# Truck battery Varta J1 12V 125Ah 720A

![Truck battery Varta J1 12V 125Ah 720A](https://baterias.com/4215-home_default/battery-varta-j1-12v-125ah-720a.jpg)

> Varta J1 truck battery 12V 125Ah 720A. Official Varta Distributor. ProMotive SLI range. Dimensions 349×175×285 mm, + terminal on the right.

**Category:** [Truck Batteries](https://baterias.com/gb/batteries-for-truck) → [VARTA](https://baterias.com/gb/varta)

- **Canonical URL**: https://baterias.com/gb/battery-varta-j1-12v-125ah-720a
- **Language**: en-GB
- **Brand**: VARTA
- **Reference**: BCOM-VARTA-J1
- **EAN**: 4016987166499
- **MPN**: J1
- **Price**: 120,40 €
- **Stock**: In stock

## Technical specifications

| Feature | Value |
|---|---|
| Brand | VARTA |
| Reference | J1 |
| Model | ProMotive SLI (antes ProMotive HD) |
| Voltage (V) | 12 V |
| Largo | 349 mm |
| Ancho | 175 mm |
| Alto | 290 mm |
| Peso | 31.22 kg |
| Tecnología | Lead-acid |
| EAN | 4016987166499 |
| Terminal layout | Positive terminal on the right |
| Terminal type | 1 |
| Hold down | B00 |
| Cold cranking amps (EN) | 720 A |
| Capacity (C20) | 125 Ah (c20) |
| ETN | 625012072A742 |

## Quick description

**Varta J1 12V 125Ah 720A** is an SHD (Super Heavy Duty) truck battery for intensive professional use. Vibration-resistant, withstands long cold-diesel cranks and deep discharges during parking with active loads (tachograph, refrigeration, heater).

## Why this truck battery?

- **True Heavy Duty** built for intensive professional use
- **Long cold-diesel cranks** reliable even in extreme cold
- **Powers services at idle** tachograph, heater and lights with engine off

🔌 Voltage
12 V

⚡ Capacity
125 Ah C20

🔋 Cold cranking
720 A EN-1

📏 Dimensions
349×175×285 mm

⚙️ Technology
Lead-acid

🧭 Polarity
Positive on the right

⚖️ Weight
30,43 kg

🏷️ Model
ProMotive SLI

## Description

## Varta J1 ProMotive SLI (formerly ProMotive HD) 125Ah 720A 12V Lorry Battery

12*V* Voltage
125*Ah* Capacity
720*A* Cold cranking
31.22*kg* Weight

The **Varta J1 lorry battery** is the **12 V**, **125 Ah** model delivering **720 A** of cold cranking power (EN), from Varta's **ProMotive SLI (formerly ProMotive HD)** range, designed for lorries, buses, large vans and machinery. Measuring 349 × 175 × 290 mm with the positive terminal on the right, it is the direct replacement for lorries that leave the factory with a 125 Ah battery in this format.
- Withstands the vibration of thousands of kilometres on the road.
- High cranking current for large-capacity diesel engines.
- Dependable through repeated starts and while powering cab equipment.
- Reinforced grids and casing for the severe demands of haulage.

### Vehicles compatible with the Varta J1 battery

The Varta J1 is compatible with more than 511 vehicles: it is fitted as standard or as a replacement by makes such as J C Bamford (jcb), JCB, Massey Ferguson, Fiat, Volvo and Atlas. It is a benchmark choice when you need a **battery for a J C Bamford (jcb)**, a JCB or other models built around this same format. The compatibility list also includes models from Case, Matbro, Holman, Aveling Barford, International-Harvester, Allis-Chalmers, Ford and Case International.

### Format and fitting of the Varta J1

In format, the Varta J1 measures 349 × 175 × 290 mm (length × width × height) and weighs 31.22 kg. The positive terminal on the right determines which side the cables end up on: this is the detail behind more wrong purchases than any other, so it is worth checking before you order. It takes a B00 hold-down and terminal 1, 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 J1 and the ProMotive SLI range

The **ProMotive SLI** series is Varta's starter line for professional transport, bringing the former ProMotive HD and SHD together under a single name. It is built to crank large-capacity diesel engines and to take the daily punishment of the lorry, the bus and site machinery.
The key to this range is sheer toughness: reinforced plates and mountings that resist thousands of kilometres of vibration and deep discharge cycles, keeping fleet downtime from starting failures to a minimum.
Commercial vehicles demand high cranking current and endurance against the vibration of thousands of kilometres. This series uses reinforced grids and a robust construction to cope with repeated starts of large diesel engines and with the draw of the cab's auxiliary equipment. *This battery used to belong to Varta's **ProMotive HD** or **ProMotive SHD** range; following the brand's commercial renaming (2025), it now forms part of the new **ProMotive SLI** series.*

### Why choose a Varta battery

Choosing Varta means sticking with the reference the vehicle manufacturer itself signed off in the first place. Against own-brand batteries, the difference is not the purchase price but how many winters the battery lasts before it leaves you stranded.
Varta batteries are made under the Clarios group with German technology and quality controls that make them one of the best-selling choices in Europe. As a lead battery, it is 100% recyclable through any collection point.
Varta's production combines automated lines with verification of more than 100 parameters per unit; that traceability is what underpins its reputation for reliable starting throughout the battery's life.

### Manufacturer's warranty

The Varta J1 battery comes with the **official manufacturer warranty**. An important warning for commercial vehicles: most lorries run **two batteries connected in series** (a 24 V installation). If you replace only one, the new battery ends up working alongside the old one — which has already lost capacity and has higher internal resistance — and that imbalance means one overcharges while the other falls short, shortens the life of the new unit and may be treated by the manufacturer as improper use, **voiding the warranty**. That is why it is always advisable to change **both batteries at the same time**.

### Care and maintenance

In professional use, checking the state of charge and the battery hold-down regularly prevents breakdowns on the road. Vibration and the high temperatures of the engine bay are what shortens a battery's life most, so secure mounting is key. Keeping the terminals clean and tight and checking the charging system extends battery life in vehicles that clock up long hours. A well-maintained battery reduces the risk of downtime caused by a battery that will not start the engine.

### Technical sheet

Download the official technical sheet for this battery with all the manufacturer data.
[Download technical sheet (PDF)](/fichastecnicas/data-sheet-battery-varta-j1-125ah-720a-12v-en.pdf)

## Frequently asked questions

### How is the Varta J1 battery installed in the vehicle?

In most trucks 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 trucks with Start-Stop or BMS, register the battery via OBD so the alternator applies the correct charging profile.

### How long does the Varta J1 battery last?

Expected lifespan of the Varta J1 is 4 to 6 years in regular truck use without Start-Stop. 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 J1 battery?

Dimensions (length × width × height) are 349×175×285 mm — also written as 349x175x285 mm — following the European DIN standard. Always measure the space in your truck before buying: even one extra millimetre can prevent the hold-down clamp from closing. The height shown includes the terminals.

### Will the Varta J1 battery fit my truck?

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 J1 fits 276 verified vehicle versions in our database.

### Which batteries are equivalent to the Varta J1?

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 trucks. See the "Equivalents" section to view recommended options at the same performance level.


## Compatible vehicles

This battery fits 276 vehicles. Most searched:

- [J C BAMFORD (JCB) 500 (1990)](https://baterias.com/gb/batteries-for-construction-and-agricultural-machinery/j-c-bamford-jcb/500)
- [J C BAMFORD (JCB) 3CX Series (1990)](https://baterias.com/gb/batteries-for-construction-and-agricultural-machinery/j-c-bamford-jcb/3cx-series)
- [J C BAMFORD (JCB) 400 (1990)](https://baterias.com/gb/batteries-for-construction-and-agricultural-machinery/j-c-bamford-jcb/400)
- [JCB Others (1990)](https://baterias.com/gb/batteries-for-construction-and-agricultural-machinery/jcb/others)
- [MASSEY FERGUSON MF-Serie (1990)](https://baterias.com/gb/batteries-for-construction-and-agricultural-machinery/massey-ferguson/mf-serie)
- [BEDFORD TL-Serie (1990)](https://baterias.com/gb/batteries-for-truck/bedford/tl-serie)
- [DODGE Others (1990)](https://baterias.com/gb/batteries-for-truck/dodge/others)
- [MASSEY FERGUSON MF Series (1990)](https://baterias.com/gb/batteries-for-construction-and-agricultural-machinery/massey-ferguson/mf-series)
- [ERF |others (1990)](https://baterias.com/gb/batteries-for-truck/erf/others)
- [JCB 800-Serie (1990)](https://baterias.com/gb/batteries-for-construction-and-agricultural-machinery/jcb/800-serie)
- [MASSEY FERGUSON MF 800 (1990)](https://baterias.com/gb/batteries-for-construction-and-agricultural-machinery/massey-ferguson/mf-800)
- [BEDFORD TM-Serie (1990)](https://baterias.com/gb/batteries-for-truck/bedford/tm-serie)
- [ATLAS XA (1990)](https://baterias.com/gb/batteries-for-construction-and-agricultural-machinery/atlas/xa)
- [FORD CARGO II (2003)](https://baterias.com/gb/batteries-for-truck/ford/cargo-ii)
- [SEDDON ATKINSON |others (1990)](https://baterias.com/gb/batteries-for-truck/seddon-atkinson/others)

## Equivalent batteries

- [EXIDE EG1250](https://baterias.com/gb/battery-exide-eg1250-12v)
- [TUDOR TG1250](https://baterias.com/gb/battery-tudor-tg1250-12v-125ah-760a)

## Technical team (editorial authorship)

The FAQs, guides and comparisons on this site are reviewed by the baterias.com technical team — automotive battery specialists since 2015.

→ https://baterias.com/gb/technical-team

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*baterias.com — Automotive batteries · 2026-10-09*