# Optima YTS-2.7 · Auxiliary battery 12V 38Ah 460A ![Optima YTS-2.7 · Auxiliary battery 12V 38Ah 460A](https://bateriasonline.es/3888-home_default/optima-yts-2-7.jpg) > Optima YTS-2.7 (ETN 871176000): 38 Ah auxiliary battery, 460 A (EN), 237×129×227 mm, positive terminal on the left. **Category:** [Auxiliary batteries (back-up and in-vehicle service)](https://bateriasonline.es/en/auxiliary-backup-batteries) → [Optima](https://bateriasonline.es/en/optima-batteries) - **Canonical URL**: https://bateriasonline.es/en/optima-yts-2-7 - **Language**: en - **Brand**: Optima - **Reference**: BOL-OPTIMA-YTS-2.7 - **EAN**: 4016987113615 - **MPN**: YTS-2.7 - **Price**: 151,80 € (VAT incl., Spain) - **Last updated**: 2026-11-07 ## Technical specifications | Feature | Value | |---|---| | Brand | Optima | | Range | OPTIMA YELLOW TOP | | Application | Auxiliary and back-up use | | Technology | Spiral AGM | | Voltage | 12 V | | Capacity | 38 Ah | | Cold cranking amps (EN) | 460 A | | Length | 237 mm | | Width | 129 mm | | Height | 227 mm | | Weight | 12.5 kg | | Polarity | Positive terminal on the left | | Case size | B24 (238 × 129 × 227 mm) | | ETN code | 871176000 | ## Quick description Optima YTS-2.7 (ETN 871 176 000, also written 871176000): auxiliary battery (spiral AGM) with 12 V, 38 Ah and 460 A cold cranking current, case size B24 (237 × 129 × 227 mm), with the positive terminal on the left. With the positive terminal on the right, the exact counterpart is the Optima YTR-2.7. ## Description ## Where the Optima YTS-2.7 fits The Optima YTS-2.7 is an auxiliary vehicle battery: it powers back-up functions such as Start-Stop, electric steering or the emergency system while the main battery starts the engine. Without it, Start-Stop or back-up warnings appear on the dashboard. The YTS-2.7 belongs to the Optima OPTIMA YELLOW TOP range. [See all Optima batteries](https://bateriasonline.es/en/optima-batteries) ## Spiral AGM technology in the YTS-2.7 The YTS-2.7 is a spiral-cell AGM battery. Perfect for 4x4s, marine use and vehicles with lots of electronics. ## Optima YTS-2.7 vs YTR-2.7 What sets the YTS-2.7 apart from its neighbours in the Optima range: | Model | Capacity | Cold cranking (EN) | Dimensions (mm) | Positive | Weight | |---|---|---|---|---|---| | Optima YTS-2.7 (this one) | 38 Ah | 460 A | 237 × 129 × 227 | left | 12.5 kg | | Optima YTR-2.7 | 38 Ah | 460 A | 237 × 129 × 227 | right | 12.5 kg | - The Optima YTR-2.7 is the same battery with the positive terminal on the other side: choose it if your current battery has the positive terminal on the right. ## Equivalents and alternatives to the Optima YTS-2.7 As the YTS-2.7 is an AGM battery, we only list other AGM batteries with its dimensions and polarity: neither an EFB nor a conventional battery can replace it. | Model | Technology | Capacity | Cold cranking (EN) | Dimensions (mm) | |---|---|---|---|---| | Optima YTR-2.7J | Spiral AGM | 38 Ah | 460 A | 237 × 129 × 227 | | Optima YTS-2.7J | Spiral AGM | 38 Ah | 460 A | 237 × 129 × 227 | ## Optima YTS-2.7 codes and part numbers The YTS-2.7 is listed under these codes on labels, in garages and in catalogues: | Commercial reference | YTS-2.7 | |---|---| | ETN code | 871176000 (also 871 176 000) | | EAN | 4016987113615 | | Case size (EN) | B24 | | Case size according to Optima | 51 (BCI) | | Base hold-down | B00 | | Also known as | Optima 871176000 · Optima 871 176 000 | | Not to be confused with | Optima YTR-2.7 (38 Ah, 460 A, positive terminal on the right), Optima YTS-2.1 (55 Ah, 765 A), Optima YTS-2.7J (38 Ah, 460 A) | ## Before ordering the YTS-2.7, check this - Cold cranking: 460 A (EN), equal to or higher than the original. - Your current battery should say about 38 Ah; a little more is also fine. - Polarity of the YTS-2.7: positive terminal on the left (if yours has it on the other side, the cables will not reach). - The YTS-2.7 needs 237 × 129 × 227 mm of space (European case size B24): measure it with the hold-down clamp in place. ## Frequently asked questions about the Optima YTS-2.7 ### What is the difference between the Optima YTS-2.7 and the YTR-2.7? They are the same battery with the terminals swapped: positive terminal on the left on the YTS-2.7, positive terminal on the right on the YTR-2.7. Look at your current battery with the terminals facing you and pick the one that matches. That is why their ETNs only differ in the middle group: 871 176 000 for the YTS-2.7 and 873 176 000 for the YTR-2.7. ### What is the ETN code of the Optima YTS-2.7? 871176000, also written 871 176 000. The ETN (European Type Number) is printed on the label and used in parts catalogues. ### How much does the Optima YTS-2.7 weigh? The YTS-2.7 weighs 12.5 kg. ### Which battery is equivalent to the Optima YTS-2.7? Only other AGM batteries with its dimensions and polarity: Optima YTR-2.7J and Optima YTS-2.7J. Neither an EFB nor a conventional battery replaces the YTS-2.7. ### What case size is the Optima YTS-2.7? Case size B24: 237 × 129 × 227 mm (Optima lists it as 51 (BCI)). The YTS-2.7 fits any standard B24 battery tray such as the Optima YTR-2.7J. ### What is the cold cranking current of the Optima YTS-2.7? 460 A to the EN standard, with 38 Ah capacity. ### Which charger does the Optima YTS-2.7 need? A charger with an AGM mode. If the battery has dropped below 10.5 V some chargers will not recognise it: use one with a recovery mode or one specific to spiral AGM. ## Other options if you are unsure about the YTS-2.7 - [Other auxiliary batteries (back-up and in-vehicle service)](https://bateriasonline.es/en/auxiliary-backup-batteries) - [Full Optima catalogue](https://bateriasonline.es/en/optima-batteries) - [Fullriver FT438-U1R](https://bateriasonline.es/en/fullriver-ft438-u1r) · 35 Ah, 438 A, 196×131×192 mm - [Exide EK500](https://bateriasonline.es/en/exide-ek500) · 50 Ah, 570 A, 207×175×190 mm --- *bateriasonline.es — Batteries and accessories · 2026-11-10*