Mk powered 8A22NF · Wheelchair battery 12V 55Ah AGM
Specifications
| Brand | MK POWERED |
|---|---|
| Part number | 8A22NF |
| Voltage (V) | 12 |
| Capacity (C20) | 55Ah (c20) |
| Capacity (C10) | 51Ah (c10) |
| Capacity (C5) | 46.5Ah (c5) |
| Technology | AGM |
| Length | 243.80 mm |
| Width | 138.90 mm |
This product is priced on demand to offer you the best available price at all times.
Please contact us to request a quote and we will inform you about availability and the best price on the entire website, as well as the delivery time.
Thank you
4,74/5★★★★★44 reviewsVerified purchases
- ★★★★Sergio Marquez:
Gracias por el asesoramiento
- ★★★★Andres Ferrer:
Agradezco que me asesoraran de cómo instalar la batería que compré
- ★★★★★Xavier Lorenzo:
Gracias a vosotros pude instalar la batería en mi coche
MK Powered 8A22NF 12V 55Ah is a sealed AGM/GEL battery for daily mobility use: maintenance-free, no risk of spills, and thousands of useful cycles well beyond a starter battery.
Why this wheelchair battery?
- Daily cycling without wearhandles deep discharges without losing capacity
- Sealed AGM/GELno maintenance, no risk of spills
- Thousands of useful cyclesover its full lifetime
Voltage
12 V
Capacity
55 Ah
Dimensions
243×138×234 mm
Technology
AGM
Weight
16,78 kg
Model
MK AGM
Free quote, no obligation
Request a quote for your Wheelchair battery MK Powered 8A22NF 12V 55Ah AGM
- Reply in under 24 working hours
- Best price guaranteed
Mobility battery MK Powered 8A22NF Mk AGM 55Ah 12V
12VVoltage
55AhCapacity
16.78kgWeight
The 12 V, 55 Ah MK Powered 8A22NF from the Mk AGM range with AGM technology is the standard replacement for power wheelchairs, mobility scooters and light electric vehicles. It measures 243 × 138 × 234 mm, the format sought by anyone replacing a 55 Ah battery in power wheelchairs and mobility scooters.
- Standard replacement format for wheelchairs and scooters.
- Thousands of useful cycles over its lifetime.
- Designed to be discharged and recharged daily without losing capacity.
- AGM technology: absorbed electrolyte, no spills, can be mounted at an angle.
What the MK Powered 8A22NF is for
With 55 Ah, the MK Powered 8A22NF offers the daily range that power wheelchairs, mobility scooters and light electric vehicles need, with a sealed construction that is safe indoors. Check that it matches your current battery in dimensions, terminals and hold-down: this reference has a weight of 16.78 kg.
Will it fit your current battery tray?
The MK Powered 8A22NF is made in the 243 × 138 × 234 mm format and weighs 16.78 kg. Checking the three dimensions and the terminal position before buying avoids the most common mistake when replacing a battery.
What MK Powered does differently
MK Battery (MK Powered) is the US specialist in AGM and GEL batteries for mobility: power wheelchairs, scooters and medical equipment rely on its batteries for safety and cycle life. All the MK Powered batteries in our catalogue are genuine product, recently manufactured and covered by the manufacturer's warranty.
The MK Powered 8A22NF: Mk AGM range and AGM technology
Within the MK Powered catalogue, the Mk AGM series groups the references designed for this use. The 8A22NF is the 55 Ah model of that family, with the same performance as its siblings in other sizes.
In an AGM battery the electrolyte is absorbed in glass-fibre separators: there is no free liquid, it cannot spill and it can be mounted at an angle. That construction lowers internal resistance, speeds up recharging and multiplies cycle life compared with a conventional battery.
Care and maintenance
Recharge the wheelchair or scooter after each use and do not leave it discharged for days: lead sulphates and loses capacity. Charge with a charger that has an AGM mode: it limits the voltage and protects the glass-fibre separators.
Warranty and coverage
The MK Powered 8A22NF comes with the manufacturer's official warranty against manufacturing defects. If it fails through a defect within the warranty period, we replace it at no cost to you.
Delivery times and returns
Order before 6:00 pm with stock available and it leaves today: mainland Spain and Portugal receive it in 24-48 working hours, the islands and the rest of the EU in 3 to 5 days. You have 14 days to return it if it has not been installed, with free collection on the mainland, and shipment tracking by email.
BCOM-MK-8A22NF
Data sheet
- Brand
- MK
- Reference
- 8A22NF
- Model
- MK AGM
- Voltage (V)
- 12
- Length
- 243.80 mm
- Width
- 138.90 mm
- Height
- 234.70 mm
- Weight
- 16.78 Kgs
- Technology
- AGM
- Capacity (C20)
- 55Ah (c20)
- Capacity (C10)
- 51Ah (c10)
- Capacity (C5)
- 46.5Ah (c5)
Specific References
- MPN
- 8A22NF
4,74/5
Verified purchasesLatest verified reviews
★★★★★Sergio Marquez
06/05/2026Resolvieron mis dudas
Gracias por el asesoramiento
★★★★★Andres Ferrer
18/02/2026Te indican cómo hacer la instalación
Agradezco que me asesoraran de cómo instalar la batería que compré
★★★★★Xavier Lorenzo
12/02/2026Gracias
Gracias a vosotros pude instalar la batería en mi coche
★★★★★Alfredo Vidal
19/01/2026Rápido y correcto
Me alegra que cumplen con los tiempos de envío
Recommended accessories
How to change the battery
Guide to replace a cyclic battery (12V 4-30Ah) for UPS, mobility scooter, alarm or backup device. Estimated time 10-15 minutes. Important: discharge residual voltage before handling.
Step 1. Power off and unplug the device
Unplug the device (UPS, scooter, alarm) and leave it off for at least 30 seconds to discharge residual capacitor voltage. Work on an insulating surface.
Step 2. Locate the battery compartment
Usually under the seat (mobility scooter/wheelchair), in the rear module of the UPS, or behind a side panel with screws. Check the device manual for unusual models.
Step 3. Disconnect the negative (−) first
With insulated gloves, remove the negative (−) cable first. Some UPS have protection fuses — note their position before removing.
Step 4. Disconnect the positive (+) terminal
Repeat with the positive cable (red, marked +). Important: never let a terminal touch metal of the car while the other is still connected.
Step 5. Remove the old battery
Typical weight 1-15 kg depending on capacity. Many cyclic batteries are AGM/GEL — keep them upright. Do NOT invert the battery: even sealed, residue may exist.
Step 6. Fit the new battery
Same orientation and type (AGM, GEL or flooded). Polarity must match the device, not a chassis (this is not a car). Make sure terminals do not touch metal parts of the compartment.
Step 7. Connect the positive (+) first
On cyclic devices the order is reversed compared to cars: positive (+) first, negative (−) afterwards. Tighten without forcing — the plastic terminal housing of cyclic batteries damages easily.
Step 8. Initial charge before first use
Cyclic batteries ship at 60-80%. Before first use, connect the device charger for 8-12 hours (or use an AGM/GEL smart charger if available). This avoids short cycles and extends lifespan.
Frequently asked questions
Is the MK Powered 8A22NF an AGM battery and what are the benefits of AGM?
Yes. The 8A22NF 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 fit the 8A22NF 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.
How long does the MK Powered 8A22NF battery last?
Expected lifespan of the MK Powered 8A22NF 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 measurements of the 8A22NF model?
Dimensions (length × width × height) are 244×139×235 mm — also written as 244x139x235 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.
Which batteries are equivalent to the MK Powered 8A22NF?
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.
The top-rated online battery store in Spain
-
Audited by Trustpilot, no filters, no edits. The top-rated battery store in Spain.
Trustpilot · verified, no filters
-
Official Varta distributor
Official Varta wholesale distributor. 100% genuine batteries, recently manufactured, best price and no middlemen.
World’s best-selling battery brand
-
+100,000 satisfied customers
More than 100,000 customers already trust baterias.com — and recommend us to their friends and family.
They trust us and recommend us
Choose trust, choose quality, choose baterias.com.