# Wheelchair battery MK Powered M40-12 SLD M 12V 45Ah AGM ![Wheelchair battery MK Powered M40-12 SLD M 12V 45Ah AGM](https://baterias.com/287-home_default/battery-mk-m40-12-sld-m-agm-12v-45ah.jpg) > MK Powered M40-12 SLD M wheelchair battery 12V 45Ah AGM. Dimensions 198×166×170 mm. Deep-cycle and sealed, for daily wheelchair and mobility scooter use. **Category:** [Power Wheelchair Batteries](https://baterias.com/gb/batteries-for-electric-wheelchairs) → [MK POWERED](https://baterias.com/gb/mk-powered) - **Canonical URL**: https://baterias.com/gb/battery-mk-m40-12-sld-m-agm-12v-45ah - **Language**: en-GB - **Brand**: MK POWERED - **Reference**: BCOM-MK-M40-12 SLD M - **EAN**: 8404653009069 - **MPN**: M40-12 SLD M - **Price**: 126,90 € (VAT incl., Spain) - **Last updated**: 2026-10-28 - **Stock**: In stock ## Technical specifications | Feature | Value | |---|---| | Brand | MK | | Reference | M40-12 SLD M | | Model | MK AGM | | Voltage (V) | 12 V | | Largo | 198.1 mm | | Ancho | 166.1 mm | | Alto | 170.9 mm | | Peso | 14.47 kg | | Tecnología | AGM | | Capacity (C20) | 45 Ah (c20) | | Capacity (C5) | 38.25 Ah (c5) | ## Quick description **MK Powered M40-12 SLD M 12V 45Ah** 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 45 Ah C20 📏 Dimensions 198×166×170 mm ⚙️ Technology AGM ⚖️ Weight 14,47 kg 🏷️ Model MK AGM ## Description ## Mobility battery MK Powered M40-12 SLD M Mk AGM 45Ah 12V 12*V* Voltage 45*Ah* Capacity 14.47*kg* Weight The **12 V**, **45 Ah** **MK Powered M40-12 SLD M** from the **Mk AGM** range with AGM technology is the standard replacement for power wheelchairs, mobility scooters and light electric vehicles. Its 198 × 166 × 170 mm make it the exact replacement for the 45 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 M40-12 SLD M is for With 45 Ah, the MK Powered M40-12 SLD M 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? In terms of format, the MK Powered M40-12 SLD M measures 198 × 166 × 170 mm (length × width × height) and weighs 14.47 kg. 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 M40-12 SLD M: Mk AGM range and AGM technology Within the MK Powered catalogue, the **Mk AGM** series groups the references designed for this use. The M40-12 SLD M is the 45 Ah model of that family, with the same performance as its siblings in other sizes. 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. ### MK Powered: the maker behind the M40-12 SLD M 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. All the MK Powered batteries in our catalogue are genuine product, recently manufactured and covered by the manufacturer's warranty. ### Official warranty The MK Powered M40-12 SLD M 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. Recharge the wheelchair or scooter after each use and do not leave it discharged for days: lead sulphates and loses capacity. ### When you get it and how to return it Same-day dispatch from our warehouse for in-stock orders placed **before 6:00 pm**: 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 **14 days** if the battery has not been used (free collection on the Iberian mainland). You will receive tracking by email. ## Frequently asked questions ### Is the M40-12 SLD M model AGM? What does this technology offer? Yes. The M40-12 SLD M 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. ### What are the measurements of the M40-12 SLD M model? Dimensions (length × width × height) are 198×166×171 mm — also written as 198x166x171 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. ### MK Powered M40-12 SLD M or MK Powered M50-12 SLD M: which one to choose? Same case and same technology as the M40-12 SLD M: an alternative by size, not an official equivalent. Compared with the M40-12 SLD M it has 5 Ah more. It costs €28.00 more. If the polarity matches and your equipment had a similar capacity, it works as a replacement; if in doubt, ask us with your model. ### MK Powered M40-12 SLD M or MK Powered M45-12 SLD M: which one to choose? Same case and same technology as the M40-12 SLD M: an alternative by size, not an official equivalent. Compared with the M40-12 SLD M it has the same Ah and cranking power. It costs €22.60 more. If the polarity matches and your equipment had a similar capacity, it works as a replacement; if in doubt, ask us with your model. ## Technical team (editorial authorship) The FAQs, guides and comparisons on this site are reviewed by the baterias.com technical team — automotive battery specialists since 2012. → https://baterias.com/gb/technical-team --- *baterias.com — Automotive batteries · 2026-11-02*