# MK batteries > MK Battery premium GEL DEKA: 8GU1H, 8G24, 8G27, 8G31, 8G8DLTP. Permobil Invacare power chair, mobility scooter. No spill. 24h delivery. 14-day returns. **Category:** [Start](https://baterias.com/gb/beginning) → [Batteries](https://baterias.com/gb/batteries) - **Canonical URL**: https://baterias.com/gb/batteries-mk - **Language**: en-GB ## Description **MK Battery**: premium brand of the North American **DEKA East Penn** group, **world reference in GEL for power wheelchairs, mobility scooters, orthopaedic and clinical mobility**. Recommended by most power wheelchair manufacturers (Permobil, Invacare, Sunrise Medical, Pride Mobility, Quickie, Ottobock). Catalogue: **GEL Mobility** 8GU1H, 8G24, 8G27, 8G31 and 8G8DLTP — the standard wheelchair and scooter footprints. **AGM** line for applications where GEL is not strictly required. Real stock, 24h mainland delivery, free 14-day returns. ## MK Battery: premium GEL for assisted mobility MK Battery is part of the North American **DEKA East Penn** group, one of the largest lead-battery manufacturers in the Americas. Its GEL Mobility range is the **de facto standard** for power wheelchairs and mobility scooters in Europe and the Americas: most makers (Permobil, Invacare, Sunrise Medical, Pride Mobility, Quickie, Ottobock, Meyra, Levo) homologate or directly recommend MK Battery as the OEM replacement. GEL is the right chemistry for assisted mobility because it **does not spill in any orientation** (chair tipped during airline transport, ambulance, scooter on a slope), **tolerates daily deep cycling** without premature ageing and accepts slow charge / prolonged discharge — exactly the usage pattern of a user covering 10-25 km a day. A car AGM in this duty dies in 6-12 months; an MK GEL lasts 2-4 years in heavy use. ## MK Battery range Model Technology Voltage × capacity Typical application MK 8GU1H GEL 12V × 32 Ah Small-to-mid mobility scooter MK 8G22NF GEL 12V × 50 Ah Mid scooter, compact wheelchair MK 8G24 GEL 12V × 73 Ah (20h) Standard power wheelchair MK 8G27 GEL 12V × 86 Ah (20h) Mid power wheelchair MK 8G31 GEL 12V × 97 Ah (20h) Large/bariatric power wheelchair MK 8G8DLTP GEL 12V × 245 Ah Bariatric chair, long-range scooter MK ES17-12 AGM 12V × 18 Ah Small scooter, heavy ride-on toy ### MK by application - MK 8G24 — best-selling model. 12V 73Ah GEL, standard wheelchair footprint. - MK 8G27 — 12V 86Ah GEL for mid wheelchair and mid-to-high scooter. - MK 8G31 — 12V 97Ah GEL for large or bariatric chair, long-range scooter. - MK 8GU1H — 12V 32Ah GEL for small-to-mid scooter and folding models. - MK 8G8DLTP — 12V 245Ah GEL bariatric, extended autonomy and clinical mobility. ### Why MK GEL rather than AGM Both are sealed and maintenance-free, but mobility has critical differences: **GEL** handles more deep cycles (1,000+ at 50% DoD vs ~600 in AGM), works better at the higher temperatures inside a chair shell, doesn't suffer electrolyte stratification and tolerates extremely slow discharges (24-48 hours at low current). **AGM** is fine for small light scooters but ages faster under heavy clinical use. ### Frequently asked questions ### **Which MK fits my power wheelchair?** The model specified by the chair manufacturer. For Permobil, Invacare, Sunrise Medical, Quickie or similar, it's usually 8G22NF, 8G24, 8G27 or 8G31 by size. Tell us the chair model in the finder and we show the compatible battery. ### **How long does an MK Battery last?** 2-4 years in heavy daily use (5-10 km/day), 4-6 years in moderate use. Charger discipline is critical: use the original charger or one with a proper GEL profile. ### **Can I use a regular AGM in my chair?** It will work but last half as long, and the chair tolerates deep discharge worse. We always recommend GEL for clinical mobility. ### **Can I fly with MK GEL?** Yes. GEL is approved for air transport (no spillage, no liquid acid). One of the reasons it's the mobility standard. ### **Is MK Battery a good brand?** It's the worldwide reference in mobility GEL, recommended by Permobil, Invacare, Sunrise Medical and Pride Mobility. Quality is unquestioned. ### **8G24 vs 8G27 for my chair?** 8G24 (73Ah) is the most common footprint. 8G27 (86Ah) gives +18% autonomy if your chair accepts the slightly larger BCI 27 case. Check the battery shell before upgrading. ### **How long does shipping take?** Standard delivery **1 to 5 working days** to your country. We process orders within 24h. MK Battery catalogue curated by our technical team. **10,881 Trustpilot reviews · 4.4/5**. 24h mainland delivery, free 14-day returns. ## Products in this category | Product | Brand | Price | |---|---|---| | [Deep-cycle battery MK Powered ES12-12 12V 11Ah AGM](https://baterias.com/gb/battery-mk-es12-12-agm-12v-12ah) | MK POWERED | 54,41 € | | [Deep-cycle battery MK Powered ES22-12 12V 22Ah AGM](https://baterias.com/gb/battery-mk-es22-12-agm-12v-22ah) | MK POWERED | 53,46 € | | [Deep-cycle battery MK Powered ES20-12C FT 12V 20Ah AGM](https://baterias.com/gb/battery-mk-es20-12cft-agm-12v-20ah) | MK POWERED | 53,00 € | | [Deep-cycle battery MK Powered MU-1 SLD M 12V 35Ah AGM](https://baterias.com/gb/battery-mk-mu-1-sld-m-12v-35ah) | MK POWERED | 82,00 € | | [Deep-cycle battery MK Powered M22NF SLD G 12V 51Ah GEL](https://baterias.com/gb/battery-mk-m22nf-sld-g-gel-12v-50ah) | MK POWERED | 197,10 € | | [Deep-cycle battery MK Powered ES14-12 12V 14Ah AGM](https://baterias.com/gb/battery-mk-es14-12-agm-12v-14ah) | MK POWERED | 76,31 € | | [Deep-cycle battery MK Powered M34 SLD G 12V 60Ah GEL](https://baterias.com/gb/battery-mk-m34-sld-g-gel-12v-60ah) | MK POWERED | 213,10 € | | [Deep-cycle battery MK Powered ES1.2-12 12V 1Ah AGM](https://baterias.com/gb/battery-mk-es12-12-agm-12v-1-2ah) | MK POWERED | 24,91 € | | [Deep-cycle battery MK Powered ES1.9-12 12V 2Ah AGM](https://baterias.com/gb/battery-mk-es19-12-agm-12v-2-3ah) | MK POWERED | 29,66 € | | [Deep-cycle battery MK Powered ES17-12 12V 17Ah AGM](https://baterias.com/gb/battery-mk-es17-12-agm-12v-18ah) | MK POWERED | 80,74 € | | [Deep-cycle battery MK Powered ES7-12 12V 6Ah AGM](https://baterias.com/gb/battery-mk-es7-12-agm-12v-7-2ah) | MK POWERED | 41,25 € | | [Deep-cycle battery MK Powered M50-12 SLD M 12V 50Ah AGM](https://baterias.com/gb/battery-mk-m50-12-sld-m-agm-12v-50ah) | MK POWERED | 154,20 € | | [Deep-cycle battery MK Powered ES2.9-12 12V 2Ah AGM](https://baterias.com/gb/battery-mk-es29-12-agm-12v-2-9ah) | MK POWERED | 40,76 € | | [Deep-cycle battery MK Powered 8G31DT 12V 90Ah GEL](https://baterias.com/gb/battery-mk-8g31dt-gel-12v-97ah) | MK POWERED | 425,19 € | | [Deep-cycle battery MK Powered ES4-6 6V 4Ah AGM](https://baterias.com/gb/battery-mk-es4-6-agm-6v-4-5ah) | MK POWERED | 22,75 € | ## 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 --- *baterias.com — Automotive batteries · 2026-07-29*