# Battery testers

> 9 Motobatt and Fulbat battery testers to check voltage, battery health and the charging system, such as FULTEST 1 or MB-VM. Final price with VAT included.

**Category:** [Beginning](https://bateriasonline.es/en/)

- **Canonical URL**: https://bateriasonline.es/en/battery-testers
- **Language**: en

## Description

Check whether your battery is healthy before replacing it, with a battery tester or a permanent charge indicator.

Before you replace a battery, it pays to know whether it is truly worn or simply flat. A **battery tester** settles that in seconds: it reads voltage, estimates real cranking ability against the rated figure and, on many models, checks the alternator as well.
We sell testers from MOTOBATT and FULBAT for 12 V car, motorcycle and marine batteries.

## What a tester measures

- **Resting voltage**: shows state of charge. With the engine off for several hours, a full 12 V lead battery sits around 12.6–12.8 V; near 12.2 V it is half charged.
- **Conductance or internal resistance**: electronic testers use it to estimate available cold cranking amps (CCA, EN, SAE or DIN) and compare them with the label. That comparison gives the state of health.
- **Cranking test**: logs how far voltage drops while the engine turns over. A very deep dip points to a weak battery or a starter motor drawing too much.
- **Charging system**: with the engine running, voltage should fall within the range the vehicle maker specifies, usually above 13.5 V and not beyond roughly 14.8 V.

## Reading the result

Low voltage with good health means the battery only needs a full charge from a suitable [battery charger](https://bateriasonline.es/en/battery-chargers). If measured CCA stays far below the rating after charging, capacity has gone and replacement is due. Always retest with the battery charged: a reading taken on a flat battery is not conclusive.

## When owning one makes sense

Workshops, fleets, motorcycle dealers and anyone with several vehicles will get good use from one. It flags a failing battery before winter and avoids changing one that is still fine. If a replacement is needed, browse [car batteries](https://bateriasonline.es/en/car-batteries) or the [MOTOBATT](https://bateriasonline.es/en/motobatt-batteries) brand.

## Battery tester FAQ

### Will a multimeter do the same job?

A multimeter reads voltage but cannot tell how much current the battery can deliver. A sulphated battery can show 12.6 V and still fail to crank.

### Do they work with AGM, EFB and lithium batteries?

Electronic testers usually let you choose between flooded, AGM, EFB and GEL. For lithium, check the product sheet for compatibility.

### Must the battery be disconnected to test it?

Usually not. Switch off loads and wait a while so surface charge does not distort the reading.

## Choose by brand

The same battery testers, filtered by manufacturer. Each brand has its own page with all its references and a buying guide.
- [Motobatt batteries](https://bateriasonline.es/en/motobatt-batteries) (6)
- [Fulbat batteries](https://bateriasonline.es/en/fulbat-batteries) (3)

## Products in this category

| Product | Brand | Price |
|---|---|---|
| [Fulbat FULTEST 1 · Battery tester](https://bateriasonline.es/en/fulbat-fultest-1) | Fulbat | 18,77 € |
| [Fulbat FULCONNECT INDICATOR · Battery tester](https://bateriasonline.es/en/fulbat-fulconnect-indicator) | Fulbat | 18,77 € |
| [Fulbat FULTEST 2 · Battery tester](https://bateriasonline.es/en/fulbat-fultest-2) | Fulbat | 94,57 € |
| [Motobatt MB-VM · Battery tester](https://bateriasonline.es/en/motobatt-mb-vm) | Motobatt | 58,75 € |

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