Varta I1 Dynamic SLI · Car battery 110Ah 920A

Steps: 1) switch off and remove the key; 2) find the battery (bonnet, boot or under a seat); 3) undo the negative (−), then the positive (+); 4) remove the clamp and the old battery; 5) fit the new one facing the same way (positive on the right) to match the polarity; 6) connect the positive (+) and finally the negative (−). With a 10 mm spanner, swapping in the Varta I1 takes 15 to 30 minutes on most cars; if the battery sits in the boot or under a seat, allow up to twice as long. For the detail, read our guide to replacing the car battery and, if in doubt, the owner's handbook or a main dealer.

Estimated lifespan of the Varta I1: 4 to 6 years in regular car use without Start-Stop. Treat it as an approximate guide, as every case is different. It can vary considerably with usage (short or long journeys), temperature, the condition of the alternator and charging system, power drawn with the engine off and maintenance, plus the car itself and Start-Stop. Cold demands more at every start and intense heat evaporates the electrolyte.

Measure your car's battery tray first; if the battery exceeds it by even a millimetre, the hold-down clamp may not close. Length × width × height: 393x175x190 mm (L6 case). Height is measured to the top of the terminals. Hold-down: B13.

The I1 has the positive on the right in a L6 case: that is its polarity. It must match your current battery: reversed polarity means lengthening cables or reconfiguring the system, with a risk of short circuit. Face the battery with its terminals nearest you and see which side the positive post (+, red ring) is on.

Its EAN-13 barcode is 4016987167465. The ETN, the European identifier in parts catalogues, is 6104020923162, also written 610 402 092; and the manufacturer's reference is I1. It belongs to the Varta Dynamic SLI range. Any of them pins down this exact battery.

Not sure? Try your number plate in the finder (DGT/DVLA/KBA detect model and engine) or the "Compatible vehicles" tab, checked by our technical team; if your car is not there, send us make, model, engine and year on WhatsApp and we will reply during business hours (Mon–Fri 10:00–13:30 and 16:30–18:00 (Spanish time, CET)). The I1 fits 80 verified vehicle versions in our database. If our table and the car handbook disagree, go with what the manufacturer says.

Interchangeable means the same dimensions, same polarity, same Ah and same CCA; for the I1, 110 Ah (920 A cranking). The "Equivalents" section of this page gathers the recommended options with equivalent performance; remember that in Start-Stop cars an EFB should not be replaced with a conventional battery.

It is the AGM of the same case: more cold cranking, faster charging and far more resistance to cycling and heat than the I1. Compared with the I1 it has 5 Ah less and 30 A of cold cranking more. It costs €65.60 more. Mandatory if the original was AGM; in a car without Start-Stop the I1 does the job and AGM is a bonus in cranking and durability, not a necessity.

It is the EFB version of the same case: it withstands far more start cycles than the I1. Compared with the I1 it has 5 Ah less and 30 A of cold cranking more. It costs €56.50 more. You need it if the original battery label says EFB; in a car without Start-Stop the I1 does the job and EFB only adds service life.