Optima RTR-4.2 | everyday motoring, hatchbacks to light vans | 50Ah 12V 815A

Quick answer: What you are looking at: the Optima RTR-4.2, a 50Ah 12V 815A battery for cars and vans. Compare the code on your old battery with RTR-4.2 before ordering.

Installation and maintenance tips

Drivers who work nights often start their cars in the coldest hours. Take the negative lead off first and put it back last when swapping the battery. A clicking noise when you turn the key is a familiar warning sign.

Optima RTR-4.2: dimensions and ratings

spiral-cell AGM: how it works

The unusual shape is the giveaway of a spiral-cell battery. Angled or even sideways mounting is possible with many spiral designs. Choose the right type for starting or deep cycling.

Your questions answered

Optima RTR-4.2: what it is and who it suits

Everyday cars and vans of many makes run on a battery coded Optima RTR-4.2. Low-maintenance construction means no topping up for most owners. With the old battery's label in your hand, finding its match at baterias.online is straightforward.

50Ah puts it squarely in the middle of the range for cars and vans. 815A beats many larger batteries for cranking.

Related products and ranges

Keep the code RTR-4.2 handy for next time: it makes reordering at baterias.online quick. A tidy, clean tray gives the new battery a better start.

• Compare alternatives for cars and vans
• All Optima products on baterias.online

Before you order: a quick checklist

• ✓ Technology to match: spiral-cell AGM. Moving to a different chemistry may need settings changed in your system.
• ✓ A case of 254 × 175 × 200 mm must sit flat with the clamp closed.
• ✓ Terminal layout: positive on the right-hand side. If your original is the mirror image, choose another reference rather than stretching the leads.