# Stationary UPS battery Ritar RT12120 12V 12Ah AGM ![Stationary UPS battery Ritar RT12120 12V 12Ah AGM](https://baterias.com/718-home_default/battery-ritar-rt12120-12v-12ah-rt-agm.jpg) > Ritar RT12120 stationary UPS battery 12V 12Ah AGM. RT range. Dimensions 151×98×101 mm. Long float life for UPS, alarms and standby equipment. **Category:** [Batteries for UPS / UPS](https://baterias.com/gb/batteries-for-sai-ups) → [RITAR](https://baterias.com/gb/ritar) - **Canonical URL**: https://baterias.com/gb/battery-ritar-rt12120-12v-12ah-rt-agm - **Language**: en-GB - **Brand**: RITAR - **Reference**: BCOM-RITAR-RT12120 - **MPN**: RT12120 - **Price**: 66,10 € - **Stock**: In stock ## Technical specifications | Feature | Value | |---|---| | Brand | RITAR | | Reference | RT12120 | | Model | RITAR RT | | Voltage (V) | 12 V | | Largo | 151 mm | | Ancho | 98 mm | | Alto | 101 mm | | Tecnología | AGM | | Terminal type | F1/F2 | | Capacity (C20) | 12 Ah (c20) | ## Quick description **Ritar RT12120 12V 12Ah** 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 🔌 Voltage 12 V ⚡ Capacity 12 Ah C20 📏 Dimensions 151×98×101 mm ⚙️ Technology AGM ⚖️ Weight 3,5 kg 🏷️ Model RITAR RT ## Description ## Stationary battery Ritar RT12120 RT 12Ah 12V 12*V* Voltage 12*Ah* Capacity 3.50*kg* Weight The **12 V**, **12 Ah** **Ritar RT12120** stationary battery from the **RT** range with AGM technology is designed for UPS, alarms, telecoms and emergency lighting. Its 151 × 98 × 101 mm make it the exact replacement for the 12 Ah battery fitted as standard to many UPS, alarm and emergency systems. - Instant response to mains failures. - AGM: faster recharging and better cycle resistance than a conventional battery. - Standard format for UPS and emergency systems. - Low self-discharge and high reliability. ### What the Ritar RT12120 is for With 12 Ah, the Ritar RT12120 gives your UPS or emergency system the autonomy it needs. Replace all the batteries in the set at once. Check that it matches your current battery in dimensions, terminals and hold-down: this reference has a weight of 3.50 kg and F1/F2 terminals. ### Dimensions, polarity and mounting The Ritar RT12120 is made in the 151 × 98 × 101 mm format and weighs 3.50 kg. It uses F1/F2 terminals, the system that anchors and connects it in the vehicle. Before replacing it, measure your current battery tray: if all three dimensions and the terminal positions match, the swap is direct and needs no adapters. ### Why choose Ritar batteries With more than twenty years making sealed lead batteries, Ritar offers general-purpose, long-life, high-rate and front-terminal ranges for every stationary application. All the Ritar batteries in our catalogue are genuine product, recently manufactured and covered by the manufacturer's warranty. ### The Ritar RT12120: RT range and AGM technology Within the Ritar catalogue, the **RT** series groups the references designed for this use. The RT12120 is the 12 Ah model of that family, with the same performance as its siblings in other sizes. AGM (Absorbent Glass Mat) technology seals the electrolyte in glass microfibre. The result is a maintenance-free battery that is highly vibration-resistant and able to withstand deep discharges that would ruin a classic lead-acid battery. ### Care and maintenance Charge with a charger that has an AGM mode: it limits the voltage and protects the glass-fibre separators. Check the float voltage of the UPS or charger: a voltage that is too high shortens the life of a sealed battery. ### Official warranty The Ritar RT12120 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. ### 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 ### Is this battery AGM? What is it for? Yes. The RT12120 from Ritar 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 devices with advanced Start-Stop and regenerative braking. Expected lifespan: 5-8 years under normal conditions. ### How do I fit the RT12120 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 (−) 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 devices with Start-Stop or BMS, register the battery via OBD so the alternator applies the correct charging profile. ### How long does the Ritar RT12120 battery last? Expected lifespan of the Ritar RT12120 is 5 to 8 years in mild-climate device 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 RT12120 model? Dimensions (length × width × height) are 151×98×101 mm — also written as 151x98x101 mm — 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 interchangeable batteries are there for this one? 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 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 — automotive battery specialists since 2015. → https://baterias.com/gb/technical-team --- *baterias.com — Automotive batteries · 2026-10-12*