Optima YTR-3.7 Yellow Top · Caravan battery 48Ah 660A AGM

Leisure battery Optima YTR-3.7 Yellow Top 48Ah 660A 12V

The Optima YTR-3.7 with spiral-cell AGM technology stores 48 Ah at 12 V: autonomy for motorhomes, caravans and campers that need power off-grid. Its 237 × 172 × 168 mm and the positive terminal on the right make it the exact replacement for the 48 Ah battery fitted as standard to many motorhomes and caravans.

• Direct replacement for the original leisure battery.
• Recharges from the alternator, a solar panel or a mains charger.
• Withstands daily discharges throughout the season.
• Spiral AGM construction, sealed and mountable in any position.

What the Optima YTR-3.7 is for

With 48 Ah, the Optima YTR-3.7 is the habitation battery for motorhomes, caravans and campers that need power off-grid. It recharges from the alternator, a solar panel or a mains charger. Check that it matches your current battery in dimensions, terminals and hold-down: this reference has a weight of 17 kg, 1 terminals and B1 hold-down.

Will it fit your current battery tray?

In terms of format, the Optima YTR-3.7 measures 237 × 172 × 168 mm (length × width × height) and weighs 17 kg. The positive terminal on the right decides which side the cables end up on: it is the detail that causes most buying mistakes, so check it before ordering. It uses a B1 hold-down and 1 terminals, the system that anchors and connects it in the vehicle. For a direct replacement, the current battery tray must accept these dimensions and the same terminal layout; otherwise adapters will be needed or the hold-down will change.

What Optima does differently

The Optima Red, Yellow and Blue Top are references for high-performance starting, deep cycling and marine use respectively, all with the characteristic six spiral-cell design. All the Optima batteries in our catalogue are genuine product, recently manufactured and covered by the manufacturer's warranty.

The Optima YTR-3.7: Yellow Top range and spiral-cell AGM technology

The YTR-3.7 is part of the Optima Yellow Top range. Choosing the right reference within the series comes down to capacity, dimensions and terminals: technology and quality are common to the whole family.

In a spiral-cell battery the electrolyte is absorbed and the plates are wound under pressure. That lets it deliver very high current peaks, recharge quickly and be mounted in any position.

Care and maintenance

Avoid routinely discharging the leisure battery below 50% and recharge it fully after every trip. During months of storage, keep it charged with a mains charger or a small solar panel; a battery left discharged for weeks loses capacity permanently.

Official warranty

The Optima YTR-3.7 comes with the manufacturer's official warranty against manufacturing defects. Avoid repeated full discharges: they shorten its life and are not covered.

Delivery times and returns

Order before 6:00 pm with stock available and it leaves today: mainland Spain and Portugal receive it in 24-48 working hours, the islands and the rest of the EU in 3 to 5 days. You have 14 days to return it if it has not been installed, with free collection on the mainland, and shipment tracking by email.