# Caravan battery Optima YTR-5.0 12V 66Ah 845A AGM ![Caravan battery Optima YTR-5.0 12V 66Ah 845A AGM](https://baterias.com/4348-home_default/battery-optima-yt-r-50-12v-66ah-845a-845a.jpg) > Optima YTR-5.0 caravan battery 12V 66Ah 845A AGM. YELLOW TOP range. Dimensions 309×172×219 mm, + terminal on the right. For your on-board services. **Category:** [Batteries for Caravans](https://baterias.com/gb/batteries-for-caravans) → [OPTIMA](https://baterias.com/gb/optima) - **Canonical URL**: https://baterias.com/gb/battery-optima-yt-r-50-12v-66ah-845a-845a - **Language**: en-GB - **Brand**: OPTIMA - **Reference**: BCOM-OPTIMA-YTR-5.0 - **EAN**: 4016987141038 - **MPN**: YTR-5.0 - **Price**: 261,70 € - **Stock**: Out of stock ## Technical specifications | Feature | Value | |---|---| | Brand | OPTIMA | | Reference | YTR-5 | | Model | OPTIMA YELLOW TOP | | Voltage (V) | 12 V | | Capacity | 66 Ah (c20) | | Largo | 309 mm | | Ancho | 172 mm | | Alto | 219 mm | | Peso | 20.6 kg | | Tecnología | AGM ESPIRAL | | Terminal layout | Positive terminal on the right | | Terminal type | 1 | | Hold down | B1 | | Cold cranking amps (EN) | 845 | | Capacity (C20) | 66 | ## Quick description **Optima YTR-5.0 12V 66Ah 845A** is a leisure battery for campers, motorhomes and caravans. Designed to power the entire interior kit (fridge, heater, water pump, USB, LED lighting) for several days off-grid, with no need to plug into a campsite hookup. ### Why this caravan battery? - **Real off-grid autonomy** no campsite hookup needed - **Lasts the whole season** handles daily discharges without capacity loss - **Powers it all at once** fridge, water pump, LED and USB without issues 🔌 Voltage 12 V ⚡ Capacity 66 Ah C20 🔋 Cold cranking 845 A EN-1 📏 Dimensions 309×172×219 mm ⚙️ Technology AGM ESPIRAL 🧭 Polarity Positive on the right ⚖️ Weight 20,6 kg 🏷️ Model OPTIMA YELLOW TOP ## Description ## Leisure battery Optima YTR-5.0 Yellow Top 66Ah 845A 12V 12*V* Voltage 66*Ah* Capacity 845*A* Cold cranking 20.60*kg* Weight The **12 V**, **66 Ah** **Optima YTR-5.0** battery from the **Yellow Top** range with spiral-cell AGM technology is designed for motorhomes, caravans and campers that need power off-grid. It replaces the original battery without adaptation in motorhomes and caravans with a 309 × 172 × 219 mm format: same 66 Ah capacity and the positive terminal on the right. - Sealed and gas-free: suitable for installation inside the living area. - Low self-discharge during months of storage. - Spiral cells: maximum vibration resistance and very powerful cranking. - Power for fridge, lighting, water pump and USB off-grid. ### Size, terminals and hold-down of the Optima YTR-5.0 The Optima YTR-5.0 is made in the 309 × 172 × 219 mm format and weighs 20.60 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. Checking the three dimensions and the terminal position before buying avoids the most common mistake when replacing a battery. ### What the Optima YTR-5.0 is for With 66 Ah, the Optima YTR-5.0 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 20.60 kg, 1 terminals and B1 hold-down. ### The Optima YTR-5.0: Yellow Top range and spiral-cell AGM technology The YTR-5.0 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. Spiral AGM construction winds the plates into cylindrical pure-lead cells: maximum active surface, extreme vibration resistance and cranking current far above a battery of the same size. ### What Optima does differently Optima makes spiral-cell (SpiralCell) AGM batteries with pure lead: maximum vibration resistance, very powerful cranking and a durability recognised in 4x4, motorsport, marine and car audio. We guarantee that every Optima arrives new, charged and with the manufacturer's full warranty. ### Manufacturer's warranty The Optima YTR-5.0 comes with the **manufacturer's official warranty** against manufacturing defects. Avoid repeated full discharges: they shorten its life and are not covered. ### Usage and maintenance tips 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. Avoid routinely discharging the leisure battery below 50% and recharge it fully after every trip. ### When you get it and how to return it Order **before [[ks:cutoff]]** 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 **[[ks:return_days]] days** to return it if it has not been installed, with free collection on the mainland, and shipment tracking by email. ## Frequently asked questions ### Is the Optima YTR-5.0 an AGM battery and what are the benefits of AGM? Yes. The YTR-5.0 from Optima uses AGM (Absorbent Glass Mat) technology: a sealed lead-acid battery where the electrolyte is absorbed in a glass-fibre mat. It withstands more charge/discharge cycles than a conventional one, handles heat better and is the required technology for caravans with advanced Start-Stop and regenerative braking. Expected lifespan: 5-8 years under normal conditions. ### How do I fit the YTR-5.0 model in my caravan? In most caravans it fits in 15-30 minutes with a 10 mm wrench; if the battery is under the seat or in the boot the time can double. See the step-by-step guide on this page. Quick summary: 1) switch off the engine and remove the key; 2) locate the original battery (engine bay, boot or under seat); 3) disconnect the negative (−) terminal first, then the positive (+); 4) loosen the hold-down clamp and remove the old battery; 5) fit the new one in the same orientation — match the polarity shown on the product sheet; 6) connect the positive (+) first, then the negative (−). On caravans with Start-Stop or BMS, register the battery via OBD so the alternator applies the correct charging profile. ### How long does the Optima YTR-5.0 battery last? Expected lifespan of the Optima YTR-5.0 is 5 to 8 years in mild-climate caravan use with Start-Stop. In cold regions it drops slightly due to cold-start stress; in very hot regions it also drops because of electrolyte evaporation. To extend its life: avoid deep discharges (headlights on with engine off), have the alternator checked yearly, and keep the battery clean and properly secured. ### What are the dimensions of the Optima YTR-5.0 battery? Dimensions (length × width × height) are 309×172×219 mm — also written as 309x172x219 mm — following the European DIN standard. Always measure the space in your caravan before buying: even one extra millimetre can prevent the hold-down clamp from closing. The height shown includes the terminals. ### Will the Optima YTR-5.0 battery fit my caravan? Three options to confirm: 1) enter your number plate in the finder (DGT/DVLA/KBA auto-detect your model and engine); 2) check the "Compatible vehicles" tab on this page, where we list every vehicle verified by our technical team; 3) if you cannot find your model, message us on WhatsApp with brand, model, engine and year — we reply during business hours (Mon–Fri 10:00–13:30 and 16:40–18:00 (Spanish time, CET)). The YTR-5.0 fits 4 verified vehicle versions in our database. ### Which batteries are equivalent to the Optima YTR-5.0? Directly interchangeable batteries (same dimensions, same polarity, same Ah and CCA) are the OEM equivalents from leading brands: Bosch, Tudor, Exide and, depending on the model, Banner or Yuasa. Exact equivalence depends on technology — an EFB cannot be replaced with a conventional battery in Start-Stop caravans. See the "Equivalents" section to view recommended options at the same performance level. ## Compatible vehicles This battery fits 4 vehicles. Most searched: - [TOYOTA SEQUOIA (\_K6\_) (2007)](https://baterias.com/gb/car-batteries/toyota/sequoia-_k6) - [TOYOTA TUNDRA Pickup (\_K5\_, \_K6\_) (2006)](https://baterias.com/gb/car-batteries/toyota/tundra-pickup-_k5_-_k6) - [TOYOTA TUNDRA Pickup (\_K3\_, \_K4\_) (1999)](https://baterias.com/gb/car-batteries/toyota/tundra-pickup-_k3_-_k4) ## Reviews - **Average rating**: 4.82 / 5 (30 reviews) ## Technical team (editorial authorship) The FAQs, guides and comparisons on this site are reviewed by the baterias.com technical team — over 25 years of experience validating automotive batteries. → https://baterias.com/gb/technical-team --- *baterias.com — Automotive batteries · 2026-09-29*