Batteries and charging
Starter and leisure batteries, chargers, jump starters and EV charging. Match a new battery to the old one on capacity (Ah), cranking current (A) and terminals. On the shelf: Exide, Bosch and VARTA.
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Batteries and chargers to start with
How to choose a battery
Capacity (Ah) tells you how much energy the battery stores, and cranking current (A) how strongly it turns over a cold engine. Take the capacity the carmaker specifies or slightly more, and a cranking current no lower than the old battery's. In an Estonian winter it does not pay to save on cranking current.
A car with start-stop needs an EFB or AGM battery. If it left the factory with AGM, replace it with AGM too: an EFB or standard battery wears out quickly in such a car. A car with EFB takes EFB or AGM. On many newer cars the new battery also has to be registered with a diagnostic tool.
Before you buy, measure the length, width and height of the old battery and check which side the positive terminal is on. In the "Terminal layout" filter, pick the side the positive is on in your old battery, looking at it from the terminal side. Also check the bottom ledge that holds the battery to its tray.
Frequently asked questions
Usually yes, as long as it fits the tray, the terminals are on the same side and the hold-down fits. The alternator charges a slightly larger battery too. A much larger battery, however, can stay undercharged on short trips, so do not stray far from the factory value.
A car battery is usually well served by a 4-10 A smart charger that also handles AGM and EFB batteries and can keep the battery on maintenance charge over winter. A small motorcycle or lawnmower battery needs only 1-2 A. A lithium battery needs a charger with a lithium mode.
No. A jump starter gives a car with a flat battery a short burst of cranking current to get the engine running, but it does not charge the battery. If the battery keeps going flat, charge it fully with a charger and have it tested. For a large diesel engine, choose a jump starter with a higher peak current.