# Wheelchair battery MK Powered ES3.8-6 6V 3.8Ah AGM ![Wheelchair battery MK Powered ES3.8-6 6V 3.8Ah AGM](https://baterias.com/243-home_default/battery-mk-es38-6-agm-6v-3-8ah.jpg) > MK Powered ES3.8-6 wheelchair battery 6V 3.8Ah AGM. Dimensions 66×33×126 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-es38-6-agm-6v-3-8ah - **Language**: en-GB - **Brand**: MK POWERED - **Reference**: BCOM-MK-ES3.8-6 - **MPN**: ES3.8-6 - **Price**: 30,95 € - **Stock**: Out of stock ## Technical specifications | Feature | Value | |---|---| | Brand | MK | | Reference | ES3.8-6 | | Model | MK AGM | | Voltage (V) | 6 V | | Largo | 66 mm | | Ancho | 33 mm | | Alto | 126 mm | | Peso | 0.73 kg | | Tecnología | AGM | | Terminal type | F1 | | Capacity (C20) | 3.8 Ah (c20) | | Capacity (C5) | 3.23 Ah (c5) | ## Quick description **MK Powered ES3.8-6 6V 3Ah** 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 6 V ⚡ Capacity 3 Ah C20 📏 Dimensions 66×33×126 mm ⚙️ Technology AGM ⚖️ Weight 0,74 kg 🏷️ Model MK AGM ## Description ## Mobility battery MK Powered ES3.8-6 Mk AGM 3.8Ah 6V 6*V* Voltage 3.8*Ah* Capacity 0.73*kg* Weight The **6 V**, **3.8 Ah** **MK Powered ES3.8-6** from the **Mk AGM** range with AGM technology is the standard replacement for power wheelchairs, mobility scooters and light electric vehicles. Its 66 × 33 × 126 mm make it the exact replacement for the 3.8 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 ES3.8-6 is for With 3.8 Ah, the MK Powered ES3.8-6 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 0.73 kg and F1 terminals. ### Size, terminals and hold-down of the MK Powered ES3.8-6 It has external dimensions of 66 × 33 × 126 mm and weighs 0.73 kg. It uses F1 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. ### The MK Powered ES3.8-6: Mk AGM range and AGM technology The **Mk AGM** is the MK Powered range the ES3.8-6 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. In an AGM battery the electrolyte is absorbed in glass-fibre separators: there is no free liquid, it cannot spill and it can be mounted at an angle. That construction lowers internal resistance, speeds up recharging and multiplies cycle life compared with a conventional 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. ### Manufacturer's warranty The MK Powered ES3.8-6 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. ### 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. ### Delivery times 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 ES3.8-6 an AGM battery and what are the benefits of AGM? Yes. The ES3.8-6 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 change this battery step by step? 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. ### What is the service life of the ES3.8-6 model? Expected lifespan of the MK Powered ES3.8-6 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 ES3.8-6 model? Dimensions (length × width × height) are 66×33×126 mm — also written as 66x33x126 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 batteries are equivalent to the MK Powered ES3.8-6? 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**: 4.57 / 5 (11 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 · 2026-09-29*