# Wheelchair battery MK Powered ES9-12 12V 9Ah AGM ![Wheelchair battery MK Powered ES9-12 12V 9Ah AGM](https://baterias.com/266-home_default/battery-mk-es9-12-agm-12v-9ah.jpg) > MK Powered ES9-12 wheelchair battery 12V 9Ah AGM. Dimensions 150×65×102 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-es9-12-agm-12v-9ah - **Language**: en-GB - **Brand**: MK POWERED - **Reference**: BCOM-MK-ES9-12 - **MPN**: ES9-12 - **Price**: 56,40 € - **Stock**: In stock ## Technical specifications | Feature | Value | |---|---| | Brand | MK | | Reference | ES9-12 | | Model | MK AGM | | Voltage (V) | 12 V | | Largo | 150.9 mm | | Ancho | 65 mm | | Alto | 102.1 mm | | Peso | 2.69 kg | | Tecnología | AGM | | Terminal type | F2 | | Capacity (C20) | 9 Ah (c20) | | Capacity (C5) | 7.65 Ah (c5) | ## Quick description **MK Powered ES9-12 12V 9Ah** 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 🔌 Voltage 12 V ⚡ Capacity 9 Ah C20 📏 Dimensions 150×65×102 mm ⚙️ Technology AGM ⚖️ Weight 2,69 kg 🏷️ Model MK AGM ## Description ## Mobility battery MK Powered ES9-12 Mk AGM 9Ah 12V 12*V* Voltage 9*Ah* Capacity 2.69*kg* Weight The **MK Powered ES9-12** with AGM technology delivers **9 Ah** at **12 V** with the cycle life that power wheelchairs, mobility scooters and light electric vehicles demand. Its 150 × 65 × 102 mm make it the exact replacement for the 9 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. - AGM: faster recharging and better cycle resistance than a conventional battery. ### What the MK Powered ES9-12 is for The MK Powered ES9-12 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 2.69 kg and F2 terminals. ### Size, terminals and hold-down of the MK Powered ES9-12 In terms of format, the MK Powered ES9-12 measures 150 × 65 × 102 mm (length × width × height) and weighs 2.69 kg. It uses F2 terminals, the system that anchors and connects it in the vehicle. Before replacing it, measure your current battery tray: if all three dimensions and the terminal positions match, the swap is direct and needs no adapters. ### MK Powered: the maker behind the ES9-12 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. We guarantee that every MK Powered arrives new, charged and with the manufacturer's full warranty. ### The MK Powered ES9-12: Mk AGM range and AGM technology The **Mk AGM** is the MK Powered range the ES9-12 belongs to: it shares the same construction and quality criteria with the rest of the series, and varies in capacity and format to suit each vehicle. AGM (Absorbent Glass Mat) technology seals the electrolyte in glass microfibre. The result is a maintenance-free battery that is highly vibration-resistant and able to withstand deep discharges that would ruin a classic lead-acid battery. ### How to make it last longer Charge with a charger that has an AGM mode: it limits the voltage and protects the glass-fibre separators. Use the original charger or one compatible with the battery technology (AGM/GEL) and always replace both batteries in the set together. ### Official warranty The MK Powered ES9-12 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 Same-day dispatch from our warehouse for in-stock orders placed **before [[ks:cutoff]]**: 24-48 working hours in mainland Spain and Portugal, 3 to 5 days in the islands and the rest of Europe. Returns are accepted for **[[ks:return_days]] days** if the battery has not been used (free collection on the Iberian mainland). You will receive tracking by email. ## Frequently asked questions ### Is this battery AGM? What is it for? Yes. The ES9-12 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 ES9-12 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 many years does this battery last? Expected lifespan of the MK Powered ES9-12 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 ES9-12 model? Dimensions (length × width × height) are 151×65×102 mm — also written as 151x65x102 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. ### What are the equivalents of the ES9-12 model? 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. ## Equivalent batteries - [MK POWERED ES7-12FR T2](https://baterias.com/gb/battery-mk-es7-12fr-t2-12v-72ah) - [KRONOBAT 12V9Ah](https://baterias.com/gb/battery-12v-9ah-agm) ## Reviews - **Average rating**: 4.86 / 5 (23 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 · 2026-10-06*