# Long WP12B-4 · UPS battery 12V 9.5Ah

![Long WP12B-4 · UPS battery 12V 9.5Ah](https://bateriasonline.es/921-home_default/long-wp12b-4.jpg)

> Long WP12B-4: 9.5 Ah UPS battery, 150×69×130 mm, AGM. Ask for a no-obligation quote.

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

- **Canonical URL**: https://bateriasonline.es/en/long-wp12b-4
- **Language**: en
- **Brand**: Long
- **Reference**: BOL-LONG-WP12B-4
- **MPN**: WP12B-4
- **Last updated**: 2026-10-27

## Technical specifications

| Feature | Value |
|---|---|
| Brand | Long |
| Range | Starting Series |
| Application | UPS systems |
| Technology | AGM |
| Voltage | 12 V |
| Capacity | 9.5 Ah |
| Length | 150 mm |
| Width | 69 mm |
| Height | 130 mm |
| Weight | 3.8 kg |

## Quick description

The Long WP12B-4 is an UPS battery with 12 V and 9.5 Ah, measuring 150 × 69 × 130 mm.

## Description

## The Long WP12B-4 at a glance

The Long WP12B-4 replaces the original batteries in a UPS. The WP12B-4 spends most of its life on float charge, waiting for a power cut.
The WP12B-4 belongs to the Long Starting Series range. [The full range of Long batteries](https://bateriasonline.es/en/long-batteries)

## Equivalents and alternatives to the Long WP12B-4

We have no other battery with exactly the dimensions and polarity of the WP12B-4. Browse the rest of our [uPS batteries](https://bateriasonline.es/en/ups-batteries) to compare close options.

## Long WP12B-4 vs WP12-BS, WP1236W and WP1236WT: differences

How the WP12B-4 compares with Long batteries of similar size and capacity:

| Model | Capacity | Dimensions (mm) | Weight |
|---|---|---|---|
| Long WP12B-4 (this one) | 9.5 Ah | 150 × 69 × 130 | 3.8 kg |
| Long WP12-BS | 10 Ah | 151 × 88 × 132 | 4.26 kg |
| Long WP1236W | 9 Ah | 151 × 65 × 102 | 2.7 kg |
| Long WP1236WT | 9 Ah | 151 × 65 × 106 | 2.7 kg |
| Long WP9-BS | 8 Ah | 151 × 88 × 103 | 3.4 kg |

- Long WP12-BS: 0.5 Ah more, a different case (151 × 88 × 132 mm).
- Long WP1236W: 0.5 Ah less, a different height (102 mm instead of 130 mm). It is the option if your battery tray cannot take the 130 mm height of the WP12B-4.
- Long WP1236WT: 0.5 Ah less, a different height (106 mm instead of 130 mm). It is the option if your battery tray cannot take the 130 mm height of the WP12B-4.
- Long WP9-BS: 1.5 Ah less, a different case (151 × 88 × 103 mm).

## Inside the WP12B-4: AGM technology

Inside, the WP12B-4 has glass fibre separators (AGM) that hold the electrolyte. The WP12B-4 needs a charger with an AGM mode that does not exceed 14.7 V.

## Check this before ordering the Long WP12B-4

- Length, width and height of the WP12B-4: 150 × 69 × 130 mm.
- With 9.5 Ah, the WP12B-4 replaces an original battery of that capacity or slightly less.

## Part numbers and codes for the Long WP12B-4

This is how the Long WP12B-4 appears on the label and in parts catalogues:

| Commercial reference | WP12B-4 |
|---|---|
| Not to be confused with | Long WP14B-4 (12 Ah), Long WP12-BS (10 Ah) |

## Frequently asked questions about the Long WP12B-4

### WP12B-4 or WP12-BS: which one suits me?

Compared with the WP12B-4, the Long WP12-BS has 0.5 Ah more. With 10 Ah, the WP12-BS runs longer between charges than the WP12B-4 (9.5 Ah). Mind the space: the WP12-BS measures 151 × 88 × 132 mm.

### Long WP12B-4 or WP1236W/WP1236WT: what changes?

Mainly the height: the WP12B-4 is 130 mm tall and the Long WP1236W 102 mm, with the same length and width and 9 Ah against 9.5 Ah. The Long WP1236WT is 106 mm tall, with 9 Ah and A. Before choosing between the WP12B-4 and the WP1236W, measure the free height of the battery compartment with the cover or bonnet closed.

### How much does the Long WP12B-4 weigh?

3.8 kg, with 9.5 Ah of capacity. For reference, the Long WP12-BS (10 Ah) weighs 4.26 kg.

### Which charger does the Long WP12B-4 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 WP12B-4

- [Other uPS batteries](https://bateriasonline.es/en/ups-batteries)
- [More Long models](https://bateriasonline.es/en/long-batteries)

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