# Deep-cycle battery MK Powered M55-12 SLD M 12V 55Ah AGM

![Deep-cycle battery MK Powered M55-12 SLD M 12V 55Ah AGM](https://baterias.com/290-home_default/battery-mk-m55-12-sld-m-12v-55ah.jpg)

> MK Powered M55-12 SLD M deep-cycle battery 12V 55Ah AGM. Designed for deep discharges (80% DOD); ideal for solar, marine, caravan. 24 h delivery.

**Category:** [Power Wheelchair Batteries](https://baterias.com/gb/batteries-for-electric-wheelchairs) → [MK POWERED](https://baterias.com/gb/mk-powered)

- **Canonical URL**: https://baterias.com/gb/battery-mk-m55-12-sld-m-12v-55ah
- **Language**: en-GB
- **Brand**: MK POWERED
- **Reference**: BCOM-MK-M55-12 SLD M
- **MPN**: M55-12 SLD M
- **Price**: 198,48 €
- **Stock**: Out of stock

## Technical specifications

| Feature | Value |
|---|---|
| Brand | MK |
| Reference | M55-12 SLD M |
| Model | MK AGM |
| Voltaje | 12 V |
| Largo | 226 mm |
| Ancho | 135 mm |
| Alto | 214 mm |
| Tecnología | AGM |
| Terminal | M6 |
| Capacidad C20 (Ah) | 55 Ah (c20) |

## Quick description

**MK Powered M55-12 SLD M 12V 55Ah** is a deep-cycle battery built to be discharged and recharged daily without losing capacity. Its reinforced grid and AGM/GEL separator extend the number of useful cycles well beyond a conventional starter battery.

### Why this deep-cycle battery?

- **Daily cycling without wear** handles deep discharges without losing capacity
- **Sealed AGM/GEL** no maintenance, no risk of spills
- **Thousands of useful cycles** over its full lifetime

🔌 Voltage
12 V

⚡ Capacity
55 Ah C20

📏 Dimensions
226×135×214 mm

⚙️ Technology
AGM

🏷️ Model
MK AGM

## Description

## Battery MK M55-12 SLD M 55Ah 12V

The Battery MK M55-12 SLD M 55Ah 12V AGM belongs to the AGM Powered batteries range

AGM MK batteries are batteries designed for a less demanding type of mobility.They do not have the same performance as MK gel batteries but offer a lower initial cost and perfectly meet the needs of certain mobility applications.

### Ideal for:

- Electric wheelchair

- Scooter type wheelchair

- Other mobility devices

### Battery advantages and characteristics MK M55-12 SLD M 55Ah 12V

- Spill -proof

- Vibrations resistant

- Self -Desar Index less than 2 % per month that allows a minimum deterioration during transport and storage

- Free of mantenimient

- Constant and reliable performance in the long term

**For considerable daily use it is more advisable to use high performance gel batteries**

### How to find the right battery for your vehicle or device?

Mobility systems promoted by batteries offer users greater freedom and independence.However, no mobility vehicle, ingeniously designed, can reach its maximum potential without a high quality battery as a source of energy.
Actually, selecting the right battery for your equipment can improve both your performance and safety, facilitate loading and maintenance, and in the long run, help you save time, money and concerns.

Name**MK**It is a guarantee that you will have the best battery for your conventional electric wheelchair, scooter type wheelchair or other mobility device, because they have an inherently safer design and really do not need any maintenance type in addition to having a useful lifesignificantly greater.

Check the manufacturer's recommendation and the required specifications, if you are not sure what drums you need, do not hesitate to contact us and we will be happy to advise you.

### Why choose an MK Powered battery?

Simply because I is the worldwide leader of agm batteries and gel for mobility vehicles.

### Know more about MK Powered

MK offers the highest quality and the most responsible battery solutions with the environment for specialized applications of deep cycle and reserve energy.It is a brand that offers one of the most reliable products, world -class service and support.

The most prestigious manufacturers of mobility vehicles, choose MK batteries to equip their new vehicles.
In addition, it is the most advanced manufacturer in environmental protection throughout the industry, since since 1946, the MK Battery parent company, East Penn Manufacturing, has made the recycling safe a daily practice.

## Frequently asked questions

### Is the MK Powered M55-12 SLD M an AGM battery and what are the benefits of AGM?

Yes. The M55-12 SLD M from MK Powered uses AGM (Absorbent Glass Mat) technology: a sealed lead-acid battery where the electrolyte is absorbed in a glass-fibre mat. It withstands more charge/discharge cycles than a conventional one, handles heat better and is the required technology for devices with advanced Start-Stop and regenerative braking. Expected lifespan: 5-8 years under normal conditions.

### How do I know if the M55-12 SLD M model fits my device?

Three ways: 1) enter your number plate in the finder (DGT/DVLA/KBA auto-detect your model and engine); 2) check the "Compatible vehicles" tab on this page, where we list every vehicle verified by our technical team for the M55-12 SLD M; 3) if you cannot find your model, message us on WhatsApp with brand, model, engine and year — we reply during business hours (Mon–Fri 9:00–18:00 CET).

### How do I fit the M55-12 SLD M model in my device?

In most devices it fits in 15-30 minutes with a 10 mm wrench; if the battery is under the seat or in the boot the time can double. See the step-by-step guide on this page. Quick summary: 1) switch off the engine and remove the key; 2) locate the original battery (engine bay, boot or under seat); 3) disconnect the negative (−) terminal first, then the positive (+); 4) loosen the hold-down clamp and remove the old battery; 5) fit the new one in the same orientation — match the polarity shown on the product sheet; 6) connect the positive (+) first, then the negative (−). On devices with Start-Stop or BMS, register the battery via OBD so the alternator applies the correct charging profile.

### What warranty does the MK Powered M55-12 SLD M battery have?

We provide 2 years of official manufacturer warranty against manufacturing defects. It covers cell failures, internal short-circuits and abnormal capacity drops. It does NOT cover misuse (prolonged overcharging, inadequate charger, defective alternator). On confirmed defect after technical inspection, we replace the M55-12 SLD M model at no cost.

### What is the delivery time for this battery?

In mainland Spain and Portugal it arrives in 24 h if you order before 17:00 and the battery is in stock — it leaves the same day and arrives the next business day. Afternoon or weekend orders ship the next business day. For Balearics, Canaries and other EU destinations, allow 2-5 days. Shipping cost is calculated in the cart based on destination and service (standard, express, cash on delivery). Tracking number is sent by email + SMS as soon as the parcel ships.

### Can I return the MK Powered M55-12 SLD M battery if it doesn't fit or doesn't work?

Yes. You have 14 days from delivery to return it. In mainland Spain and Portugal returns are FREE — we cover the return shipping cost via prepaid label. In other EU countries the return shipping cost is the customer's. It must arrive in its original packaging with no signs of installation. If it was defective, the warranty covers replacement even after the 14-day period.

### How much does the MK Powered M55-12 SLD M battery cost?

The current price at baterias.com is 198,48 € (VAT included; 164,03 € excl. VAT), updated every 24 hours. The applicable VAT may vary with the destination country and is confirmed in the cart. Shipping cost is calculated in the cart based on destination and chosen service (standard, express, cash on delivery).

### Where can I buy the MK Powered M55-12 SLD M battery?

At baterias.com — authorised distributor with real stock, 24h delivery in mainland Spain and Portugal if you order before 17:00, and full manufacturer warranty. Shipping cost is calculated in the cart based on destination and chosen service (standard, express, cash on delivery). Secure payment by card, Bizum, PayPal or bank transfer. If you choose at-home installation, our technician will take the used battery and dispose of it through an authorised collection point.

### What is the service life of the M55-12 SLD M model?

Expected lifespan of the MK Powered M55-12 SLD M is 5 to 8 years in mild-climate device use with Start-Stop. In cold regions it drops slightly due to cold-start stress; in very hot regions it also drops because of electrolyte evaporation. To extend its life: avoid deep discharges (headlights on with engine off), have the alternator checked yearly, and keep the battery clean and properly secured.

### What are the dimensions of the MK Powered M55-12 SLD M battery?

Dimensions (length × width × height) are 226×135×214 mm — also written as 226x135x214 mm — following the European DIN standard. Always measure the space in your device before buying: even one extra millimetre can prevent the hold-down clamp from closing. The height shown includes the terminals.

### How much does the MK Powered M55-12 SLD M battery weigh?

It weighs 17 kg. Most of the weight is lead. If you plan to fit it yourself, use gloves and a carrying strap (AGM batteries are slightly heavier than conventional due to the absorbent glass-mat fibre).

### How many amps does the MK Powered M55-12 SLD M battery have?

Nominal capacity 55 Ah[?cca: and [cold-cranking amps A]] at 12 V. Ah measure the total energy available (autonomy); CCA (also written A in cold or EN under the European standard) measure the instantaneous power to crank the starter motor. A battery with more CCA starts better in winter; one with more Ah keeps accessories on for longer.

### Which batteries are equivalent to the MK Powered M55-12 SLD M?

Directly interchangeable batteries (same dimensions, same polarity, same Ah and CCA) are the OEM equivalents from leading brands: Bosch, Tudor, Exide and, depending on the model, Banner or Yuasa. Exact equivalence depends on technology — an EFB cannot be replaced with a conventional battery in Start-Stop devices. See the "Equivalents" section to view recommended options at the same performance level.

### Which is better: MK Powered M55-12 SLD M or an alternative from another brand?

This battery and its equivalents from Bosch, Tudor or Exide are technically comparable: same dimensions, same voltage and same capacity. The differences are warranty (Varta and Bosch: 2 years; Tudor and Exide: 2 years on the equivalent line), manufacturing plant (Varta and Bosch share origin in the Clarios Group; Tudor and Exide belong to Exide Technologies) and price. For private use any of these brands will give 4-6 years of life. Compare them in the "Equivalents" section.

### What real-world experiences are there with this battery?

The average rating of the MK Powered M55-12 SLD M on baterias.com is 4.79/5 from 28 verified customer reviews. The product rating, when available, is shown on the product page next to the stars. You can also check our public Trustpilot profile at shop level (4.4/5 from 10,650+ verified reviews). Most-praised points: reliable cold start, lifespan above 5 years and fast delivery; most common complaints mention BMS-equipped devices that need OBD registration after fitting.


## Reviews

- **Average rating**: 4.79 / 5 (28 reviews)

## Technical team (editorial authorship)

The FAQs, guides and comparisons on this site are reviewed by the baterias.com technical team — over 25 years of experience validating automotive batteries.

→ https://baterias.com/gb/technical-team

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*baterias.com — Automotive batteries · 2026-07-15*