPN
LA50

Codes and references Varta LA50

Brand Varta · see all batteries Varta
Manufacturer reference (MPN) LA50
EAN-13 barcode 4016987169919
European case size (EN 50342-2) L1
Dimensions (length × width × height) 207 × 175 × 190 mm (207x175x190)

Comparison: Varta LA50 vs equivalents — alternatives with the same dimensions, Ah and CCA

The Varta LA50 is interchangeable with these equivalent references: A9 (Varta), EK500 (Exide), TK500 (Tudor).

Product Specifications Technology Price
Varta LA50 Varta LA50 This battery
Varta A9 Varta A9 ★ 4,8 12V 50Ah 540A AGM €118.90
Exide EK500 Exide EK500 50Ah 570A AGM €108.60
Tudor TK500 Tudor TK500 50Ah 570A AGM €108.60

Equivalences verified by our technical team: same dimensions, polarity, capacity and CCA. Official manufacturer warranty on every option.

Recommended accessories — complement the Varta LA50 with a charger or tester

How to change the battery

Guide to replace a marine battery (cranking or house) in 20-30 minutes. Moisture and vibration in marine environments require reinforced hold-downs and sealed copper terminals.

⏱ 20-30 min🛠 Tools: 10 mm or 13 mm wrench (depending on terminal) · Protective gloves
  1. Step 1. Prepare the vehicle

    Park on a flat surface, switch off the engine and remove the key. Make sure all lights and electrical accessories are off. Wait 1-2 minutes before starting.

  2. Step 2. Locate the battery compartment

    Usually under the passenger bench, engine room or a dedicated ventilated compartment. Verify the compartment is dry and well ventilated before opening.

  3. Step 3. Disconnect the negative (−) terminal

    Use the 10 mm wrench to loosen the negative cable nut (black, marked −) and remove the cable from the post. Move it aside so it cannot touch any bodywork.

  4. Step 4. Disconnect the positive (+) terminal

    Repeat with the positive cable (red, marked +). Important: never let a terminal touch metal of the car while the other is still connected.

  5. Step 5. Remove the old battery

    Marine batteries are heavy (15-50 kg). If it has rope handles, use them; otherwise have a carry strap ready. Secure the new one with metal hold-downs (not plastic) to resist sea-state vibration.

  6. Step 6. Install the new battery

    Place the battery in the same orientation as the old one (positive terminal on the same side). Tighten the hold-down clamp firmly.

  7. Step 7. Connect the cables

    Connect the positive (+) terminal first, then the negative (−). Tighten the nuts with the wrench until each terminal does not move. Apply anti-spark grease if you have any.

  8. Step 8. Verify circuit + water protection

    Apply dielectric grease on terminals to prevent salt-air corrosion. Check the engine charging circuit delivers 13.8-14.4 V at 2,000 rpm.

Frequently asked questions

How do I change this battery step by step?

In most boats it fits in 15-30 minutes with a 10 mm wrench; if the battery is under the seat or in the boot the time can double. See the step-by-step guide on this page. Quick summary: 1) switch off the engine and remove the key; 2) locate the original battery (engine bay, boot or under seat); 3) disconnect the negative (−) terminal first, then the positive (+); 4) loosen the hold-down clamp and remove the old battery; 5) fit the new one in the same orientation — match the polarity shown on the product sheet; 6) connect the positive (+) first, then the negative (−). On boats with Start-Stop or BMS, register the battery via OBD so the alternator applies the correct charging profile.

How long does the Varta LA50 battery last?

Expected lifespan of the Varta LA50 is 4 to 7 years in regular use (depends on technology and climate). In cold regions it drops slightly due to cold-start stress; in very hot regions it also drops because of electrolyte evaporation. To extend its life: avoid deep discharges (headlights on with engine off), have the alternator checked yearly, and keep the battery clean and properly secured.

What are the dimensions of the Varta LA50 battery?

Dimensions (length × width × height) are 207×175×190 mm — also written as 207x175x190 mm and correspond to the European L1 case size — following the European DIN standard. Always measure the space in your boat before buying: even one extra millimetre can prevent the hold-down clamp from closing. The height shown includes the terminals.

Will the Varta LA50 battery fit my boat?

Three options to confirm: 1) enter your number plate in the finder (DGT/DVLA/KBA auto-detect your model and engine); 2) check the "Compatible vehicles" tab on this page, where we list every vehicle verified by our technical team; 3) if you cannot find your model, message us on WhatsApp with brand, model, engine and year — we reply during business hours (Mon–Fri 10:00–13:30 and 16:40–18:00 (Spanish time, CET)). The LA50 typically fits a wide range of European vehicles thanks to its standard DIN case format.

Which batteries are equivalent to the Varta LA50?

Directly interchangeable batteries (same dimensions, same polarity, same Ah and CCA) are the OEM equivalents from leading brands: Bosch, Tudor, Exide and, depending on the model, Banner or Yuasa. Exact equivalence depends on technology — an EFB cannot be replaced with a conventional battery in Start-Stop boats. See the "Equivalents" section to view recommended options at the same performance level.


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