# Auxiliary battery Optima YTR-2.7 Yellow Top 12V 38Ah 460A AGM ![Auxiliary battery Optima YTR-2.7 Yellow Top 12V 38Ah 460A AGM](https://baterias.com/3837-home_default/battery-optima-yellow-top-ytr-27-8073-176-12v-38ah.jpg) > Optima YTR-2.7 auxiliary battery 12V 38Ah 460A AGM. YELLOW TOP range. Dimensions 237×129×227 mm, + terminal on the right. 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-ytr-27-8073-176-12v-38ah - **Language**: en-GB - **Brand**: OPTIMA - **Reference**: BCOM-OPTIMA-YTR-2.7 - **EAN**: 4016987113639 - **MPN**: YTR-2.7 - **Price**: 214,50 € (VAT incl., Spain) - **Last updated**: 2026-10-28 - **Stock**: Out of stock ## Technical specifications | Feature | Value | |---|---| | Brand | OPTIMA | | Reference | YTR-2.7 | | Model | OPTIMA YELLOW TOP | | Voltage (V) | 12 V | | Largo | 237 mm | | Ancho | 129 mm | | Alto | 201 mm | | Peso | 12.4 kg | | Tecnología | AGM ESPIRAL | | EAN | 4016987113639 | | Terminal layout | Positive terminal on the right | | Terminal type | 1 | | Cold cranking amps (EN) | 460 A | | Capacity (C20) | 38 Ah (c20) | | Capacity (C5) | 33 Ah (c5) | | ETN | 8731760008882 | ## Quick description **Optima YTR-2.7 12V 38Ah 460A** is an AGM support battery designed for daily cycling while keeping voltage stable for the vehicle systems. ## Why this auxiliary battery? - **Designed for Start-Stop** built for the intensive cycling of modern cars - **2 to 3 times longer life** vs fitting a cheap conventional battery - **Fast recovery** recharges in minutes once the engine is running 🔌 Voltage 12 V ⚡ Capacity 38 Ah C20 🔋 Cold cranking 460 A EN-1 📏 Dimensions 237×129×227 mm ⚙️ Technology AGM ESPIRAL 🧭 Polarity Positive on the right ⚖️ Weight 12,5 kg 🏷️ Model OPTIMA YELLOW TOP ## Description ## Leisure battery Optima YTR-2.7 Yellow Top 38Ah 460A 12V 12*V* Voltage 38*Ah* Capacity 460*A* Cold cranking 12.40*kg* Weight For motorhomes, caravans and campers that need power off-grid, the **Optima YTR-2.7** from the **Yellow Top** range provides **38 Ah** of energy with spiral-cell AGM technology. Measuring 237 × 129 × 201 mm and the positive terminal on the right, it is the direct replacement for motorhomes and caravans fitted from the factory with a 38 Ah battery of this format. - Spiral AGM construction, sealed and mountable in any position. - Withstands daily discharges throughout the season. - Recharges from the alternator, a solar panel or a mains charger. - Direct replacement for the original leisure battery. ### What the Optima YTR-2.7 is for As a leisure battery, the Optima YTR-2.7 is discharged and recharged every travelling day; avoid discharges below 50% to extend its life. Check that it matches your current battery in dimensions, terminals and hold-down: this reference has a weight of 12.40 kg and 1 terminals. ### Will it fit your current battery tray? In terms of format, the Optima YTR-2.7 measures 237 × 129 × 201 mm (length × width × height) and weighs 12.40 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 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. ### Optima: the maker behind the YTR-2.7 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. At baterias.com we work directly with the manufacturer or its official distributor: real stock, brand-new product and official warranty. ### The Optima YTR-2.7: Yellow Top range and spiral-cell AGM technology Within the Optima catalogue, the **Yellow Top** series groups the references designed for this use. The YTR-2.7 is the 38 Ah model of that family, with the same performance as its siblings in other sizes. 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. ### Care and maintenance Charge with a voltage-controlled AGM charger; a fully discharged pure-lead battery may need a specific charger to recover. 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-2.7 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. ## Frequently asked questions ### Is the Optima YTR-2.7 an AGM battery and what are the benefits of AGM? Yes. The Optima YTR-2.7 is AGM (Absorbent Glass Mat): sealed lead-acid, with the electrolyte absorbed in glass fibre. It tolerates heat better and handles more cycles than a conventional battery. ### How much energy does this battery give a caravan? It stores about 456 Wh. To make it last, it should not be discharged below half, so you have about 228 Wh usable: for example, an average load of 50 W for about 5 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 are the measurements of the YTR-2.7 model? Its dimensions are 237×129×227 mm, also written 237x129x227 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. ### What polarity does the Optima YTR-2.7 battery have? It has the positive on the right (polarity). It must match your current battery: reversed polarity means lengthening cables or reconfiguring the system, with a risk of short circuit. Put it in front of you, terminals towards you: the post with the red ring and the + sign is the positive. ### What ETN and EAN codes does the Optima YTR-2.7 battery have? Manufacturer part number (MPN): YTR-2.7. ETN code: 8731760008882 (short form 873 176 000), the European identifier used in parts catalogues. EAN-13 barcode: 4016987113639. It belongs to the OPTIMA YELLOW TOP range. Any of them identifies this exact battery. ### Optima YTR-2.7 or Exide EK454: which one to choose? Same case and same fitting as the YTR-2.7, from Exide. Compared with the YTR-2.7 it has 7 Ah more and 80 A of cold cranking less. It costs 2,10 € less. If you want to save or the YTR-2.7 is out of stock, it is the safe alternative: same dimensions, same polarity and official warranty. ### Optima YTR-2.7 or Tudor TK454: which one to choose? Same case and same fitting as the YTR-2.7, from Tudor. Compared with the YTR-2.7 it has 7 Ah more and 80 A of cold cranking less. It costs 2,10 € less. If you want to save or the YTR-2.7 is out of stock, it is the safe alternative: same dimensions, same polarity and official warranty. ## Compatible vehicles The Optima YTR-2.7 fits 2 vehicles (25 engine versions), including the Tesla Model 3 (5YJ3) EV AWD (366 kW / 498 CV) (2017–2025), Tesla Model 3 (5YJ3) EV AWD (324 kW / 441 CV) (2017–2025), Tesla Model 3 (5YJ3) EV AWD (361 kW / 491 CV) (2017–2025) and Tesla Model 3 (5YJ3) EV (220 kW / 299 CV) (2017–2025). | Make | Model | Engine | Years | |---|---|---|---| | Tesla | Model 3 (5YJ3) | [EV AWD (366 kW / 498 CV)](https://baterias.com/gb/car-batteries/tesla/model-3-5yj3/ev-awd-366-kw-498cv) | 2017–2025 | | Tesla | Model 3 (5YJ3) | [EV AWD (324 kW / 441 CV)](https://baterias.com/gb/car-batteries/tesla/model-3-5yj3/ev-awd-324-kw-441cv) | 2017–2025 | | Tesla | Model 3 (5YJ3) | [EV AWD (361 kW / 491 CV)](https://baterias.com/gb/car-batteries/tesla/model-3-5yj3/ev-awd-361-kw-491cv) | 2017–2025 | | Tesla | Model 3 (5YJ3) | [EV (220 kW / 299 CV)](https://baterias.com/gb/car-batteries/tesla/model-3-5yj3/ev-220-kw-299cv) | 2017–2025 | | Tesla | Model 3 (5YJ3) | [EV AWD (153 kW / 208 CV)](https://baterias.com/gb/car-batteries/tesla/model-3-5yj3/ev-awd-153-kw-208cv) | 2017–2025 | | Tesla | Model 3 (5YJ3) | [EV (208 kW / 283 CV)](https://baterias.com/gb/car-batteries/tesla/model-3-5yj3/ev-208-kw-283cv) | 2017–2025 | | Tesla | Model 3 (5YJ3) | [EV (175 kW / 238 CV)](https://baterias.com/gb/car-batteries/tesla/model-3-5yj3/ev-175-kw-238cv) | 2017–2025 | | Nissan | Leaf (ZE0) | [Electric (80 kW / 109 CV)](https://baterias.com/gb/car-batteries/nissan/leaf-ze0/electric-80-kw-109cv) | 2010–2017 | | Tesla | Model 3 (5YJ3) | [EV (192 kW / 261 CV)](https://baterias.com/gb/car-batteries/tesla/model-3-5yj3/ev-192-kw-261cv) | 2017–2025 | | Tesla | Model 3 (5YJ3) | [EV (239 kW / 325 CV)](https://baterias.com/gb/car-batteries/tesla/model-3-5yj3/ev-239-kw-325cv) | 2017–2025 | | Tesla | Model 3 (5YJ3) | [EV AWD (288 kW / 392 CV)](https://baterias.com/gb/car-batteries/tesla/model-3-5yj3/ev-awd-288-kw-392cv) | 2017–2025 | | Tesla | Model 3 (5YJ3) | [EV Performance AWD (377 kW / 513 CV)](https://baterias.com/gb/car-batteries/tesla/model-3-5yj3/ev-performance-awd-377-kw-513cv) | 2017–2025 | | Tesla | Model 3 (5YJ3) | [EV (202 kW / 275 CV)](https://baterias.com/gb/car-batteries/tesla/model-3-5yj3/ev-202-kw-275cv) | 2017–2025 | | Tesla | Model 3 (5YJ3) | [EV AWD (355 kW / 482 CV)](https://baterias.com/gb/car-batteries/tesla/model-3-5yj3/ev-awd-355-kw-482cv) | 2017–2025 | | Tesla | Model 3 (5YJ3) | [EV (225 kW / 306 CV)](https://baterias.com/gb/car-batteries/tesla/model-3-5yj3/ev-225-kw-306cv) | 2017–2025 | | Tesla | Model 3 (5YJ3) | [EV AWD (350 kW / 476 CV)](https://baterias.com/gb/car-batteries/tesla/model-3-5yj3/ev-awd-350-kw-476cv) | 2017–2025 | | Tesla | Model 3 (5YJ3) | [EV (188 kW / 256 CV)](https://baterias.com/gb/car-batteries/tesla/model-3-5yj3/ev-188-kw-256cv) | 2017–2025 | | Tesla | Model 3 (5YJ3) | [EV AWD (258 kW / 351 CV)](https://baterias.com/gb/car-batteries/tesla/model-3-5yj3/ev-awd-258-kw-351cv) | 2017–2025 | | Tesla | Model 3 (5YJ3) | [EV Performance AWD (461 kW / 627 CV)](https://baterias.com/gb/car-batteries/tesla/model-3-5yj3/ev-performance-awd-461-kw-627cv) | 2017–2025 | | Tesla | Model 3 (5YJ3) | [EV Performance AWD (340 kW / 462 CV)](https://baterias.com/gb/car-batteries/tesla/model-3-5yj3/ev-performance-awd-340-kw-462cv) | 2017–2025 | | Tesla | Model 3 (5YJ3) | [EV Performance AWD (339 kW / 461 CV)](https://baterias.com/gb/car-batteries/tesla/model-3-5yj3/ev-performance-awd-339-kw-461cv) | 2017–2025 | | Tesla | Model 3 (5YJ3) | [EV (357 kW / 485 CV)](https://baterias.com/gb/car-batteries/tesla/model-3-5yj3/ev-357-kw-485cv) | 2017–2025 | | Tesla | Model 3 (5YJ3) | [EV Perfomance AWD (393 kW / 534 CV)](https://baterias.com/gb/car-batteries/tesla/model-3-5yj3/ev-perfomance-awd-393-kw-534cv) | 2017–2025 | | Tesla | Model 3 (5YJ3) | [EV Performance AWD (338 kW / 460 CV)](https://baterias.com/gb/car-batteries/tesla/model-3-5yj3/ev-performance-awd-338-kw-460cv) | 2017–2025 | | Tesla | Model 3 (5YJ3) | [EV AWD (360 kW / 490 CV)](https://baterias.com/gb/car-batteries/tesla/model-3-5yj3/ev-awd-360-kw-490cv) | 2017–2025 | ## Equivalent batteries - [EXIDE EK454](https://baterias.com/gb/battery-exide-ek454-12v-45ah) - [TUDOR TK454](https://baterias.com/gb/battery-tudor-tk454-12v-45ah) ## Reviews - **Average rating**: 2 / 5 (1 reviews) Average rating 2/5 from 1 verified-purchase reviews (ks_recovery, unfiltered). The 3 most recent: - ★★ **José María L.** (2026-08-19): *Batería nueva falta realizar algunas pruebas más y calificaré* — Los bornes de la batería son más pequeños que los que tenemos aquí España, aunque viene con un adaptador que deja mucho que desear debería ser más robusto y apropiado, yo la acabo de cambiar y el rendimiento no sé cómo será lo he probado en el mover de la caravana y en principio ha funcionado correctamente. Lo he probado dos veces. posteriormente calificaré y veré qué tal resultado da ## 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 · 2026-11-11*