# RITAR HR batteries > Ritar HR high-rate AGM batteries, 12V, 5-150 W/cell, for rack UPS and peak-power loads. High output in short discharges, sealed VRLA. 24h delivery. **Category:** [Start](https://baterias.com/gb/beginning) → [Batteries](https://baterias.com/gb/batteries) → [Ritar batteries](https://baterias.com/gb/batteries-ritar) - **Canonical URL**: https://baterias.com/gb/batteries-ritar-hr - **Language**: en-GB ## Description **Ritar HR batteries** are 12V **high-rate AGM batteries** optimised for high-power discharges over short periods, from 5 to 150 W per cell. This is the series built for **rack-mounted UPS systems** and applications that demand peak power for minutes rather than hours. Compared with a standard AGM, a **high-rate UPS battery** delivers more watts in discharges of just a few minutes — exactly the duty profile of a server-room or datacentre UPS. Sealed **maintenance-free VRLA** technology, rated in W/cell just as UPS manufacturers specify. ## High-rate AGM batteries: maximum power for your UPS The **Ritar HR** (High Rate) series is built with plates and internal connections optimised for **short, high-current discharges**: the typical scenario of a UPS that must hold the load at full power for 5-15 minutes until the generator starts or the servers shut down cleanly. That is why its capacity is expressed in **watts per cell** (from 5 to 150 W/cell) as well as in Ah. They are **sealed VRLA AGM batteries**, maintenance-free and with low self-discharge, suitable for float service inside rack cabinets next to the electronics. ### Models in the Ritar HR series - **HR12-21W** — 12V 5 Ah (21 W/cell), for compact UPS units and network gear. - **HR12-90W** — 12V 23 Ah (90 W/cell), the usual format in rack UPS systems. - **HR12-150W** — 12V 40 Ah (150 W/cell), for higher-power UPS and demanding runtimes. ### How to choose your high-rate battery Start from the power (W) and runtime (minutes) your UPS requires, and keep the original number of blocks and dimensions. Our [battery comparison tool](/gb/comparator) lets you cross-check capacity, size and price across the whole HR range at a glance. ## Frequently asked questions about Ritar HR batteries ### **What does "high rate" mean in a battery?** It means the battery is optimised to deliver a lot of power in short discharges of a few minutes, rather than small currents over many hours. That is the typical duty cycle of a UPS. ### **Why are they rated in W/cell and not just in Ah?** Because UPS systems are sized by power and backup time. The watts-per-cell figure at a 15-minute rate lets you calculate directly how many blocks the unit needs. ### **What is the difference between Ritar HR and Ritar RT?** The RT is a general-purpose stand-by AGM, while the HR delivers more peak power in short discharges. For a rack UPS with runtimes of minutes, the HR gets more out of every kilo of battery. ### **Do they need maintenance?** No. They are valve-regulated sealed VRLA batteries: no water topping-up or level checks, just the correct float voltage. Catalogue curated by our technical team. **10,989 Trustpilot reviews · 4.5/5**. 24h mainland delivery, free 14-day returns. ## Products in this category | Product | Brand | Price | |---|---|---| | [Ritar HR12-96W stationary UPS battery 12V 24Ah AGM](https://baterias.com/gb/) | RITAR | 133,00 € | | [Ritar HR12-70W stationary UPS battery 12V 18Ah AGM](https://baterias.com/gb/) | RITAR | 79,04 € | | [Ritar HR12-80W stationary UPS battery 12V 20Ah AGM](https://baterias.com/gb/) | RITAR | 99,96 € | | [Ritar HR12-50W stationary UPS battery 12V 14Ah AGM](https://baterias.com/gb/) | RITAR | 67,24 € | | [Ritar HR12-48WB stationary UPS battery 12V 12Ah AGM](https://baterias.com/gb/) | RITAR | 60,23 € | | [Ritar HR12-36W stationary UPS battery 12V 9Ah AGM](https://baterias.com/gb/) | RITAR | 49,08 € | | [Ritar HR12-32W stationary UPS battery 12V 8Ah AGM](https://baterias.com/gb/) | RITAR | 48,32 € | | [Ritar HR12-28W stationary UPS battery 12V 7Ah AGM](https://baterias.com/gb/) | RITAR | 44,64 € | | [Ritar HR12-20W stationary UPS battery 12V 5Ah AGM](https://baterias.com/gb/) | RITAR | 38,97 € | | [Ritar HR12-20BW stationary UPS battery 12V 5Ah AGM](https://baterias.com/gb/) | RITAR | 50,52 € | | [Ritar HR12-150W stationary UPS battery 12V 40Ah AGM](https://baterias.com/gb/) | RITAR | 169,81 € | | [Ritar HR12-125W stationary UPS battery 12V 33Ah AGM](https://baterias.com/gb/) | RITAR | 135,85 € | | [Ritar HR12-104W stationary UPS battery 12V 26Ah AGM](https://baterias.com/gb/) | RITAR | 138,45 € | ## 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 · 2026-08-05*