Varta A9 | for engines that pause at junctions | 50Ah 12V 540A

Summary: Spec sheet headline for the Varta A9: 50Ah 12V 540A, made with start-stop vehicles in mind. Weight is 14.72 kg, worth knowing before you lift it out of the tray.

Technical figures at a glance

Fitting and everyday care

A car that only does short trips in town can leave its stop-start battery permanently half charged. After fitting, many makes need the new battery coded through the OBD port so the alternator charges it correctly. An auto-stop that hardly ever kicks in is usually the first hint of a tired battery.

Same size and layout

Cannot find the Varta A9 you want? These share the same size and terminal layout.

Varta N50Exide EL550Fulmen FL550Tudor TL550

Buying the Varta A9 online

Owners often look up the Varta A9 after a warning message about the battery. A rating of 50Ah 12V 540A sits alongside the technology, which matters just as much in these cars. Choosing batteries online by brand and reference leaves no room for a near miss.

For start-stop vehicles, 50Ah is on the compact side.

Frequently asked questions

Five checks for a perfect fit

• ✓ The capacity rating, 50Ah, should suit the consumers you run. Lots of electrical equipment calls for the higher end.
• ✓ Cold cranking current reaches 540A. It ought to equal the carmaker's requirement at minimum, more so for diesels in cold winters.
• ✓ As a AGM battery it needs matching charge settings in the alternator, charger or solar regulator.

See also

Keep the code A9 handy for next time: it makes reordering at baterias.online quick. Writing the fitting date on the battery helps when planning the next replacement.

• Other batteries for start-stop vehicles
• More from Varta

AGM: how it works

Open up an AGM battery in your imagination and you would find the acid soaked into thin glass-fibre sheets squeezed against each plate. Glass-mat batteries shrug off vibration, which is why bikes and boats use them so often. Never try to open an AGM battery to add water.