# Long TPK12125 · Telecom battery 12V 125Ah

![Long TPK12125 · Telecom battery 12V 125Ah](https://bateriasonline.es/1010-home_default/long-tpk12125.jpg)

> Long TPK12125: 125 Ah telecom battery, 550×110×288 mm, AGM. Ask for a no-obligation quote.

**Category:** [Front-terminal telecom batteries](https://bateriasonline.es/en/front-terminal-telecom-batteries) → [Long](https://bateriasonline.es/en/long-batteries)

- **Canonical URL**: https://bateriasonline.es/en/long-tpk12125
- **Language**: en
- **Brand**: Long
- **Reference**: BOL-LONG-TPK12125
- **MPN**: TPK12125
- **Last updated**: 2026-10-27

## Technical specifications

| Feature | Value |
|---|---|
| Brand | Long |
| Range | TPK Series |
| Application | Telecom systems |
| Technology | AGM |
| Voltage | 12 V |
| Capacity | 125 Ah |
| Length | 550 mm |
| Width | 110 mm |
| Height | 288 mm |
| Weight | 39 kg |

## Quick description

The Long TPK12125 is a telecom battery with 12 V and 125 Ah, measuring 550 × 110 × 288 mm.

## Description

## Who the Long TPK12125 is for

The Long TPK12125 is a front-terminal battery for telecommunications: a narrow format for 19 and 23 inch racks, with the terminals accessible from the front. Its elongated format allows tray mounting with front connection.
The TPK12125 belongs to the Long TPK Series range. [The full range of Long batteries](https://bateriasonline.es/en/long-batteries)

## Equivalents and alternatives to the Long TPK12125

No other reference in the catalogue fully matches the dimensions and polarity of the TPK12125; you will find the closest ones among our [front-terminal telecom batteries](https://bateriasonline.es/en/front-terminal-telecom-batteries).

## Long TPK12125 vs TPK12150 and TPK12150NA: which one to choose?

How the TPK12125 compares with Long batteries of similar size and capacity:

| Model | Capacity | Dimensions (mm) | Weight |
|---|---|---|---|
| Long TPK12125 (this one) | 125 Ah | 550 × 110 × 288 | 39 kg |
| Long TPK12150 | 150 Ah | 550 × 110 × 288 | 50.5 kg |
| Long TPK12150NA | 150 Ah | 550 × 110 × 288 | 45 kg |

- Long TPK12150: 25 Ah more, the same dimensions.
- Long TPK12150NA: 25 Ah more, the same dimensions.

## What it means that the TPK12125 is AGM

The TPK12125 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.

## Check this before ordering the Long TPK12125

- The TPK12125 needs 550 × 110 × 288 mm of space: measure it with the hold-down clamp in place.
- With 125 Ah, the TPK12125 replaces an original battery of that capacity or slightly less.

## Frequently asked questions about the Long TPK12125

### Long TPK12125 or TPK12150?

Compared with the TPK12125, the Long TPK12150 has 25 Ah more. With 150 Ah, the TPK12150 runs longer between charges than the TPK12125 (125 Ah). Both measure 550 × 110 × 288 mm, so they fit the same tray.

### How much does the Long TPK12125 weigh?

The TPK12125 weighs 39 kg. For reference, the Long TPK12150 (150 Ah) weighs 50.5 kg.

### Which charger does the Long TPK12125 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 TPK12125

- [More front-terminal telecom batteries](https://bateriasonline.es/en/front-terminal-telecom-batteries)
- [More Long models](https://bateriasonline.es/en/long-batteries)

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