# Stationary UPS battery Ritar RT1245 12V 4.5Ah AGM ![Stationary UPS battery Ritar RT1245 12V 4.5Ah AGM](https://baterias.com/710-home_default/battery-ritar-rt1245-12v-4-5ah-rt-agm.jpg) > Ritar RT1245 stationary UPS battery 12V 4.5Ah AGM. RT range. Dimensions 90×70×107 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-rt1245-12v-4-5ah-rt-agm - **Language**: en-GB - **Brand**: RITAR - **Reference**: BCOM-RITAR-RT1245 - **MPN**: RT1245 - **Price**: 31,30 € (VAT incl., Spain) - **Last updated**: 2026-10-28 - **Stock**: In stock ## Technical specifications | Feature | Value | |---|---| | Brand | RITAR | | Reference | RT1245 | | Model | RITAR RT | | Voltage (V) | 12 V | | Largo | 90 mm | | Ancho | 70 mm | | Alto | 107 mm | | Tecnología | AGM | | Terminal type | F1/F2 | | Capacity (C20) | 4 5 Ah (c20) | ## Quick description **Ritar RT1245 12V 4Ah** 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 4 Ah C20 📏 Dimensions 90×70×107 mm ⚙️ Technology AGM ⚖️ Weight 1,3 kg 🏷️ Model RITAR RT ## Description ## Stationary battery Ritar RT1245 RT 4Ah 12V 12*V* Voltage 4*Ah* Capacity 1.30*kg* Weight Designed for UPS, alarms, telecoms and emergency lighting, the **Ritar RT1245** from the **RT** range offers **4 Ah** with AGM technology on permanent float charge. Its 90 × 70 × 107 mm make it the exact replacement for the 4 Ah battery fitted as standard to many UPS, alarm and emergency systems. - Standard format for UPS and emergency systems. - Low self-discharge and high reliability. - Instant response to mains failures. - AGM: faster recharging and better cycle resistance than a conventional battery. ### What the Ritar RT1245 is for With 4 Ah, the Ritar RT1245 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 1.30 kg and F1/F2 terminals. ### Dimensions, polarity and mounting The Ritar RT1245 is made in the 90 × 70 × 107 mm format and weighs 1.30 kg. It uses F1/F2 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. ### The Ritar RT1245: RT range and AGM technology Within the Ritar catalogue, the **RT** series groups the references designed for this use. The RT1245 is the 4 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. ### Ritar: the maker behind the RT1245 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. We guarantee that every Ritar arrives new, charged and with the manufacturer's full warranty. ### Manufacturer's warranty The Ritar RT1245 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. ### Care and maintenance Replace all the batteries in the set at once and avoid environments continuously above 25 °C. Charge with a charger that has an AGM mode: it limits the voltage and protects the glass-fibre separators. ### When you get it and how to return it Same-day dispatch from our warehouse for in-stock orders placed **before 6:00 pm**: 24-48 working hours in mainland Spain and Portugal, 3 to 5 days in the islands and the rest of Europe. Returns are accepted for **14 days** if the battery has not been used (free collection on the Iberian mainland). You will receive tracking by email. ## Frequently asked questions ### Is the RT1245 model AGM? What does this technology offer? Yes. The RT1245 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. ### What are the dimensions of the Ritar RT1245 battery? Dimensions (length × width × height) are 90×70×107 mm — also written as 90x70x107 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. ### Ritar RT1245 or Ritar RT1250: which one to choose? The next step up from the RT1245 in the same range and the same case. Compared with the RT1245 it has 1 Ah more. It costs 8,30 € more. More capacity means more runtime: worth it if your equipment takes the size and had that capacity or more; otherwise the RT1245 does the job. ## Equivalent batteries - [RITAR RT1250](https://baterias.com/gb/battery-ritar-rt1250-12v-5ah) ## Reviews - **Average rating**: 2 / 5 (1 reviews) Average rating 2/5 from 1 verified-purchase reviews (ks_recovery, unfiltered). The 3 most recent: - ★★ **Byteco L.** (2026-02-24): *Looks Used, and it's F1 terminal* — In fact maybe it's new , but looks used.. I will find out in usage.. Terminals no way to Know, for the other buyers - mine arrived as F1.. I wanted F2 It was fast delivery as promised... one star for that ## 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 · 2026-11-06*