Brand
Leisure and motorhome batteries
Two batteries for the same kind of vehicle, at the same kind of job.
Not starting an engine. A starter battery delivers hundreds of amps for two seconds and hates being deeply discharged; a leisure battery delivers a few amps for hours and expects to be.
Using one for the other job shortens its life dramatically, and they look almost identical from the outside.
Absorbed glass mat — electrolyte held in a fibre separator rather than free liquid. Sealed, spill-proof, vibration-tolerant, and safe to mount in a living space in ways a flooded battery is not.
Cycle life at a stated depth of discharge. A battery quoted at a thousand cycles to 50 % and one quoted at four hundred to 80 % are not comparable until both numbers are on the table, and most listings publish one.
Where a capacity is given without the discharge rate it was measured at — which changes the answer by a noticeable margin.
120 Ah C100 at 12 V · AGM, sealed and gas-tight · over 600 cycles · suitable indoors · vibration-resistant · named for inverters and movers
A 12 V 120 Ah sealed AGM battery rated at the C100 hour rate and for over 600 cycles, described as gas-tight and therefore suitable for installation inside a vehicle.
Best for: A caravan needing more capacity than 100 Ah, where the tray has already been measured.
≈ €160
100 Ah at 12 V · AGM, sealed · terminal clamps, positive on the right, plus 19.5 mm / minus 17.9 mm · supplied filled and charged · 2-year warranty · 278 × 175 × 190 mm · 21.5 kg
A 12 V 100 Ah sealed AGM leisure battery supplied filled and charged, published with terminal post diameters and polarity, and explicitly stated not to be a starter battery.
Best for: A direct replacement in a caravan tray where the existing clamps must fit the new posts.
≈ €130
A price quoted in the text of a PowerVerdict page dates from the day that page was written; the live figure beside each product is fetched while you read and replaces it.
