# Fulbat FTX20L-BS · Motorcycle battery 12V 18.9Ah 270A ![Fulbat FTX20L-BS · Motorcycle battery 12V 18.9Ah 270A](https://bateriasonline.es/635-home_default/fulbat-ftx20l-bs.jpg) > Fulbat FTX20L-BS: 18.9 Ah motorcycle battery, 270 A (EN), 175×87×155 mm, positive terminal on the right, AGM. Equivalent to Exide AGM12-19 and Exide ETX20HL-BS. **Category:** [Motorcycle batteries](https://bateriasonline.es/en/motorcycle-batteries) → [Fulbat](https://bateriasonline.es/en/fulbat-batteries) - **Canonical URL**: https://bateriasonline.es/en/fulbat-ftx20l-bs - **Language**: en - **Brand**: Fulbat - **Reference**: BOL-FULBAT-FTX20L-BS - **MPN**: FTX20L-BS - **Last updated**: 2026-11-06 ## Technical specifications | Feature | Value | |---|---| | Brand | Fulbat | | Range | FULBAT Motorcycle MF | | Application | Motorcycles | | Technology | AGM | | Voltage | 12 V | | Capacity | 18.9 Ah | | Cold cranking amps (EN) | 270 A | | Length | 175 mm | | Width | 87 mm | | Height | 155 mm | | Weight | 5.98 kg | | Polarity | Positive terminal on the right | ## Quick description Fulbat FTX20L-BS: motorcycle battery (AGM) with 12 V, 18.9 Ah and 270 A cold cranking current, measuring 175 × 87 × 155 mm, with the positive terminal on the right. Need the positive terminal on the left? The same battery is the Fulbat FTX20-BS. ## Description ## The Fulbat FTX20L-BS at a glance The Fulbat FTX20L-BS is a motorcycle starter battery: compact, vibration-resistant and with just the right power to turn the starter motor and feed the electronics. With 18.9 Ah, the FTX20L-BS suits motorcycles and scooters that had a battery of that capacity. At 18.9 Ah it goes into large-capacity motorcycles, adventure bikes, customs and quads. The FTX20L-BS belongs to the Fulbat FULBAT Motorcycle MF range. [The full range of Fulbat batteries](https://bateriasonline.es/en/fulbat-batteries) ## Fulbat FTX20L-BS codes and part numbers Look for any of these FTX20L-BS codes on your current battery or in the manufacturer's catalogue: | Commercial reference | FTX20L-BS | |---|---| | Not to be confused with | Fulbat FTX20-BS (18.9 Ah, 270 A, positive terminal on the left), Fulbat FTX20A-BS (18.9 Ah, 270 A, positive terminal on the left) | ## Equivalents and alternatives to the Fulbat FTX20L-BS As the FTX20L-BS 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) | |---|---|---|---|---| | Varta YTX20L-4 (FA) | AGM | 18 Ah | 270 A | 175 × 87 × 154 | | Exide AGM12-19 | AGM | 18 Ah | 270 A | 175 × 90 × 155 | | Exide ETX20HL-BS | AGM | 18 Ah | 270 A | 175 × 90 × 155 | | Varta YTX20H-BS | AGM | 18 Ah | 320 A | 175 × 87 × 154 | | Varta YTX20HL-BS | AGM | 18 Ah | 320 A | 175 × 87 × 154 | | Motobatt MBTX20U | AGM | 21 Ah | 310 A | 175 × 87 × 155 | ## Fulbat FTX20L-BS vs FTX24HL-BS, FTX20-BS and FTX14L-BS What sets the FTX20L-BS apart from its neighbours in the Fulbat range: | Model | Capacity | Cold cranking (EN) | Dimensions (mm) | Positive | Weight | |---|---|---|---|---|---| | Fulbat FTX20L-BS (this one) | 18.9 Ah | 270 A | 175 × 87 × 155 | right | 5.98 kg | | Fulbat FTX24HL-BS | 22.1 Ah | 350 A | 205 × 87 × 162 | right | 7.34 kg | | Fulbat FTX20-BS | 18.9 Ah | 270 A | 175 × 87 × 155 | left | 5.98 kg | | Fulbat FTX14L-BS | 12.6 Ah | 200 A | 150 × 87 × 145 | right | 4.29 kg | - Fulbat FTX24HL-BS: 3.20 Ah more, 80 A more cranking power, a different case (205 × 87 × 162 mm). - Fulbat FTX20-BS: identical to the FTX20L-BS except for the positive terminal, which is on the other side (positive terminal on the left). - Fulbat FTX14L-BS: 6.30 Ah less, 70 A less cranking power, a different case (150 × 87 × 145 mm). ## What to look at before buying the FTX20L-BS - The FTX20L-BS needs 175 × 87 × 155 mm of space: measure it with the hold-down clamp in place. - With the terminals facing you, the positive terminal of the FTX20L-BS is on the right. - With 18.9 Ah, the FTX20L-BS replaces an original battery of that capacity or slightly less. - Cold cranking: 270 A (EN), equal to or higher than the original. ## Frequently asked questions about the Fulbat FTX20L-BS ### Fulbat FTX20L-BS or FTX24HL-BS? Compared with the FTX20L-BS, the Fulbat FTX24HL-BS has 3.20 Ah more and 80 A more cranking power. If your current battery says 350 A or more, choose the FTX24HL-BS; if it says 270 A or less, the FTX20L-BS is enough. Mind the space: the FTX24HL-BS measures 205 × 87 × 162 mm. ### What is the difference between the Fulbat FTX20L-BS and the FTX20-BS? They are the same battery with the terminals swapped: positive terminal on the right on the FTX20L-BS, positive terminal on the left on the FTX20-BS. Look at your current battery with the terminals facing you and pick the one that matches. ### How much does the Fulbat FTX20L-BS weigh? The FTX20L-BS weighs 5.98 kg. For reference, the Fulbat FTX24HL-BS (22.1 Ah) weighs 7.34 kg. ### Which battery is equivalent to the Fulbat FTX20L-BS? Only other AGM batteries with its dimensions and polarity: Varta YTX20L-4 (FA), Exide AGM12-19 and Exide ETX20HL-BS. Neither an EFB nor a conventional battery replaces the FTX20L-BS. ### Which charger does the Fulbat FTX20L-BS need? A charger with an AGM mode that limits voltage to about 14.4-14.7 V. Never an old unregulated charger: overcharging dries out an AGM beyond repair. ## Inside the FTX20L-BS: AGM technology The FTX20L-BS is AGM: the electrolyte is absorbed in glass fibre mats, so it is sealed and spill-proof. Being sealed, the FTX20L-BS can be fitted in the boot or under a seat with no risk of spills. ## Keep comparing: alternatives to the FTX20L-BS - [Other motorcycle batteries](https://bateriasonline.es/en/motorcycle-batteries) - [More Fulbat models](https://bateriasonline.es/en/fulbat-batteries) - [Varta YTX20L-4 (FA)](https://bateriasonline.es/en/varta-ytx20l-4-fa-518909027) · 18 Ah, 270 A, 175×87×154 mm - [Exide AGM12-19](https://bateriasonline.es/en/exide-agm12-19) · 18 Ah, 270 A, 175×90×155 mm --- *bateriasonline.es — Batteries and accessories · 2026-11-10*