# Long WPL40-12 · UPS battery 12V 40Ah

![Long WPL40-12 · UPS battery 12V 40Ah](https://bateriasonline.es/1080-home_default/long-wpl40-12.jpg)

> Long WPL40-12: 40 Ah UPS battery, 199×166×171 mm, AGM. Equivalent to Fulbat FP12-40 and Fulbat FP12-40FR. Price on request: ask for a free quote.

**Category:** [UPS batteries](https://bateriasonline.es/en/ups-batteries) → [Long](https://bateriasonline.es/en/long-batteries)

- **Canonical URL**: https://bateriasonline.es/en/long-wpl40-12
- **Language**: en
- **Brand**: Long
- **Reference**: BOL-LONG-WPL40-12
- **MPN**: WPL40-12
- **Last updated**: 2026-11-06

## Technical specifications

| Feature | Value |
|---|---|
| Brand | Long |
| Range | WPL Series |
| Application | UPS systems |
| Technology | AGM |
| Voltage | 12 V |
| Capacity | 40 Ah |
| Length | 199 mm |
| Width | 166 mm |
| Height | 171 mm |
| Weight | 13.5 kg |

## Quick description

Long WPL40-12: UPS battery with 12 V and 40 Ah, measuring 199 × 166 × 171 mm.

## Description

## The Long WPL40-12 at a glance

The Long WPL40-12 is a VRLA AGM battery for UPS and uninterruptible power systems: it stays charged for years waiting for an outage and delivers the energy instantly when it comes. The WPL40-12 spends most of its life on float charge, waiting for a power cut.
The WPL40-12 belongs to the Long WPL Series range. [The full range of Long batteries](https://bateriasonline.es/en/long-batteries)

## AGM technology in the WPL40-12

The WPL40-12 is AGM: the electrolyte is absorbed in glass fibre mats, so it is sealed and spill-proof. It withstands many more cycles than a conventional lead battery, at the cost of being more sensitive to overcharging.

## Long WPL40-12 vs WPL45-12 and WPL45-12N

The real differences between the WPL40-12 and the closest Long models:

| Model | Capacity | Dimensions (mm) | Weight |
|---|---|---|---|
| Long WPL40-12 (this one) | 40 Ah | 199 × 166 × 171 | 13.5 kg |
| Long WPL45-12 | 45 Ah | 199 × 166 × 171 | 14.6 kg |
| Long WPL45-12N | 45 Ah | 199 × 166 × 171 | 14.6 kg |

- Long WPL45-12: 5 Ah more, the same dimensions.
- Long WPL45-12N: 5 Ah more, the same dimensions.

## Equivalents and alternatives to the Long WPL40-12

Other AGM batteries that fit the WPL40-12'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 |
| Q-Battery 12LS-38 | AGM | 38 Ah | 197 × 165 × 170 |
| Long WPS40-12 | AGM | 40 Ah | 199 × 166 × 171 |
| Long WPS40-12N | AGM | 40 Ah | 199 × 166 × 171 |
| Long WPL40-12N | AGM | 40 Ah | 199 × 166 × 171 |

## Part numbers and codes for the Long WPL40-12

The WPL40-12 is listed under these codes on labels, in garages and in catalogues:

| Commercial reference | WPL40-12 |
|---|---|
| Not to be confused with | Long WP40-12 (40 Ah), Long WPL45-12 (45 Ah), Long WPL50-12 (50 Ah) |

## What to look at before buying the WPL40-12

- Your current battery should say about 40 Ah; a little more is also fine.
- The WPL40-12 needs 199 × 166 × 171 mm of space: measure it with the hold-down clamp in place.

## Frequently asked questions about the Long WPL40-12

### WPL40-12 or WPL45-12: which one suits me?

Compared with the WPL40-12, the Long WPL45-12 has 5 Ah more. With 45 Ah, the WPL45-12 runs longer between charges than the WPL40-12 (40 Ah). Both measure 199 × 166 × 171 mm, so they fit the same tray.

### How much does the Long WPL40-12 weigh?

13.5 kg, with 40 Ah of capacity. For reference, the Long WPL45-12 (45 Ah) weighs 14.6 kg.

### Which battery is equivalent to the Long WPL40-12?

Only other AGM batteries with its dimensions and polarity: Fulbat FP12-40, Fulbat FP12-40FR and Q-Battery 12LS-38. Neither an EFB nor a conventional battery replaces the WPL40-12.

### Which charger does the Long WPL40-12 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.

## More batteries to compare with the WPL40-12

- [More uPS batteries](https://bateriasonline.es/en/ups-batteries)
- [Full Long catalogue](https://bateriasonline.es/en/long-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 · 2026-11-10*