# Car battery Optima YTS-2.1 Yellow Top 6V 55Ah 765A AGM ![Car battery Optima YTS-2.1 Yellow Top 6V 55Ah 765A AGM](https://baterias.com/3845-home_default/battery-optima-yellow-top-yts-21-8018-356-12v-55ah.jpg) > Optima YTS-2.1 car battery 6V 55Ah 765A AGM. YELLOW TOP range. Dimensions 255×90×206 mm, + terminal on the left. Check fitment by plate. **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-yellow-top-yts-21-8018-356-12v-55ah - **Language**: en-GB - **Brand**: OPTIMA - **Reference**: BCOM-OPTIMA-YTS-2.1 - **EAN**: 4016987124093 - **MPN**: YTS-2.1 - **Price**: 161,40 € (VAT incl., Spain) - **Last updated**: 2026-10-28 - **Stock**: In stock ## Technical specifications | Feature | Value | |---|---| | Brand | OPTIMA | | Reference | YTS-2.1 | | Model | OPTIMA YELLOW TOP | | Voltage (V) | 6 V | | Largo | 252 mm | | Ancho | 90 mm | | Alto | 185 mm | | Peso | 8.9 kg | | Tecnología | AGM ESPIRAL | | EAN | 4016987124093 | | Terminal layout | 1 | | Terminal type | 1 | | Cold cranking amps (EN) | 765 A | | Capacity (C20) | 55 Ah (c20) | | Capacity (C5) | 52 Ah (c5) | | ETN | 8183560008882 | ## Quick description **Optima YTS-2.1 6V 55Ah 765A** is a battery designed for classic and vintage vehicles. It holds steady voltage in older 6 V systems, starts reliably after long spells parked in the garage and keeps the engine bay looking original. ## Why this car battery? - **Original-equipment quality** without dealership prices - **Lasts 4 to 6 years** buy once instead of twice - **Real human tech support** if you have any doubts before buying 🔌 Voltage 6 V ⚡ Capacity 55 Ah C20 🔋 Cold cranking 765 A EN-1 📏 Dimensions 255×90×206 mm ⚙️ Technology AGM ESPIRAL 🧭 Polarity Positive on the left ⚖️ Weight 10,6 kg 🏷️ Model OPTIMA YELLOW TOP ## Description ## Leisure battery Optima YTS-2.1 Yellow Top 55Ah 765A 6V 6*V* Voltage 55*Ah* Capacity 765*A* Cold cranking 8.90*kg* Weight The **Optima YTS-2.1** with spiral-cell AGM technology stores **55 Ah** at **6 V**: autonomy for motorhomes, caravans and campers that need power off-grid. Measuring 252 × 90 × 185 mm and the positive terminal on the left, it is the direct replacement for motorhomes and caravans fitted from the factory with a 55 Ah battery of this format. - Recharges from the alternator, a solar panel or a mains charger. - Direct replacement for the original leisure battery. - Spiral AGM construction, sealed and mountable in any position. - Withstands daily discharges throughout the season. ### What the Optima YTS-2.1 is for With 55 Ah, the Optima YTS-2.1 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 8.90 kg and 1 terminals. ### Will it fit your current battery tray? The Optima YTS-2.1 is made in the 252 × 90 × 185 mm format and weighs 8.90 kg. The positive terminal on the left decides which side the cables end up on: it is the detail that causes most buying mistakes, so check it before ordering. It uses 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. ### The Optima YTS-2.1: Yellow Top range and spiral-cell AGM technology The YTS-2.1 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. ### Optima: the maker behind the YTS-2.1 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. ### Warranty and coverage The Optima YTS-2.1 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. ### Shipping, delivery and returns Same-day dispatch from our warehouse for in-stock orders placed **before 6:00 pm**: 24-48 working hours in mainland Spain and Portugal, 3 to 5 days in the islands and the rest of Europe. Returns are accepted for **14 days** if the battery has not been used (free collection on the Iberian mainland). You will receive tracking by email. ## Frequently asked questions ### Is the Optima YTS-2.1 an AGM battery and what are the benefits of AGM? Yes. The Optima YTS-2.1 is AGM (Absorbent Glass Mat): sealed lead-acid, with the electrolyte absorbed in glass fibre. It withstands more cycles than a conventional battery and copes better with heat. ### How much energy does this battery give a caravan? It stores about 330 Wh. To make it last, it should not be discharged below half, so you have about 165 Wh usable: for example, an average load of 50 W for about 3 hours. ### Can it be charged with solar panels? Yes, with a charge controller (PWM or MPPT) set for AGM. It can also be charged by the vehicle alternator (ideally with a DC-DC charger) and by the 230 V charger when you are on hook-up at the campsite. ### What size is this battery? Its dimensions are 255×90×206 mm, also written 255x90x206 mm; the height already includes the terminals. Check the room available in your caravan, because a single millimetre too much can stop the clamp from closing. ### Which side is the positive terminal on this battery? On the Optima YTS-2.1, the polarity is positive on the left. To check, stand the battery in front of you with the terminals nearest you: the positive (+) is the one with the red ring. Compare it with the battery you are replacing: if it does not match, cables must be lengthened or the system reconfigured, with a risk of short circuit. ### Under which reference is the Optima YTS-2.1 listed in catalogues? Three codes identify this Optima: MPN YTS-2.1, ETN 8183560008882 (short form 818 356 000, the European parts-catalogue identifier) and EAN-13 4016987124093. It belongs to the OPTIMA YELLOW TOP range. Use them when asking for a quote or comparing prices. ## Compatible vehicles The Optima YTS-2.1 fits 1 vehicles (2 engine versions), including the Volkswagen EOS (1F7, 1F8) 3.2 V6 (184 kW / 250 CV) (2006–2015) and Volkswagen EOS (1F7, 1F8) 3.6 V6 (191 kW / 260 CV) (2006–2015). | Make | Model | Engine | Years | |---|---|---|---| | Volkswagen | EOS (1F7, 1F8) | [3.2 V6 (184 kW / 250 CV)](https://baterias.com/gb/car-batteries/volkswagen/eos-1f7-1f8/32-v6-184-kw-250cv) | 2006–2015 | | Volkswagen | EOS (1F7, 1F8) | [3.6 V6 (191 kW / 260 CV)](https://baterias.com/gb/car-batteries/volkswagen/eos-1f7-1f8/36-v6-191-kw-260cv) | 2006–2015 | ## Technical team (editorial authorship) The FAQs, guides and comparisons on this site are reviewed by the baterias.com technical team — automotive battery specialists since 2012. → https://baterias.com/gb/technical-team --- *baterias.com — Automotive batteries · 2026-11-10*