# Stationary UPS battery Fulbat FP12-55 12V 55Ah AGM ![Stationary UPS battery Fulbat FP12-55 12V 55Ah AGM](https://baterias.com/6513-home_default/battery-fulbat-fp12-55-12v-55ah.jpg) > Fulbat FP12-55 stationary UPS battery 12V 55Ah AGM. FP General Purpose range. Dimensions 257Γ—132Γ—200 mm, + terminal on the left. Long float life. **Category:** [Batteries for UPS / UPS](https://baterias.com/gb/batteries-for-sai-ups) β†’ [FULBAT](https://baterias.com/gb/fulbat) - **Canonical URL**: https://baterias.com/gb/battery-fulbat-fp12-55-12v-55ah - **Language**: en-GB - **Brand**: FULBAT - **Reference**: BCOM-FULBAT-FP12-55 - **MPN**: FP12-55 - **Stock**: Out of stock ## Technical specifications | Feature | Value | |---|---| | Brand | FULBAT | | Model | FULBAT FP General Purpose | | Voltage (V) | 12 V | | Largo | 257 mm | | Ancho | 132 mm | | Alto | 200 mm | | TecnologΓ­a | AGM | | Terminal layout | Positive left | | Terminal type | BOLT-M6 | | Capacity (C20) | 55 Ah | ## Quick description **Fulbat FP12-55 12V 55Ah** is a stationary battery for backup power systems: UPS, alarms, telecom and emergency lighting. Long float-life under permanent charge and instant response to mains outages with no noticeable voltage drop. ### Why this stationary battery? - **Instant response** when the mains drop, no voltage dip - **Long life under 24/7 charge** optimised for permanent service - **Compatible with your system** existing UPS units and alarm control panels πŸ”Œ Voltage 12 V ⚑ Capacity 55 Ah C20 πŸ“ Dimensions 257Γ—132Γ—200 mm βš™οΈ Technology AGM 🧭 Polarity Positive on the left ## Description ## Stationary battery Fulbat FP12-55 55Ah 12V 12*V* Voltage 55*Ah* Capacity The **Fulbat FP12-55** with AGM technology is a **55 Ah**, **12 V** backup battery for UPS, alarms, telecoms and emergency lighting. It measures 257 Γ— 132 Γ— 200 mm and the positive terminal on the left, the format sought by anyone replacing a 55 Ah battery in UPS, alarm and emergency systems. - Maintenance-free for its whole service life. - Sealed and gas-free: suitable for cabinets and offices. - Long float life under permanent charge. - AGM technology: absorbed electrolyte, no spills, can be mounted at an angle. ### Will it fit your current battery tray? It has external dimensions of 257 Γ— 132 Γ— 200 mm. 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 BOLT-M6 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. ### What the Fulbat FP12-55 is for The Fulbat FP12-55 is designed for UPS, alarms, telecoms and emergency lighting: it sits on float charge and responds instantly to a mains failure. Check that it matches your current battery in dimensions, terminals and hold-down: this reference has BOLT-M6 terminals. ### Technology inside the Fulbat FP12-55 Within the Fulbat catalogue, the FP12-55 is the 55 Ah model designed for this application. 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. ### What Fulbat does differently Fulbat has manufactured in France since 1978 and specialises in motorcycles and light vehicles. Its catalogue is short and clear, covers almost the whole fleet and works only with sealed, leak-free batteries. All the Fulbat batteries in our catalogue are genuine product, recently manufactured and covered by the manufacturer's warranty. ### Warranty and coverage The Fulbat FP12-55 comes with the **manufacturer's official warranty** against manufacturing defects. If it fails through a defect within the warranty period, we replace it at no cost to you. ### Usage and maintenance tips Check the float voltage of the UPS or charger: a voltage that is too high shortens the life of a sealed battery. Charge with a charger that has an AGM mode: it limits the voltage and protects the glass-fibre separators. ### Delivery times and returns Order **before [[ks:cutoff]]** 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 **[[ks:return_days]] days** to return it if it has not been installed, with free collection on the mainland, and shipment tracking by email. ## Frequently asked questions ### How do I fit the FP12-55 model in my device? In most devices 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 this page. 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 (βˆ’) 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 β€” match the polarity shown on the product sheet; 6) connect the positive (+) first, then the negative (βˆ’). On devices 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 FP12-55 model? Expected lifespan of the Fulbat FP12-55 is 4 to 7 years in regular use (depends on technology and climate). 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 size is this battery? Dimensions (length Γ— width Γ— height) are 257Γ—132Γ—200 mm β€” also written as 257x132x200 mm β€” following the European DIN standard. Always measure the space in your device before buying: even one extra millimetre can prevent the hold-down clamp from closing. The height shown includes the terminals. ### Which batteries are equivalent to the Fulbat FP12-55? 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 β€” an EFB cannot be replaced with a conventional battery in Start-Stop devices. 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 β€” over 25 years of experience validating automotive batteries. β†’ https://baterias.com/gb/technical-team --- *baterias.com β€” Automotive batteries Β· 2026-10-03*