# Deka batteries

> Over 30 Deka 6V and 12V batteries for electric wheelchairs, in GEL, AGM and lead-acid, such as 8G5SHP or DC31DT. Expert advice on \[\[ks:phone\_intl\]\].

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- **Canonical URL**: https://bateriasonline.es/en/deka-batteries
- **Language**: en

## Description

Deka deep cycle batteries for electric wheelchairs, from 31.6 to 370 Ah; buy online with 14-day returns.

Deka batteries for electric wheelchairs and other deep cycle equipment, in GEL, AGM and flooded lead-acid, at 6 and 12 V.
Many chairs run at 24 V on two 12 V blocks wired in series. Read the label on the batteries you have now, note the capacity and dimensions, and look for the same format in this list.

## What to check before choosing a Deka

- **System voltage:** if the equipment runs at 24 V, you need two 12 V blocks or four 6 V ones.
- **Capacity (Ah):** it sets the range. You can only go higher if the battery still fits the compartment.
- **Size and terminal:** check length, width and height, and make sure the connection type matches your equipment's wiring.
- **Technology:** stick to what the chair maker specifies; GEL and AGM do not charge on the same profile.
- **Terminal layout:** note which side the positive sits on; if it is reversed, the leads may not reach.

## GEL, AGM or flooded: which one suits you

For a chair or a [mobility scooter](https://bateriasonline.es/en/mobility-scooter-batteries) used daily and charged every night, GEL and AGM are the sealed options: they do not leak, need no topping up and accept any sensible mounting position. Flooded lead-acid makes more sense in fixed, ventilated equipment with access to the caps. For more options, compare with the rest of our [wheelchair batteries](https://bateriasonline.es/en/electric-wheelchair-batteries) or with the general [deep cycle](https://bateriasonline.es/en/deep-cycle-batteries) section.

## Frequently asked questions

### Should both batteries be replaced together?

Yes. In a series pair, a new battery next to a worn one gets out of balance and shortens the life of both.

### Can I switch from GEL to AGM?

Only if the chair's charger has an AGM mode or can be adjusted. If not, keep the same technology.

### How often should I charge them?

Ideally after every outing, even a short one, and always before storing the chair for a while. A lead battery left flat for days loses capacity it will not get back.
More about the manufacturer on the [Deka brand page](https://bateriasonline.es/en/deka-batteries).

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