# Batteries Najadvarvet Ab Najad 355 2012
**baterias.com** · Year
**URL:** https://baterias.com/gb/boat-batteries/najadvarvet-ab/najad/355/2012

> baterias.com > Boat Batteries > Najadvarvet Ab > Najad > 355 > 2012

## Verified selection

- Application: Boat Batteries
- Make: Najadvarvet Ab
- Model: Najad
- Engine: 355
- Year: 2012
## Technical specifications

- Capacity (Ah): 140 Ah
- Cranking (CCA): 800 A
- Voltage: 12 V V
- Case size: A
- Compatible batteries: 1

## Compatible batteries (3)

| Make | Model | Ref. | Ah | CCA | Price | URL |
|---|---|---|---|---|---|---|
| VARTA | VARTA LFD140 | LFD140 | 140 | 800 | 180.72 EUR | https://baterias.com/gb/battery-varta-lfd140-12v-140ah-800a |
| EXIDE | Battery Exide ER660 140Ah | ER660 | 140 | 800 | 237.44 EUR | https://baterias.com/gb/battery-exide-er660-12v-140ah-750a |
| EXIDE | Battery Exide EN900 140Ah | EN900 | 140 | 800 | 143.65 EUR | https://baterias.com/gb/battery-exide-en900-12v-140ah-800a |
## Frequently asked questions

### What battery does the Najadvarvet Ab Najad 355 use?

The Najadvarvet Ab Najad 355 may use different batteries depending on engine and equipment. We found 3 compatible batteries priced between 143,65€ — 237,44€. Check dimensions and positive terminal position before purchasing.

### Can I install a higher capacity battery in my Najadvarvet Ab Najad 355?

Yes, you can install a higher capacity (Ah) battery as long as the physical dimensions fit your Najadvarvet Ab Najad 355 battery compartment and the positive terminal position matches.

### How long does a Najadvarvet Ab Najad 355 battery last?

A conventional battery in the Najadvarvet Ab Najad 355 lasts between 4 and 6 years under normal conditions. Factors that reduce lifespan: frequent short trips, extreme temperatures, many electrical consumers, and leaving the vehicle parked for long periods.

### How to change the battery in a Najadvarvet Ab Najad 355?

To change the battery: 1) Disconnect negative (−) first. 2) Disconnect positive (+). 3) Remove old battery. 4) Place new one respecting polarity. 5) Connect positive first, then negative. If unsure, consult a professional.

### What battery does my boat or vessel need?

Boats need marine batteries that are resistant to moisture and salt corrosion. Deep-cycle AGM batteries are the most recommended because they can withstand repeated discharges and recharges without deteriorating.

### What is a deep cycle battery?

A deep-cycle battery is designed to be discharged to 80% of its capacity and recharged repeatedly. It is ideal for boats where it is used as an extended power source. Do not confuse it with a standard starter battery.

### How do I find the right battery for my vehicle?

Use the search tool by selecting your vehicle's make and model. Our system automatically filters compatible part numbers verified by our technicians. If you have any questions, contact us via WhatsApp.

### What warranty do the batteries have?

As they are consumable items, car batteries have a 2-year warranty, truck batteries a 1-year warranty, and all others (motorcycle batteries, cyclic batteries, etc.) a 6-month warranty. If a battery has a manufacturing defect, it will be replaced at no cost to the user.

### How long does it take for the battery to arrive?

Under normal circumstances, batteries usually arrive within 1 to 2 days of ordering. However, there are some cases where delivery may take a little longer: peak seasons (Black Friday, Christmas, etc.), palletized shipments, occasional stock shortages, etc.

### ¿Qué capacidad (Ah) debe tener la batería del Najadvarvet Ab Najad 355 (2012)?

Las baterías compatibles con el Najadvarvet Ab Najad 355 (2012) tienen una capacidad de 119 Ah. Al elegir, respeta la capacidad original de tu vehículo: una capacidad menor podría dar problemas de arranque en invierno o con accesorios encendidos; una capacidad mayor cabe si las dimensiones coinciden y mejora la autonomía.

## Guides

### How to identify the battery polarity of the Najadvarvet Ab Najad 355

Knowing your battery polarity (positive on the right or on the left) is the most important step before buying a replacement: connecting it the wrong way can damage the electronics. Estimated time: 2 minutes. Tools: eyes only — no tools required.

1. **Locate the battery** — Open the bonnet of the Najadvarvet Ab Najad 355 and find the battery. It is usually a rectangular block with two metal terminals (large screw heads) on top — one red or "+" and one black or "−".
2. **Identify the positive terminal** — The positive terminal (+) typically has a red cap, red sticker or cover, a raised "+" symbol on the casing, and/or a slightly larger diameter (19 mm vs 17 mm of the negative, in standard European batteries).
3. **Face the battery** — Look at the battery from the label side with the terminals near you — the edge with the terminals should face you, not the back.
4. **Determine polarity** — If the positive pole is on the RIGHT → polarity 0 (positive right). If it is on the LEFT → polarity 1 (positive left). On batteries with side terminals, the convention changes: polarity 4 (narrow-side right) and polarity 3 (narrow-side left).
5. **Note the reference** — The label on top shows the reference (e.g. "A9", "TK960", "EA900"). Search for the exact model with that reference and the identified polarity — never change polarity without consulting the vehicle manufacturer.

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