# Q-Battery 12LS-38 · UPS battery 12V 38Ah

![Q-Battery 12LS-38 · UPS battery 12V 38Ah](https://bateriasonline.es/3730-home_default/q-battery-12ls-38.jpg)

> Q-Battery 12LS-38: 38 Ah UPS battery, 197×165×170 mm, AGM. Equivalent to Fulbat FP12-40 and Fulbat FP12-40FR.

**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-38
- **Language**: en
- **Brand**: Q-Battery
- **Reference**: BOL-QBATTERY-12LS-38
- **MPN**: 12LS-38
- **Price**: 164,35 € (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 | 38 Ah |
| Length | 197 mm |
| Width | 165 mm |
| Height | 170 mm |
| Weight | 13.2 kg |
| Terminal type | F11 (M6) |

## Quick description

The Q-Battery 12LS-38 is an UPS battery with 12 V and 38 Ah, measuring 197 × 165 × 170 mm.

## Description

## Where the Q-Battery 12LS-38 fits

The Q-Battery 12LS-38 replaces the original batteries in a UPS. Check dimensions, terminal type (F1 or F2) and capacity so it fits the unit.
The 12LS-38 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-38

Other AGM batteries that fit the 12LS-38's tray with the same polarity: an AGM can only be replaced by another AGM.

| Model | Technology | Capacity | Dimensions (mm) |
|---|---|---|---|
| Fulbat FP12-40 | AGM | 40 Ah | 197 × 165 × 170 |
| Fulbat FP12-40FR | AGM | 40 Ah | 197 × 165 × 170 |
| Long WPS40-12 | AGM | 40 Ah | 199 × 166 × 171 |
| Long WPS40-12N | AGM | 40 Ah | 199 × 166 × 171 |
| Long WPL40-12 | AGM | 40 Ah | 199 × 166 × 171 |
| Long WPL40-12N | AGM | 40 Ah | 199 × 166 × 171 |

## Q-Battery 12LS-38 vs 12LS-45 and 12LS-33

Torn between the 12LS-38 and another similar Q-Battery? This is what changes:

| Model | Capacity | Dimensions (mm) | Weight |
|---|---|---|---|
| Q-Battery 12LS-38 (this one) | 38 Ah | 197 × 165 × 170 | 13.2 kg |
| Q-Battery 12LS-45 | 45 Ah | 197 × 165 × 170 | 14.5 kg |
| Q-Battery 12LS-33 | 35 Ah | 195 × 130 × 159 | 10.6 kg |

- Q-Battery 12LS-45: 7 Ah more, the same dimensions.
- Q-Battery 12LS-33: 3 Ah less, a different case (195 × 130 × 159 mm).

## AGM technology in the 12LS-38

Inside, the 12LS-38 has glass fibre separators (AGM) that hold the electrolyte. The 12LS-38 needs a charger with an AGM mode that does not exceed 14.7 V.

## Before ordering the 12LS-38, check this

- The 12LS-38 needs 197 × 165 × 170 mm of space: measure it with the hold-down clamp in place.
- With 38 Ah, the 12LS-38 replaces an original battery of that capacity or slightly less.

## Part numbers and codes for the Q-Battery 12LS-38

This is how the Q-Battery 12LS-38 appears on the label and in parts catalogues:

| Commercial reference | 12LS-38 |
|---|---|
| Terminal type | F11 (M6) |
| Not to be confused with | Q-Battery 12LS-3.4 (3.4 Ah), Q-Battery 12LS-18 (18 Ah), Q-Battery 12LS-33 (35 Ah) |

## Frequently asked questions about the Q-Battery 12LS-38

### 12LS-38 or 12LS-45: which one suits me?

Compared with the 12LS-38, the Q-Battery 12LS-45 has 7 Ah more. With 45 Ah, the 12LS-45 runs longer between charges than the 12LS-38 (38 Ah). Both measure 197 × 165 × 170 mm, so they fit the same tray.

### How much does the Q-Battery 12LS-38 weigh?

13.2 kg, with 38 Ah of capacity. For reference, the Q-Battery 12LS-45 (45 Ah) weighs 14.5 kg.

### Which battery is equivalent to the Q-Battery 12LS-38?

Only other AGM batteries with its dimensions and polarity: Fulbat FP12-40, Fulbat FP12-40FR and Long WPS40-12. Neither an EFB nor a conventional battery replaces the 12LS-38.

### Which charger does the Q-Battery 12LS-38 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.

## Other options if you are unsure about the 12LS-38

- [All uPS batteries](https://bateriasonline.es/en/ups-batteries)
- [Full Q-Battery catalogue](https://bateriasonline.es/en/q-battery-batteries)
- [Fulbat FP12-40](https://bateriasonline.es/en/fulbat-fp12-40) · 40 Ah, 197×165×170 mm
- [Fulbat FP12-40FR](https://bateriasonline.es/en/fulbat-fp12-40fr) · 40 Ah, 197×165×170 mm

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