# Wheelchair battery MK Powered 8A22NF 12V 55Ah AGM ![Wheelchair battery MK Powered 8A22NF 12V 55Ah AGM](https://baterias.com/180-home_default/battery-mk-8a22nf-12v-55ah.jpg) > MK Powered 8A22NF wheelchair battery 12V 55Ah AGM. Dimensions 243Γ—138Γ—234 mm. Deep-cycle and sealed, for daily wheelchair and mobility scooter use. **Category:** [Power Wheelchair Batteries](https://baterias.com/gb/batteries-for-electric-wheelchairs) β†’ [MK POWERED](https://baterias.com/gb/mk-powered) - **Canonical URL**: https://baterias.com/gb/battery-mk-8a22nf-12v-55ah - **Language**: en-GB - **Brand**: MK POWERED - **Reference**: BCOM-MK-8A22NF - **MPN**: 8A22NF - **Stock**: Out of stock ## Technical specifications | Feature | Value | |---|---| | Brand | MK | | Reference | 8A22 NF | | Model | MK AGM | | Voltage (V) | 12 V | | Largo | 243.8 mm | | Ancho | 138.9 mm | | Alto | 234.7 mm | | Peso | 16.78 kg | | TecnologΓ­a | AGM | | Capacity (C20) | 55 Ah (c20) | | Capacity (C10) | 51 Ah (c10) | | Capacity (C5) | 46.5 Ah (c5) | ## Quick description **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 wear** handles deep discharges without losing capacity - **Sealed AGM/GEL** no maintenance, no risk of spills - **Thousands of useful cycles** over its full lifetime πŸ”Œ Voltage 12 V ⚑ Capacity 55 Ah C20 πŸ“ Dimensions 243Γ—138Γ—234 mm βš™οΈ Technology AGM βš–οΈ Weight 16,78 kg 🏷️ Model MK AGM ## Description ## Mobility battery MK Powered 8A22NF Mk AGM 55Ah 12V 12*V* Voltage 55*Ah* Capacity 16.78*kg* Weight 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 Γ— 138 Γ— 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 Γ— 138 Γ— 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 [[ks:cutoff]]** 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 **[[ks:return_days]] days** to return it if it has not been installed, with free collection on the mainland, and shipment tracking by email. ## 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 (βˆ’) 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 β€” match the polarity shown on the product sheet; 6) connect the positive (+) first, then the negative (βˆ’). 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 Γ— width Γ— height) are 244Γ—139Γ—235 mm β€” also written as 244x139x235 mm β€” 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 β€” 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. ## Reviews - **Average rating**: 4.74 / 5 (45 reviews) ## Technical team (editorial authorship) The FAQs, guides and comparisons on this site are reviewed by the baterias.com technical team β€” over 25 years of experience validating automotive batteries. β†’ https://baterias.com/gb/technical-team --- *baterias.com β€” Automotive batteries Β· 2026-10-05*