# Marine battery Fullriver FT1100-31ST 12V 110Ah 1100A AGM ![Marine battery Fullriver FT1100-31ST 12V 110Ah 1100A AGM](https://baterias.com/3174-home_default/battery-fullriver-ft1100-31st-12v-110ah-1100a.jpg) > Fullriver FT1100-31ST marine battery 12V 110Ah 1100A AGM. Full Throttle Series range. Dimensions 330×173×232 mm. Cranking and house duties. **Category:** [Boat Batteries](https://baterias.com/gb/boat-batteries) → [FULLRIVER](https://baterias.com/gb/fullriver) - **Canonical URL**: https://baterias.com/gb/battery-fullriver-ft1100-31st-12v-110ah-1100a - **Language**: en-GB - **Brand**: FULLRIVER - **Reference**: BCOM-FULLRIVER-FT1100-31ST - **MPN**: FT1100-31ST - **Price**: 479,40 € - **Stock**: Out of stock ## Technical specifications | Feature | Value | |---|---| | Brand | FULLRIVER | | Reference | FT1100-31 ST | | Model | Full Throttle Series | | Voltage (V) | 12 V | | Largo | 330 cm | | Ancho | 173 cm | | Alto | 232 cm | | Peso | 34.1 kg | | Tecnología | AGM | | EAN | 810233030626 | | Terminal type | 3/8" Stud | | Cold cranking amps (EN) | 1100 | | Capacity (C20) | 110 | | Case type | 31 T | ## Quick description **Fullriver FT1100-31ST 12V 110Ah 1100A** is a marine battery with reinforced anti-vibration case for moorings and offshore use. Tolerates the typical daily cycles on a boat (engine start + night-time services such as lights, sonar, fridge) and holds voltage even when the hull is rolling in open sea. ## Why this marine battery? - **Marine design** built for boat swell and vibration - **Dual function** starts the engine and powers onboard services - **Sealed and safe** maintenance-free even when the boat rolls 🔌 Voltage 12 V ⚡ Capacity 110 Ah C20 🔋 Cold cranking 1100 A EN-1 📏 Dimensions 330×173×232 mm ⚙️ Technology AGM ⚖️ Weight 34,1 kg 🏷️ Model Full Throttle Series ## Description ## Marine battery Fullriver FT1100-31ST Full Throttle Series 110Ah 1,100A 12V 12*V* Voltage 110*Ah* Capacity 1,100*A* Cold cranking 34.10*kg* Weight With **110 Ah** at **12 V** and **1,100 A** of cold cranking current (EN), the **Fullriver FT1100-31ST** from the **Full Throttle Series** range is built for motor and sailing boats, both for engine starting and onboard services. Its 330 × 173 × 232 mm make it the exact replacement for the 110 Ah battery fitted as standard to many boats. - Resistant to humidity and salt air. - Sealed: no spills or gases in the locker. - Ready for starting outboard and inboard engines. - AGM: faster recharging and better cycle resistance than a conventional battery. ### What the Fullriver FT1100-31ST is for With 110 Ah, the Fullriver FT1100-31ST covers motor and sailing boats, both for engine starting and onboard services. At the end of the season, charge it fully before winter storage. Check that it matches your current battery in dimensions, terminals and hold-down: this reference has a weight of 34.10 kg and 3/8" Stud terminals. ### Size, terminals and hold-down of the Fullriver FT1100-31ST In terms of format, the Fullriver FT1100-31ST measures 330 × 173 × 232 mm (length × width × height) and weighs 34.10 kg. It uses 3/8" Stud 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 Fullriver FT1100-31ST: Full Throttle Series range and AGM technology The **Full Throttle Series** is the Fullriver range the FT1100-31ST belongs to: it shares the same construction and quality criteria with the rest of the series, and varies in capacity and format to suit each vehicle. AGM means the acid is held in a glass mat instead of floating free. That is why the battery can be installed in the cabin without gases, survives more cycles and recovers its charge quickly. ### Why choose Fullriver batteries Fullriver specialises in deep-cycle AGM batteries for mobility, marine, solar and traction. Its DC and HC series are known for their tolerance to deep discharge and long cycle life. We guarantee that every Fullriver arrives new, charged and with the manufacturer's full warranty. ### Warranty and coverage The Fullriver FT1100-31ST comes with the **manufacturer's official warranty** against manufacturing defects. Deep discharge from winter lay-up without charging is not covered. ### How to make it last longer Charge with a charger that has an AGM mode: it limits the voltage and protects the glass-fibre separators. At the end of the season, charge the battery fully and, if possible, keep it on a charger over the winter lay-up. ### Shipping, delivery 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 Fullriver FT1100-31ST an AGM battery and what are the benefits of AGM? Yes. The FT1100-31ST from Fullriver 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 boats with advanced Start-Stop and regenerative braking. Expected lifespan: 5-8 years under normal conditions. ### How do I change this battery step by step? In most boats it fits in 15-30 minutes with a 10 mm wrench; if the battery is under the seat or in the boot the time can double. See the step-by-step guide on our blog. Quick summary: 1) switch off the engine and remove the key; 2) locate the original battery (engine bay, boot or under seat); 3) disconnect the negative (−) terminal first, then the positive (+); 4) loosen the hold-down clamp and remove the old battery; 5) fit the new one in the same orientation — match the polarity shown on the product sheet; 6) connect the positive (+) first, then the negative (−). On boats with Start-Stop or BMS, register the battery via OBD so the alternator applies the correct charging profile. ### What is the service life of the FT1100-31ST model? Expected lifespan of the Fullriver FT1100-31ST is 5 to 8 years in mild-climate boat use with Start-Stop. 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 FT1100-31ST model? Dimensions (length × width × height) are 330×173×232 mm — also written as 330x173x232 mm — following the European DIN standard. Always measure the space in your boat before buying: even one extra millimetre can prevent the hold-down clamp from closing. The height shown includes the terminals. ### Will the Fullriver FT1100-31ST battery fit my boat? 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 16:40–18:00 (Spanish time, CET)). The FT1100-31ST typically fits a wide range of European vehicles thanks to its standard DIN case format. ### What are the equivalents of the FT1100-31ST 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 boats. See the "Equivalents" section to view recommended options at the same performance level. ## 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 · 2026-10-23*