# Front-terminal telecom batteries > Over 20 front terminal AGM batteries for telecoms from Ritar FT and Long, in 12V and 2V and from 55 to 600 Ah. Final price with VAT and 14-day returns. **Category:** [Beginning](https://bateriasonline.es/en/) → [Battery types: starter, deep cycle, traction and stationary](https://bateriasonline.es/en/batteries) → [Stationary VRLA batteries: AGM and GEL](https://bateriasonline.es/en/stationary-batteries) - **Canonical URL**: https://bateriasonline.es/en/front-terminal-telecom-batteries - **Language**: en ## Description Batteries with front terminals for rack installation, such as Ritar FT12-150 or FT12-180; buy online with the shipping cost shown upfront. In a base station, a fibre node or an equipment room, space and access set the rules. **Front-terminal batteries** are long, slim 12 V AGM blocks with both posts on the front face, built to slide into **19" and 23"** racks and form 48 V strings. We carry front-terminal series from RITAR and LONG. ## Why the front-terminal layout helps With the posts at the front, installation and inspections are done without pulling the shelf out of the rack: torquing, measuring and swapping all happen from the aisle. Their low, long profile also uses cabinet depth well and lets several rows stack in little height. That is why the format is standard in mobile networks, cable systems, railway signalling and outdoor cabinets. ## Building a 48 V system Telecom equipment runs on direct current, typically **48 V nominal**. Four 12 V blocks in series provide it; more runtime means extra parallel strings, each with identical capacity and age. The rectifier holds them on float and should offer **temperature compensation**, especially in outdoor enclosures where the battery swings from cold nights to midday heat. Heat matters more than cold here. A sun-exposed cabinet without ventilation can keep the string well above 25 °C for months, and that ages the plates far faster than the design life printed on the datasheet assumes. ## What to check before ordering - **Rack width**: 19" or 23"; block length must suit the shelf. - **Depth and height**: these cap the maximum capacity per row. - **Connection**: M6 or M8 thread and the type of terminal cover; inter-block links must match the post spacing. - **Capacity**: front-terminal models run roughly from 50 to 200 Ah. See the [RITAR](https://bateriasonline.es/en/ritar-batteries) and [LONG](https://bateriasonline.es/en/long-batteries) ranges or go back to [stationary batteries](https://bateriasonline.es/en/stationary-batteries). ## Telecom battery FAQ ### Can I use a front-terminal battery in a UPS? Yes, if voltage, capacity and connections are compatible. Many rack-mount UPS units use this format because it is easy to service. ### How often should they be checked? A periodic check of per-block voltage, temperature and connection torque catches a weak unit before it drags down the whole string. ### Can I extend an existing bank with new blocks? Preferably as a separate, complete parallel string. New and used blocks mixed in one series string share the charge badly. ## Choose by brand The same front-terminal telecom batteries, filtered by manufacturer. Each brand has its own page with all its references and a buying guide. - [Ritar batteries](https://bateriasonline.es/en/ritar-batteries) (13) - [Long batteries](https://bateriasonline.es/en/long-batteries) (12) - [Fulbat batteries](https://bateriasonline.es/en/fulbat-batteries) (2) ## Products in this category | Product | Brand | Price | |---|---|---| | [Ritar FT12-100A · Telecom battery 12V 100Ah](https://bateriasonline.es/en/ritar-ft12-100a) | Ritar | 307,69 € | | [Ritar FT12-100S · Telecom battery 12V 100Ah](https://bateriasonline.es/en/ritar-ft12-100s) | Ritar | 347,61 € | | [Ritar FT12-105 · Telecom battery 12V 105Ah](https://bateriasonline.es/en/ritar-ft12-105) | Ritar | 359,95 € | | [Ritar FT12-110 · Telecom battery 12V 110Ah](https://bateriasonline.es/en/ritar-ft12-110) | Ritar | 384,65 € | | [Ritar FT12-125 · Telecom battery 12V 125Ah](https://bateriasonline.es/en/ritar-ft12-125) | Ritar | 477,55 € | | [Ritar FT12-150 · Telecom battery 12V 150Ah](https://bateriasonline.es/en/ritar-ft12-150) | Ritar | 462,95 € | | [Ritar FT12-160A · Telecom battery 12V 160Ah](https://bateriasonline.es/en/ritar-ft12-160a) | Ritar | 487,55 € | | [Ritar FT12-180 · Telecom battery 12V 180Ah](https://bateriasonline.es/en/ritar-ft12-180) | Ritar | 536,84 € | | [Ritar FT12-185 · Telecom battery 12V 185Ah](https://bateriasonline.es/en/ritar-ft12-185) | Ritar | 594,08 € | | [Ritar FT12-200 · Telecom battery 12V 200Ah](https://bateriasonline.es/en/ritar-ft12-200) | Ritar | 660,81 € | | [Ritar FT12-260 · Telecom battery 12V 260Ah](https://bateriasonline.es/en/ritar-ft12-260) | Ritar | 991,56 € | | [Ritar FT12-55 · Telecom battery 12V 55Ah](https://bateriasonline.es/en/ritar-ft12-55) | Ritar | 219,14 € | | [Ritar FT12-90 · Telecom battery 12V 90Ah](https://bateriasonline.es/en/ritar-ft12-90) | Ritar | 304,88 € | --- *bateriasonline.es — Batteries and accessories · 2026-11-10*