# Wheelchair battery MK Powered ES40-12 12V 45Ah AGM ![Wheelchair battery MK Powered ES40-12 12V 45Ah AGM](https://baterias.com/248-home_default/battery-mk-es40-12-12v-45ah.jpg) > MK Powered ES40-12 wheelchair battery 12V 45Ah AGM. Dimensions 198Γ—166Γ—170 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-es40-12-12v-45ah - **Language**: en-GB - **Brand**: MK POWERED - **Reference**: BCOM-MK-ES40-12 - **MPN**: ES40-12 - **Stock**: Out of stock ## Technical specifications | Feature | Value | |---|---| | Brand | MK | | Reference | ES40-12 | | Model | MK AGM | | Voltage (V) | 12 V | | Largo | 198.1 mm | | Ancho | 166.1 mm | | Alto | 170.9 mm | | Peso | 14.47 kg | | TecnologΓ­a | AGM | | Capacity (C20) | 45 Ah (c20) | | Capacity (C10) | 42.75 Ah (c10) | | Capacity (C5) | 38.25 Ah (c5) | ## Quick description **MK Powered ES40-12 12V 45Ah** 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 45 Ah C20 πŸ“ Dimensions 198Γ—166Γ—170 mm βš™οΈ Technology AGM βš–οΈ Weight 14,47 kg 🏷️ Model MK AGM ## Description ## Mobility battery MK Powered ES40-12 Mk AGM 45Ah 12V 12*V* Voltage 45*Ah* Capacity 14.47*kg* Weight Designed for power wheelchairs, mobility scooters and light electric vehicles, the **MK Powered ES40-12** from the **Mk AGM** range offers **45 Ah** of deep-cycle capacity with AGM technology. It measures 198 Γ— 166 Γ— 170 mm, the format sought by anyone replacing a 45 Ah battery in power wheelchairs and mobility scooters. - Designed to be discharged and recharged daily without losing capacity. - AGM technology: absorbed electrolyte, no spills, can be mounted at an angle. - Standard replacement format for wheelchairs and scooters. - Thousands of useful cycles over its lifetime. ### What the MK Powered ES40-12 is for With 45 Ah, the MK Powered ES40-12 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 14.47 kg. ### Will it fit your current battery tray? It has external dimensions of 198 Γ— 166 Γ— 170 mm and weighs 14.47 kg. Checking the three dimensions and the terminal position before buying avoids the most common mistake when replacing a battery. ### 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. At baterias.com we work directly with the manufacturer or its official distributor: real stock, brand-new product and official warranty. ### The MK Powered ES40-12: Mk AGM range and AGM technology The **Mk AGM** is the MK Powered range the ES40-12 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. ### Usage and maintenance tips Use the original charger or one compatible with the battery technology (AGM/GEL) and always replace both batteries in the set together. Charge with a charger that has an AGM mode: it limits the voltage and protects the glass-fibre separators. ### Official warranty The MK Powered ES40-12 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. ### Shipping, delivery 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 ES40-12 an AGM battery and what are the benefits of AGM? Yes. The ES40-12 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 is the MK Powered ES40-12 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 (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 many years does this battery last? Expected lifespan of the MK Powered ES40-12 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 ES40-12 model? Dimensions (length Γ— width Γ— height) are 198Γ—166Γ—171 mm β€” also written as 198x166x171 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 ES40-12? 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**: 4.75 / 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· 2026-09-28*