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

Quick answer: Spec sheet headline for the Optima RTR-4.2: 50Ah 12V 815A, made with cars and vans in mind. Measure twice, order once: dimensions decide most swaps.

Technical figures at a glance

Getting the best from the Optima RTR-4.2

An old car that has never had a new battery is often running on borrowed time. If the car does mostly short hops, a smart charger once a month makes a real difference. A battery that needs a jump after a weekend parked has lost too much capacity.

Why choose the Optima RTR-4.2

Some drivers know their battery only as the Optima RTR-4.2 written on an old invoice, and that is enough. On paper it reads 50Ah 12V 815A, which is what most drivers compare first. Typing a part number takes less time than describing a battery over the phone.

50Ah sits in the comfortable middle for cars and vans. 815A of cold cranking current is strong for a battery of this size.

Questions and answers

Quick compatibility checklist

• ✓ Set your charger to spiral-cell AGM before the first charge.
• ✓ Grab a tape measure: 254 × 175 × 200 mm is what this case needs.
• ✓ Mirror-image layouts exist; this one is positive on the right-hand side.

Related products and ranges

Ordering online at baterias.online is the quick part once the checks are done. Note the fitting date somewhere you will find it again.

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spiral-cell AGM: how it works

Glass mats wrap the spiral plates like AGM. Boats use spiral cells because they cope with pounding seas. Check dimensions carefully due to the unusual shape.