# Wheelchair battery MK Powered 8G22NF 12V 51Ah GEL ![Wheelchair battery MK Powered 8G22NF 12V 51Ah GEL](https://baterias.com/189-home_default/battery-mk-8g22nf-12v-51ah.jpg) > MK Powered 8G22NF wheelchair battery 12V 51Ah GEL. Dimensions 228×138×235 mm. Deep-cycle and sealed, for daily wheelchair and mobility scooter use. **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-8g22nf-12v-51ah - **Language**: en-GB - **Brand**: MK POWERED - **Reference**: BCOM-MK-8G22NF - **MPN**: 8G22NF - **Last updated**: 2026-10-28 - **Stock**: Out of stock ## Technical specifications | Feature | Value | |---|---| | Brand | MK | | Reference | 8G22 NF | | Model | MK GEL | | Voltage (V) | 12 V | | Largo | 228.3 mm | | Ancho | 138.9 mm | | Alto | 235.2 mm | | Peso | 17.01 kg | | Tecnología | GEL | | Capacity (C20) | 51 Ah (c20) | | Capacity (C5) | 43.2 Ah (c5) | ## Quick description **MK Powered 8G22NF 12V 51Ah** is a deep-cycle battery for wheelchairs and mobility scooters, optimised to be discharged and recharged daily down to 80 % DOD without losing range. ## 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 🔌 Voltage 12 V ⚡ Capacity 51 Ah C20 📏 Dimensions 228×138×235 mm ⚙️ Technology GEL ⚖️ Weight 17,01 kg 🏷️ Model MK GEL ## Description ## Mobility battery MK Powered 8G22NF Mk GEL 51Ah 12V 12*V* Voltage 51*Ah* Capacity 17.01*kg* Weight Designed for power wheelchairs, mobility scooters and light electric vehicles, the **MK Powered 8G22NF** from the **Mk GEL** range offers **51 Ah** of deep-cycle capacity with GEL technology. Its 228 × 138 × 235 mm make it the exact replacement for the 51 Ah battery fitted as standard to many power wheelchairs and mobility scooters. - Approved for air and sea transport (VRLA). - No maintenance, no water top-ups. - Sealed AGM/GEL: safe indoors and in transport. - GEL: excellent resistance to deep discharge and long cycle life. ### What the MK Powered 8G22NF is for The MK Powered 8G22NF is the usual replacement in power wheelchairs, mobility scooters and light electric vehicles. Recharge after each use and avoid leaving it discharged for days. Check that it matches your current battery in dimensions, terminals and hold-down: this reference has a weight of 17.01 kg. ### Will it fit your current battery tray? The MK Powered 8G22NF is made in the 228 × 138 × 235 mm format and weighs 17.01 kg. For a direct replacement, the current battery tray must accept these dimensions and the same terminal layout; otherwise adapters will be needed or the hold-down will change. ### The MK Powered 8G22NF: Mk GEL range and GEL technology Within the MK Powered catalogue, the **Mk GEL** series groups the references designed for this use. The 8G22NF is the 51 Ah model of that family, with the same performance as its siblings in other sizes. In a GEL battery the electrolyte is gelled with silica: it is fully sealed, cannot spill and tolerates deep discharge very well. It is the preferred technology in electric mobility, marine service and heavy-cycling applications. ### What MK Powered does differently MK batteries are the standard in the electric mobility sector: sealed, approved for air transport and with the consistency that wheelchair manufacturers demand as original equipment. We guarantee that every MK Powered arrives new, charged and with the manufacturer's full warranty. ### Official warranty The MK Powered 8G22NF 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. ### How to make it last longer Use the original charger or one compatible with the battery technology (AGM/GEL) and always replace both batteries in the set together. GEL batteries need lower charging voltages: always use a charger with a GEL mode so as not to damage the electrolyte. ### Shipping, delivery and returns Orders placed **before 6:00 pm** with the battery in stock ship the same day. Delivery in mainland Spain and Portugal takes 24-48 working hours; for the Balearic Islands and the rest of the European Union allow 3 to 5 working days. You have **14 days** to return an unused battery; in mainland Spain and Portugal collection is free. We email you the tracking number as soon as the parcel ships. ## Frequently asked questions ### Is the MK Powered 8G22NF a GEL battery? What is GEL used for? Yes, GEL technology (51 Ah): a sealed lead-acid battery whose electrolyte is in gel form. Its maximum charge voltage is lower than an AGM's, so a GEL-specific smart charger is needed. It tolerates deep discharges very well and is ideal for cyclic use (solar, motorhomes, electric wheelchairs, motorcycles). ### What are the dimensions of the MK Powered 8G22NF battery? Its dimensions are 228×139×235 mm, also written 228x139x235 mm; the height already includes the terminals. Check the room available in your device, because a single millimetre too much can stop the clamp from closing. ### MK Powered 8G22NF or MK Powered M22NF SLD G: which one to choose? It has the same dimensions, voltage and technology as the 8G22NF, although it is not a manufacturer-approved equivalent. Compared with the 8G22NF it has 210 A of cold cranking more. It costs €197.80 more. Check the positive terminal side and the original capacity before ordering; otherwise it is a straight swap. ## Technical team (editorial authorship) The FAQs, guides and comparisons on this site are reviewed by the baterias.com technical team — automotive battery specialists since 2012. → https://baterias.com/gb/technical-team --- *baterias.com — Automotive batteries · 2026-11-06*