Mk powered M17-12 SLD M · Wheelchair battery 12V 18Ah AGM
Specifications
| Brand | MK POWERED |
|---|---|
| Part number | M17-12 SLD M |
| Voltage (V) | 12 |
| Capacity (C20) | 18Ah (c20) |
| Capacity (C5) | 15.3Ah (c5) |
| Technology | AGM |
| Length | 181.10 mm |
| Width | 75.90 mm |
| Height | 166.90 mm |
This product is priced on demand to offer you the best available price at all times.
Please contact us to request a quote and we will inform you about availability and the best price on the entire website, as well as the delivery time.
Thank you
4,72/5★★★★★47 reviewsVerified purchases
- ★★★★★Vicente Garcia:
No sé de baterías pero llamé y me indicarón la que me mi coche necesitaba
- ★★★★Juan Jose Martin:
Uff te saca de un buen apuro, tu pedido llega en menos de 24 horas comprobado
- ★★★★Juan Ortega:
Tenía dudas de que batería elegir y me indicarón la mejor opción además se ofrecieron a asesorarme con la instalación. Increíble y super…
MK Powered M17-12 SLD M 12V 18Ah 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 wearhandles deep discharges without losing capacity
- Sealed AGM/GELno maintenance, no risk of spills
- Thousands of useful cyclesover its full lifetime
Voltage
12 V
Capacity
18 Ah
Dimensions
181×75×166 mm
Technology
AGM
Weight
5,85 kg
Model
MK AGM
Free quote, no obligation
Request a quote for your Wheelchair battery MK Powered M17-12 SLD M 12V 18Ah AGM
- Reply in under 24 working hours
- Best price guaranteed
Mobility battery MK Powered M17-12 SLD M Mk AGM 18Ah 12V
12VVoltage
18AhCapacity
5.85kgWeight
The 12 V, 18 Ah MK Powered M17-12 SLD M from the Mk AGM range with AGM technology is the standard replacement for power wheelchairs, mobility scooters and light electric vehicles. Measuring 181 × 75 × 166 mm, it is the direct replacement for power wheelchairs and mobility scooters fitted from the factory with a 18 Ah battery of this format.
- AGM: faster recharging and better cycle resistance than a conventional battery.
- Sealed AGM/GEL: safe indoors and in transport.
- No maintenance, no water top-ups.
- Approved for air and sea transport (VRLA).
What the MK Powered M17-12 SLD M is for
The MK Powered M17-12 SLD M is designed for power wheelchairs, mobility scooters and light electric vehicles. Wheelchairs and scooters normally use two identical batteries in series: replace them together. Check that it matches your current battery in dimensions, terminals and hold-down: this reference has a weight of 5.85 kg.
Dimensions, polarity and mounting
It has external dimensions of 181 × 75 × 166 mm and weighs 5.85 kg. Checking the three dimensions and the terminal position before buying avoids the most common mistake when replacing a battery.
What MK Powered does differently
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. We guarantee that every MK Powered arrives new, charged and with the manufacturer's full warranty.
The MK Powered M17-12 SLD M: Mk AGM range and AGM technology
The Mk AGM is the MK Powered range the M17-12 SLD M 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.
Care and maintenance
Charge with a charger that has an AGM mode: it limits the voltage and protects the glass-fibre separators. Recharge the wheelchair or scooter after each use and do not leave it discharged for days: lead sulphates and loses capacity.
Warranty and coverage
The MK Powered M17-12 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.
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.
BCOM-MK-M17-12 SLD M
Data sheet
- Brand
- MK
- Reference
- M17-12 SLD M
- Model
- MK AGM
- Voltage (V)
- 12
- Length
- 181.10 mm
- Width
- 75.90 mm
- Height
- 166.90 mm
- Weight
- 5.85 Kgs
- Technology
- AGM
- Capacity (C20)
- 18Ah (c20)
- Capacity (C5)
- 15.3Ah (c5)
Specific References
- MPN
- M17-12 SLD M
4,72/5
Verified purchasesLatest verified reviews
★★★★★Vicente Garcia
14/02/2026Encontré lo que buscaba
No sé de baterías pero llamé y me indicarón la que me mi coche necesitaba
★★★★★Juan Jose Martin
25/01/2026Recibí al día siguiente
Uff te saca de un buen apuro, tu pedido llega en menos de 24 horas comprobado
★★★★★Juan Ortega
21/01/2026Pude instalarla gracias a su asesoramiento
Tenía dudas de que batería elegir y me indicarón la mejor opción además se ofrecieron a asesorarme con la instalación. Increíble y super recomendada
Recommended accessories
How to change the battery
Guide to replace a cyclic battery (12V 4-30Ah) for UPS, mobility scooter, alarm or backup device. Estimated time 10-15 minutes. Important: discharge residual voltage before handling.
Step 1. Power off and unplug the device
Unplug the device (UPS, scooter, alarm) and leave it off for at least 30 seconds to discharge residual capacitor voltage. Work on an insulating surface.
Step 2. Locate the battery compartment
Usually under the seat (mobility scooter/wheelchair), in the rear module of the UPS, or behind a side panel with screws. Check the device manual for unusual models.
Step 3. Disconnect the negative (−) first
With insulated gloves, remove the negative (−) cable first. Some UPS have protection fuses — note their position before removing.
Step 4. Disconnect the positive (+) terminal
Repeat with the positive cable (red, marked +). Important: never let a terminal touch metal of the car while the other is still connected.
Step 5. Remove the old battery
Typical weight 1-15 kg depending on capacity. Many cyclic batteries are AGM/GEL — keep them upright. Do NOT invert the battery: even sealed, residue may exist.
Step 6. Fit the new battery
Same orientation and type (AGM, GEL or flooded). Polarity must match the device, not a chassis (this is not a car). Make sure terminals do not touch metal parts of the compartment.
Step 7. Connect the positive (+) first
On cyclic devices the order is reversed compared to cars: positive (+) first, negative (−) afterwards. Tighten without forcing — the plastic terminal housing of cyclic batteries damages easily.
Step 8. Initial charge before first use
Cyclic batteries ship at 60-80%. Before first use, connect the device charger for 8-12 hours (or use an AGM/GEL smart charger if available). This avoids short cycles and extends lifespan.
Frequently asked questions
Is the MK Powered M17-12 SLD M an AGM battery and what are the benefits of AGM?
Yes. The M17-12 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.
How is the MK Powered M17-12 SLD M 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 (−) 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 M17-12 SLD M model?
Expected lifespan of the MK Powered M17-12 SLD M 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 dimensions of the MK Powered M17-12 SLD M battery?
Dimensions (length × width × height) are 181×76×167 mm — also written as 181x76x167 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 interchangeable batteries are there for this one?
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.
The top-rated online battery store in Spain
-
Audited by Trustpilot, no filters, no edits. The top-rated battery store in Spain.
Trustpilot · verified, no filters
-
Official Varta distributor
Official Varta wholesale distributor. 100% genuine batteries, recently manufactured, best price and no middlemen.
World’s best-selling battery brand
-
+100,000 satisfied customers
More than 100,000 customers already trust baterias.com — and recommend us to their friends and family.
They trust us and recommend us
Choose trust, choose quality, choose baterias.com.