# Motorcycle battery Exide ETX20H-BS 12V 18Ah 270A AGM ![Motorcycle battery Exide ETX20H-BS 12V 18Ah 270A AGM](https://baterias.com/6850-home_default/battery-exide-etx20h-bs-12v-18ah-270a.jpg) > Exide ETX20H-BS motorcycle battery 12V 18Ah 270A AGM. MOTO AGM 12V range. Dimensions 175×90×155 mm, + terminal on the left. Verified OEM fitment. **Category:** [Motorcycle Batteries](https://baterias.com/gb/motorcycle-batteries) → [EXIDE](https://baterias.com/gb/exide) - **Canonical URL**: https://baterias.com/gb/battery-exide-etx20h-bs-12v-18ah-270a - **Language**: en-GB - **Brand**: EXIDE - **Reference**: BCOM-EXIDE-ETX20H-BS - **EAN**: 3661024033893 - **MPN**: ETX20H-BS - **Price**: 57,70 € (VAT incl., Spain) - **Last updated**: 2026-10-28 - **Stock**: In stock ## Technical specifications | Feature | Value | |---|---| | Brand | EXIDE | | Reference | ETX20 H-BS | | Model | EXIDE MOTO AGM 12 V | | Voltage (V) | 12 V | | Largo | 175 cm | | Ancho | 87 cm | | Alto | 155 cm | | Peso | 6.1 kg | | Tecnología | AGM | | EAN | 3661024033893 | | Terminal layout | Positive terminal on the left | | Terminal type | M04 | | Hold down | B0 | | Cold cranking amps (EN) | 270 A | | Capacity (C20) | 18 Ah (c20) | ## Quick description **Exide ETX20H-BS 12V 18Ah 270A** is a sealed motorcycle battery ready to fit, with the JIS reference your mechanic recognises at a glance. Vibration-resistant, keeps voltage during the winter off-season and cranks first time when you take it out for a ride. ## Why this motorcycle battery? - **Same JIS reference** as your bike's original — fits first time - **Sealed and ready to use** no acid handling, no refills - **Survives winter storage** holds charge through long off-season 🏍️ JIS code ETX20H-BS 🔌 Voltage 12 V ⚡ Capacity 18 Ah C20 🔋 Cold cranking 270 A EN-1 📏 Dimensions 175×90×155 mm ⚙️ Technology AGM 🧭 Polarity Positive on the left ⚖️ Weight 6,1 kg 🏷️ Model EXIDE MOTO AGM 12V #️⃣ Mfr. reference ETX20H-BS ## Description ## Motorcycle battery Exide ETX20H-BS Moto AGM 18Ah 270A 12V 12*V* Voltage 18*Ah* Capacity 270*A* Cold cranking 6.10*kg* Weight The **Exide ETX20H-BS** from the **Moto AGM** range is a motorcycle battery with **18 Ah** and **270 A** of cold cranking current (EN), designed for motorcycles, scooters, quads and personal watercraft. Its 175 × 87 × 155 mm and the positive terminal on the left make it the exact replacement for the 18 Ah battery fitted as standard to many motorcycles. - Compact and lightweight format. - Holds its charge through winter storage. - Sealed and ready to fit, no acid handling. - AGM: faster recharging and better cycle resistance than a conventional battery. ### What the Exide ETX20H-BS is for Designed for motorcycles, scooters, quads and personal watercraft, the Exide ETX20H-BS replaces the original battery of bikes that use this code or format. Check the position of the positive terminal before ordering. Check that it matches your current battery in dimensions, terminals and hold-down: this reference has a weight of 6.10 kg, M04 terminals and B0 hold-down. ### The Exide ETX20H-BS: Moto AGM range and AGM technology The ETX20H-BS is part of the Exide **Moto AGM** 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 an AGM battery the electrolyte is absorbed in glass-fibre separators: there is no free liquid, it cannot spill and it can be mounted at an angle. That construction lowers internal resistance, speeds up recharging and multiplies cycle life compared with a conventional battery. ### Dimensions, polarity and mounting The Exide ETX20H-BS is made in the 175 × 87 × 155 mm format and weighs 6.10 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 a B0 hold-down and M04 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. ### Exide: the maker behind the ETX20H-BS Exide is one of the world's largest battery manufacturers and an original-equipment supplier to many car makers. Its European plants produce starter, industrial and leisure batteries under original-equipment quality controls. We guarantee that every Exide arrives new, charged and with the manufacturer's full warranty. ### Care and maintenance Check the resting voltage before the season (above 12.6 V on a charged battery) and make sure the terminals are clean and tight. If the bike spends the winter standing, connect a trickle charger: deep discharge through inactivity is the first cause of premature failure. ### Manufacturer's warranty The Exide ETX20H-BS comes with the **manufacturer's official warranty**. The warranty does not cover discharge through prolonged inactivity: if the bike stands for months, use a trickle charger. ### When you get it and how to return it 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 Exide ETX20H-BS an AGM battery and what are the benefits of AGM? Yes. The ETX20H-BS from Exide 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 motorcycles with advanced Start-Stop and regenerative braking. Expected lifespan: 5-8 years under normal conditions. ### How should this motorcycle battery be charged? With a 12 V motorcycle charger delivering at most 10 % of its capacity: 1.8 A for its 18 Ah. High-current car chargers can damage it. If the bike is laid up for the winter, keep it on a maintenance charger. ### Does it need maintenance? No: being AGM, it is sealed and nothing needs topping up. Just keep it charged if the bike stands for a long time. ### How long does the Exide ETX20H-BS battery last? Expected lifespan of the Exide ETX20H-BS is 4 to 6 years, keeping it charged when the bike is not in use. 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 measurements of the ETX20H-BS model? Dimensions (length × width × height) are 175×90×155 mm — also written as 175x90x155 mm — following the European DIN standard. Always measure the space in your motorcycle before buying: even one extra millimetre can prevent the hold-down clamp from closing. The height shown includes the terminals. ### On which side is the positive of the ETX20H-BS model? Polarity: positive on the left. To identify it, place the battery in front of you with the terminals facing you and check which side the positive (+, marked with a red ring) is on. Before buying, verify the polarity matches your current battery: switching polarity forces longer cables or system reconfiguration, with short-circuit risk. ### Will the Exide ETX20H-BS battery fit my motorcycle? 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 16:30–18:00 (Spanish time, CET)). The ETX20H-BS typically fits a wide range of European vehicles thanks to its standard DIN case format. ### What are the equivalents of the ETX20H-BS model? 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 motorcycles. See the "Equivalents" section to view recommended options at the same performance level. ### Exide ETX20H-BS or Exide AGM12-19.1: which one to choose? Sister reference of the ETX20H-BS, practically identical on paper. Compared with the ETX20H-BS it has the same Ah and cranking power. It costs 21,40 € more. Choose by price and availability: in real use you will not notice a difference. ## Equivalent batteries - [EXIDE AGM12-19.1](https://baterias.com/gb/battery-exide-agm12-19_1-12v-18ah-270a) ## 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 · 2026-11-02*