# MK Battery M55-12 SLD M · Electric wheelchair battery 12V 55Ah ![MK Battery M55-12 SLD M · Electric wheelchair battery 12V 55Ah](https://bateriasonline.es/3601-home_default/mk-battery-m55-12-sld-m.jpg) > MK Battery M55-12 SLD M: 55 Ah electric wheelchair battery, 226×135×214 mm, AGM. Equivalent to Long WP55-12N and Long WP55-12NE. **Category:** [Electric wheelchair batteries](https://bateriasonline.es/en/electric-wheelchair-batteries) → [MK Battery](https://bateriasonline.es/en/mk-batteries) - **Canonical URL**: https://bateriasonline.es/en/mk-battery-m55-12-sld-m - **Language**: en - **Brand**: MK Battery - **Reference**: BOL-MK-M55-12 SLD M - **MPN**: M55-12 SLD M - **Price**: 195,12 € (VAT incl., Spain) - **Last updated**: 2026-10-27 ## Technical specifications | Feature | Value | |---|---| | Brand | MK Battery | | Range | MK AGM | | Application | Electric wheelchairs | | Technology | AGM | | Voltage | 12 V | | Capacity | 55 Ah | | Length | 226 mm | | Width | 135 mm | | Height | 214 mm | | Weight | 17 kg | | Terminal type | M6 | ## Quick description MK Battery M55-12 SLD M: electric wheelchair battery with 12 V and 55 Ah, measuring 226 × 135 × 214 mm. ## Description ## Where the MK Battery M55-12 SLD M fits The MK Battery M55-12 SLD M is made for powered wheelchairs. It is fitted as a 12 V pair and takes hundreds of daily cycles, something a starter battery could not handle. The M55-12 SLD M belongs to the MK Battery MK AGM range. [See all MK Battery batteries](https://bateriasonline.es/en/mk-batteries) ## Equivalents and alternatives to the MK Battery M55-12 SLD M Other AGM batteries that fit the M55-12 SLD M's tray with the same polarity: an AGM can only be replaced by another AGM. | Model | Technology | Capacity | Dimensions (mm) | |---|---|---|---| | Long WP55-12N | AGM | 55 Ah | 226 × 135 × 214 | | Long WP55-12NE | AGM | 55 Ah | 226 × 135 × 214 | | Kronobat ES55-12 | AGM | 55 Ah | 226 × 135 × 214 | | Fullriver HC55 | AGM | 55 Ah | 229 × 138 × 212 | | Q-Battery 12LCP-56 | AGM | 56 Ah | 229 × 138 × 210 | ## MK Battery M55-12 SLD M vs M62-12 SLD M and M22NF-HC: differences What sets the M55-12 SLD M apart from its neighbours in the MK Battery range: | Model | Capacity | Dimensions (mm) | Weight | |---|---|---|---| | MK Battery M55-12 SLD M (this one) | 55 Ah | 226 × 135 × 214 | 17 kg | | MK Battery M62-12 SLD M | 65 Ah | 226 × 135 × 214 | 18.7 kg | | MK Battery M22NF-HC | 48.4 Ah | 228.3 × 138.9 × 210.1 | 18.14 kg | - MK Battery M62-12 SLD M: 10 Ah more, the same dimensions. - MK Battery M22NF-HC: 6.60 Ah less, a different case (228.3 × 138.9 × 210.1 mm). ## AGM technology in the M55-12 SLD M Inside, the M55-12 SLD M has glass fibre separators (AGM) that hold the electrolyte. It is fitted in cars with advanced Start-Stop and in deep-cycle equipment. ## Check this before ordering the MK Battery M55-12 SLD M - Length, width and height of the M55-12 SLD M: 226 × 135 × 214 mm. - With 55 Ah, the M55-12 SLD M replaces an original battery of that capacity or slightly less. ## Part numbers and codes for the MK Battery M55-12 SLD M Shops, garages and catalogues identify the M55-12 SLD M with these codes: | Commercial reference | M55-12 SLD M | |---|---| | Terminal type | M6 | | Not to be confused with | MK Battery M45-12 SLD M (45 Ah), MK Battery M50-12 SLD M (50 Ah), MK Battery M75-12 SLD M (75 Ah) | ## Frequently asked questions about the MK Battery M55-12 SLD M ### M55-12 SLD M or M62-12 SLD M: which one suits me? Compared with the M55-12 SLD M, the MK Battery M62-12 SLD M has 10 Ah more. With 65 Ah, the M62-12 SLD M runs longer between charges than the M55-12 SLD M (55 Ah). Both measure 226 × 135 × 214 mm, so they fit the same tray. ### How much does the MK Battery M55-12 SLD M weigh? 17 kg, with 55 Ah of capacity. For reference, the MK Battery M62-12 SLD M (65 Ah) weighs 18.7 kg. ### Which battery is equivalent to the MK Battery M55-12 SLD M? Only other AGM batteries with its dimensions and polarity: Long WP55-12N, Long WP55-12NE and Kronobat ES55-12. Neither an EFB nor a conventional battery replaces the M55-12 SLD M. ### How much range does the MK Battery M55-12 SLD M give in an electric wheelchair? It depends on weight, terrain and the chair. As a guide, with 55 Ah per battery an average chair covers several kilometres a day; range drops with hills and cold batteries. ## Keep comparing: alternatives to the M55-12 SLD M - [Other electric wheelchair batteries](https://bateriasonline.es/en/electric-wheelchair-batteries) - [Full MK Battery catalogue](https://bateriasonline.es/en/mk-batteries) - [Long WP55-12N](https://bateriasonline.es/en/long-wp55-12n) · 55 Ah, 226×135×214 mm - [Long WP55-12NE](https://bateriasonline.es/en/long-wp55-12ne) · 55 Ah, 226×135×214 mm --- *bateriasonline.es — Batteries and accessories · 2026-11-11*