# Wheelchair battery MK Powered 8G31 12V 97.6Ah GEL ![Wheelchair battery MK Powered 8G31 12V 97.6Ah GEL](https://baterias.com/193-home_default/battery-mk-8g31-12v-976ah.jpg) > MK Powered 8G31 wheelchair battery 12V 97.6Ah GEL. Dimensions 328×171×237 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-8g31-12v-976ah - **Language**: en-GB - **Brand**: MK POWERED - **Reference**: BCOM-MK-8G31 - **MPN**: 8G31 - **Price**: 425,80 € - **Stock**: Out of stock ## Technical specifications | Feature | Value | |---|---| | Brand | MK | | Reference | 8G31 | | Model | MK GEL | | Voltage (V) | 12 V | | Largo | 328.4 mm | | Ancho | 171.2 mm | | Alto | 237 mm | | Peso | 31.07 kg | | Tecnología | GEL | | Capacity (C20) | 97.6 Ah (c20) | | Capacity (C10) | 90 Ah (c10) | | Capacity (C5) | 80.5 Ah (c5) | ## Quick description **MK Powered 8G31 12V 97Ah** 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 97 Ah C20 📏 Dimensions 328×171×237 mm ⚙️ Technology GEL ⚖️ Weight 31,07 kg 🏷️ Model MK GEL ## Description ## Mobility battery MK Powered 8G31 Mk GEL 97.6Ah 12V 12*V* Voltage 97.6*Ah* Capacity 31.07*kg* Weight The **MK Powered 8G31** with GEL technology delivers **97.6 Ah** at **12 V** with the cycle life that power wheelchairs, mobility scooters and light electric vehicles demand. Its 328 × 171 × 237 mm make it the exact replacement for the 97.6 Ah battery fitted as standard to many power wheelchairs and mobility scooters. - Sealed AGM/GEL: safe indoors and in transport. - GEL: excellent resistance to deep discharge and long cycle life. - Approved for air and sea transport (VRLA). - No maintenance, no water top-ups. ### Size, terminals and hold-down of the MK Powered 8G31 The MK Powered 8G31 is made in the 328 × 171 × 237 mm format and weighs 31.07 kg. Checking the three dimensions and the terminal position before buying avoids the most common mistake when replacing a battery. ### What the MK Powered 8G31 is for The MK Powered 8G31 is designed for power wheelchairs, mobility scooters and light electric vehicles. Wheelchairs and scooters normally use two identical batteries in series: replace them together. Check that it matches your current battery in dimensions, terminals and hold-down: this reference has a weight of 31.07 kg. ### The MK Powered 8G31: Mk GEL range and GEL technology The 8G31 is part of the MK Powered **Mk GEL** range. Choosing the right reference within the series comes down to capacity, dimensions and terminals: technology and quality are common to the whole family. A GEL battery is the choice when cycle resistance and safety matter most: no gases, no liquid and thousands of partial discharges in its lifetime. ### Why choose MK Powered batteries 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. All the MK Powered batteries in our catalogue are genuine product, recently manufactured and covered by the manufacturer's warranty. ### Manufacturer's warranty The MK Powered 8G31 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. ### Care and maintenance 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 [[ks:cutoff]]** with the battery in stock ship the same day. Delivery in mainland Spain and Portugal takes 24-48 working hours; for the Balearic and Canary Islands and the rest of the European Union allow 3 to 5 working days. You have **[[ks:return_days]] 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 8G31 a GEL battery? What is GEL used for? Yes, this model is a GEL battery: sealed lead-acid where the electrolyte is in gel form. It tolerates deep discharges very well and is ideal for cyclic use (solar, motorhomes, electric wheelchairs, motorcycles). Requires a GEL-specific smart charger — max charge voltage ~14.1 V (vs 14.4-14.7 V for AGM). Lifespan 6-10 years. ### How is the MK Powered 8G31 battery installed in the vehicle? 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 8G31 battery last? Expected lifespan of the MK Powered 8G31 is 6 to 10 years in cyclic use (marine, caravan, solar) with controlled discharges. 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 8G31 battery? Dimensions (length × width × height) are 328×171×237 mm — also written as 328x171x237 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 interchangeable batteries are there for this one? 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. ## Reviews - **Average rating**: 4.91 / 5 (10 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 --- *baterias.com — Automotive batteries · 2026-09-28*