# Q-Battery 12LS-2.9 · UPS battery 12V 2.9Ah

![Q-Battery 12LS-2.9 · UPS battery 12V 2.9Ah](https://bateriasonline.es/3701-home_default/q-battery-12ls-2-9.jpg)

> Q-Battery 12LS-2.9: 2.9 Ah UPS battery, 79×56×99 mm, AGM. VAT included and shipping cost shown before you pay.

**Category:** [UPS batteries](https://bateriasonline.es/en/ups-batteries) → [Q-Battery](https://bateriasonline.es/en/q-battery-batteries)

- **Canonical URL**: https://bateriasonline.es/en/q-battery-12ls-2-9
- **Language**: en
- **Brand**: Q-Battery
- **Reference**: BOL-QBATTERY-12LS-2.9
- **EAN**: 4250889610074
- **MPN**: 12LS-2.9
- **Price**: 23,42 € (VAT incl., Spain)
- **Last updated**: 2026-10-27

## Technical specifications

| Feature | Value |
|---|---|
| Brand | Q-Battery |
| Range | AGM STANDARD |
| Application | UPS systems |
| Technology | AGM |
| Voltage | 12 V |
| Capacity | 2.9 Ah |
| Length | 79 mm |
| Width | 56 mm |
| Height | 99 mm |
| Weight | 1.05 kg |
| Terminal type | F1 (4,75 mm) |

## Quick description

The Q-Battery 12LS-2.9 is an UPS battery with 12 V and 2.9 Ah, measuring 79 × 56 × 99 mm.

## Description

## Where the Q-Battery 12LS-2.9 fits

The Q-Battery 12LS-2.9 replaces the original batteries in a UPS. Before ordering the 12LS-2.9, check the terminal type and terminal orientation in your UPS.
The 12LS-2.9 belongs to the Q-Battery AGM STANDARD range. [The full range of Q-Battery batteries](https://bateriasonline.es/en/q-battery-batteries)

## Equivalents and alternatives to the Q-Battery 12LS-2.9

No other reference in the catalogue fully matches the dimensions and polarity of the 12LS-2.9; you will find the closest ones among our [uPS batteries](https://bateriasonline.es/en/ups-batteries).

## Q-Battery 12LS-2.9 vs 12LS-3.4 and 12LS-2.1: which one to choose?

Torn between the 12LS-2.9 and another similar Q-Battery? This is what changes:

| Model | Capacity | Dimensions (mm) | Weight |
|---|---|---|---|
| Q-Battery 12LS-2.9 (this one) | 2.9 Ah | 79 × 56 × 99 | 1.05 kg |
| Q-Battery 12LS-3.4 | 3.4 Ah | 134 × 67 × 60.5 | 1.35 kg |
| Q-Battery 12LS-2.1 | 2.1 Ah | 178 × 35 × 60 | 1 kg |

- Q-Battery 12LS-3.4: 0.5 Ah more, a different case (134 × 67 × 60.5 mm).
- Q-Battery 12LS-2.1: 0.80 Ah less, a different case (178 × 35 × 60 mm).

## Inside the 12LS-2.9: AGM technology

Inside, the 12LS-2.9 has glass fibre separators (AGM) that hold the electrolyte. The 12LS-2.9 needs a charger with an AGM mode that does not exceed 14.7 V.

## What to look at before buying the 12LS-2.9

- The 12LS-2.9 needs 79 × 56 × 99 mm of space: measure it with the hold-down clamp in place.
- Capacity of the 12LS-2.9: 2.9 Ah; the same as your current battery or slightly more is fine.

## Q-Battery 12LS-2.9 codes and part numbers

This is how the Q-Battery 12LS-2.9 appears on the label and in parts catalogues:

| Commercial reference | 12LS-2.9 |
|---|---|
| EAN | 4250889610074 |
| Terminal type | F1 (4,75mm) |
| Not to be confused with | Q-Battery 12LSX-9 (28 Ah), Q-Battery 12LS-2.1 (2.1 Ah), Q-Battery 12LS-24 (24 Ah) |

## Frequently asked questions about the Q-Battery 12LS-2.9

### Q-Battery 12LS-2.9 or 12LS-3.4?

Compared with the 12LS-2.9, the Q-Battery 12LS-3.4 has 0.5 Ah more. With 3.4 Ah, the 12LS-3.4 runs longer between charges than the 12LS-2.9 (2.9 Ah). Mind the space: the 12LS-3.4 measures 134 × 67 × 60.5 mm.

### How much does the Q-Battery 12LS-2.9 weigh?

The 12LS-2.9 weighs 1.05 kg. For reference, the Q-Battery 12LS-3.4 (3.4 Ah) weighs 1.35 kg.

### Which charger does the Q-Battery 12LS-2.9 need?

A charger with an AGM mode that limits voltage to about 14.4-14.7 V. Never an old unregulated charger: overcharging dries out an AGM beyond repair.

## Keep comparing: alternatives to the 12LS-2.9

- [All uPS batteries](https://bateriasonline.es/en/ups-batteries)
- [Full Q-Battery catalogue](https://bateriasonline.es/en/q-battery-batteries)
- [Long WP2.9-12TR](https://bateriasonline.es/en/long-wp2-9-12tr) · 2.9 Ah, 79×56×107 mm

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*bateriasonline.es — Batteries and accessories · 2026-11-10*