Fulmen FG1250 · Truck battery 12V 125Ah 760A

Truck battery Fulmen FG1250 StartPRO 125Ah 760A 12V

With 125 Ah and 760 A of cold cranking current (EN), the Fulmen FG1250 from the StartPRO range is built for professional use in trucks, buses, tractors and heavy machinery. It measures 349 × 175 × 285 mm and the positive terminal on the right, the format sought by anyone replacing a 125 Ah battery in trucks.

In short: the Fulmen FG1250 (125 Ah, 760 A, 349 × 175 × 285 mm, positive terminal on the right). Verified equivalent alternatives: Varta J1 and Tudor TF1420.

• Designed for 24 V installations with two batteries in series.
• Powerful cold cranking for large-displacement diesel engines.
• Heavy Duty construction for intensive professional use.
• Conventional lead-acid: the most proven and economical technology.

What the Fulmen FG1250 is for

The Fulmen FG1250 is designed for trucks, buses, tractors and heavy machinery. In 24 V installations with two batteries in series, replace both at the same time to avoid imbalance. Check that it matches your current battery in dimensions, terminals and hold-down: this reference has a weight of 29.50 kg and B00 hold-down.

Will it fit your current battery tray?

It has external dimensions of 349 × 175 × 285 mm and weighs 29.50 kg. The positive terminal on the right decides which side the cables end up on: it is the detail that causes most buying mistakes, so check it before ordering. It uses a B00 hold-down, the system that anchors and connects it in the vehicle. Before replacing it, measure your current battery tray: if all three dimensions and the terminal positions match, the swap is direct and needs no adapters.

Why choose Fulmen batteries

With more than a century of history, Fulmen offers complete ranges for cars, trucks, motorcycles and leisure with the industrial quality of the Exide group. All the Fulmen batteries in our catalogue are genuine product, recently manufactured and covered by the manufacturer's warranty.

The Fulmen FG1250: StartPRO range and conventional lead-acid technology

The FG1250 is part of the Fulmen StartPRO range. Choosing the right reference within the series comes down to capacity, dimensions and terminals: technology and quality are common to the whole family.

In a conventional battery the electrolyte is liquid and the lead plates are immersed in it. It is a mature, economical and easily recycled technology, ideal for starting vehicles in normal use.

How to make it last longer

In 24 V installations, check periodically that both batteries show the same voltage; an imbalance means one is failing. On batteries with filler caps, check the electrolyte level and top up only with distilled water.

Warranty and coverage

The Fulmen FG1250 comes with the manufacturer's official warranty against manufacturing defects. An important note for commercial vehicles: most trucks use two batteries connected in series (24 V installation). If you replace only one, the new battery works alongside the old one, which has already lost capacity; that imbalance shortens its life and the manufacturer may treat it as misuse. Always replace both at the same time.

Shipping, delivery and returns

Same-day dispatch from our warehouse for in-stock orders placed before 6:00 pm: 24-48 working hours in mainland Spain and Portugal, 3 to 5 days in the islands and the rest of Europe. Returns are accepted for 14 days if the battery has not been used (free collection on the Iberian mainland). You will receive tracking by email.