Mk powered M40-12 SLD G · Wheelchair battery 12V 40Ah 225A GEL
Wheelchair battery MK Powered M40-12 SLD G 12V 40Ah 225A GEL images
Specifications
| Brand | MK POWERED |
|---|---|
| Part number | M40-12 SLD G |
| Voltage (V) | 12 |
| Capacity (C20) | 40Ah (c20) |
| Capacity (C5) | 34Ah (c5) |
| Cold cranking amps (EN) | 225 |
| Technology | GEL |
| Length | 197.10 mm |
| Width | 168.10 mm |
MK Powered M40-12 SLD G 12V 40Ah 225A 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 wearhandles deep discharges without losing capacity
- Sealed AGM/GELno maintenance, no risk of spills
- Thousands of useful cyclesover its full lifetime
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Mobility battery MK Powered M40-12 SLD G Mk GEL 40Ah 225A 12V
Designed for power wheelchairs, mobility scooters and light electric vehicles, the MK Powered M40-12 SLD G from the Mk GEL range offers 40 Ah of deep-cycle capacity with GEL technology. It replaces the original battery without adaptation in power wheelchairs and mobility scooters with a 197 × 168 × 174 mm format: same 40 Ah capacity.
- Thousands of useful cycles over its lifetime.
- Standard replacement format for wheelchairs and scooters.
- GEL technology: gelled electrolyte, fully sealed and maintenance-free.
- Designed to be discharged and recharged daily without losing capacity.
What the MK Powered M40-12 SLD G is for
The MK Powered M40-12 SLD G 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 14.29 kg and C (INSERT) terminals.
Dimensions, polarity and mounting
The MK Powered M40-12 SLD G is made in the 197 × 168 × 174 mm format and weighs 14.29 kg. It uses C (INSERT) terminals, the system that anchors and connects it in the vehicle. For a direct replacement, the current battery tray must accept these dimensions and the same terminal layout; otherwise adapters will be needed or the hold-down will change.
Why choose MK Powered batteries
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. At baterias.com we work directly with the manufacturer or its official distributor: real stock, brand-new product and official warranty.
The MK Powered M40-12 SLD G: Mk GEL range and GEL technology
The M40-12 SLD G is part of the MK Powered Mk GEL range. Choosing the right reference within the series comes down to capacity, dimensions and terminals: technology and quality are common to the whole family.
GEL technology fixes the acid in a solid gel. That removes maintenance and leaks and gives very long cycle life, in exchange for slightly slower recharging and lower peak current than an AGM.
Care and maintenance
Recharge the wheelchair or scooter after each use and do not leave it discharged for days: lead sulphates and loses capacity. GEL batteries need lower charging voltages: always use a charger with a GEL mode so as not to damage the electrolyte.
Manufacturer's warranty
The MK Powered M40-12 SLD G 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.
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.
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ReferenceBCOM-MK-M40-12 SLD G
Data sheet
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BrandMK
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ReferenceM40-12 SLD G
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ModelMK GEL
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Voltage (V)12
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Length197.10 mm
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Width168.10 mm
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Height174.80 mm
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Weight14.29 Kgs
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TechnologyGEL
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Terminal typeC (INSERT)
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Cold cranking amps (EN)225
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Capacity (C20)40Ah (c20)
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Capacity (C5)34Ah (c5)
Specific References
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EAN133660766462596
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MPNM40-12 SLD G
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Codes and references MK Powered M40-12 SLD G
| Brand | MK Powered |
|---|---|
| Manufacturer range | MK GEL |
| Manufacturer part number (MPN) | M40-12 SLD G |
| Also known as | M4012SLDG · M40 12 SLD G |
| EAN-13 barcode | 3660766462596 |
| Dimensions (length × width × height) | 197 × 168 × 175 mm (197x168x175) |
Recommended accessories
Compatible vehicles
The Mk Powered M40-12 SLD G fits 28 vehicles. Most searched below:
Frequently asked questions
Is the M40-12 SLD G model a gel battery? Where is it used?
Yes, this model is a GEL battery: sealed lead-acid where the electrolyte is in gel form. It tolerates deep discharges very well and is ideal for cyclic use (solar, motorhomes, electric wheelchairs, motorcycles). Requires a GEL-specific smart charger — max charge voltage ~14.1 V (vs 14.4-14.7 V for AGM). Lifespan 6-10 years.
How do I fit the M40-12 SLD G 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 our blog. 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 long does the MK Powered M40-12 SLD G battery last?
Expected lifespan of the MK Powered M40-12 SLD G is 6 to 10 years in cyclic use (marine, caravan, solar) with controlled discharges. 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 size is this battery?
Dimensions (length × width × height) are 197×168×175 mm — also written as 197x168x175 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 M40-12 SLD G?
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.
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