# Stationary UPS battery Ritar RL21500 2V 1500Ah AGM ![Stationary UPS battery Ritar RL21500 2V 1500Ah AGM](https://baterias.com/730-home_default/battery-ritar-rl21500-2v-1500ah.jpg) > Ritar RL21500 stationary UPS battery 2V 1500Ah AGM. RL range. Dimensions 355×337×342 mm. Long float life for UPS, alarms and standby equipment. **Category:** [Batteries for telecommunications systems](https://baterias.com/gb/batteries-for-telecommunications-systems) → [RITAR](https://baterias.com/gb/ritar) - **Canonical URL**: https://baterias.com/gb/battery-ritar-rl21500-2v-1500ah - **Language**: en-GB - **Brand**: RITAR - **Reference**: BCOM-RITAR-RL21500 - **MPN**: RL21500 - **Price**: 875,95 € - **Stock**: Out of stock ## Technical specifications | Feature | Value | |---|---| | Brand | RITAR | | Reference | RL21500 | | Model | RITAR RL | | Voltage (V) | 2 V | | Largo | 355 mm | | Ancho | 337 mm | | Alto | 342 mm | | Peso | 85 kg | | Tecnología | AGM | | Terminal type | F10(M8) | | Capacity (C20) | 1500 | | Capacity (C10) | 1500 Ah (c10) | | Capacity (C5) | 1313 Ah (c5) | ## Quick description **Ritar RL21500 2V 1500Ah** 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 2 V ⚡ Capacity 1500 Ah C10 📏 Dimensions 355×337×342 mm ⚙️ Technology AGM ⚖️ Weight 85 kg 🏷️ Model RITAR RL ## Description ## Stationary battery Ritar RL21500 RL 1,500Ah 2V 2*V* Voltage 1,500*Ah* Capacity 85*kg* Weight Designed for UPS, alarms, telecoms and emergency lighting, the **Ritar RL21500** from the **RL** range offers **1,500 Ah** with AGM technology on permanent float charge. Measuring 355 × 337 × 342 mm, it is the direct replacement for UPS, alarm and emergency systems fitted from the factory with a 1,500 Ah battery of this format. - Low self-discharge and high reliability. - Standard format for UPS and emergency systems. - AGM: faster recharging and better cycle resistance than a conventional battery. - Instant response to mains failures. ### What the Ritar RL21500 is for With 1,500 Ah, the Ritar RL21500 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 85 kg and F10(M8) terminals. ### Size, terminals and hold-down of the Ritar RL21500 In terms of format, the Ritar RL21500 measures 355 × 337 × 342 mm (length × width × height) and weighs 85 kg. It uses F10(M8) 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. ### Ritar: the maker behind the RL21500 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. ### The Ritar RL21500: RL range and AGM technology The RL21500 is part of the Ritar **RL** range. Choosing the right reference within the series comes down to capacity, dimensions and terminals: technology and quality are common to the whole family. In an AGM battery the electrolyte is absorbed in glass-fibre separators: there is no free liquid, it cannot spill and it can be mounted at an angle. That construction lowers internal resistance, speeds up recharging and multiplies cycle life compared with a conventional battery. ### How to make it last longer Check the float voltage of the UPS or charger: a voltage that is too high shortens the life of a sealed battery. Replace all the batteries in the set at once and avoid environments continuously above 25 °C. ### Warranty and coverage The Ritar RL21500 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 Orders placed **before [[ks:cutoff]]** with the battery in stock ship the same day. Delivery in mainland Spain and Portugal takes 24-48 working hours; for the Balearic and Canary Islands and the rest of the European Union allow 3 to 5 working days. You have **[[ks:return_days]] days** to return an unused battery; in mainland Spain and Portugal collection is free. We email you the tracking number as soon as the parcel ships. ## Frequently asked questions ### Is the Ritar RL21500 an AGM battery and what are the benefits of AGM? Yes. The RL21500 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 change this battery step by step? 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. ### What is the service life of the RL21500 model? Expected lifespan of the Ritar RL21500 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 dimensions of the Ritar RL21500 battery? Dimensions (length × width × height) are 355×337×342 mm — also written as 355x337x342 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. ### What are the equivalents of the RL21500 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 devices. See the "Equivalents" section to view recommended options at the same performance level. ## Reviews - **Average rating**: 4.61 / 5 (6 reviews) ## Technical team (editorial authorship) The FAQs, guides and comparisons on this site are reviewed by the baterias.com technical team — over 25 years of experience validating automotive batteries. → https://baterias.com/gb/technical-team --- *baterias.com — Automotive batteries · 2026-10-01*