Mk powered 8G8D · Wheelchair battery 12V 225Ah 1150A GEL
Specifications
| Brand | MK POWERED |
|---|---|
| Part number | 8G8D |
| Voltage (V) | 12 |
| Capacity (C20) | 225Ah (c20) |
| Capacity (C5) | 188Ah (c5) |
| Technology | GEL |
| Length | 519.20 mm |
| Width | 278.60 mm |
| Height | 253.50 mm |
€940.60
VAT included
4,57/5★★★★★9 reviewsVerified purchases
- ★★★★★Juan Manuel Duran:
Os animo a llamar si necesitais asesoriamiento, a mi me funcionó
- ★★★★Rodrigo Ramos:
Ya me había encantado que me ayudaran con la elección de la MK 8G8D, pero es que encima me asesoraron al momento de instalarla. Todo de 10
- ★★★★★Gabriel Soto:
Pedí la batería en Viernes y el Lunes ya la tenía aquí
MK Powered 8G8D 12V 225Ah 1150A 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
225 Ah
Cold cranking
1150 A
Dimensions
519×278×253 mm
Technology
GEL
Weight
71,21 kg
Model
MK GEL
Mobility battery MK Powered 8G8D Mk GEL 225Ah 1,150A 12V
12VVoltage
225AhCapacity
1,150ACold cranking
71.21kgWeight
Designed for power wheelchairs, mobility scooters and light electric vehicles, the MK Powered 8G8D from the Mk GEL range offers 225 Ah of deep-cycle capacity with GEL technology. Its 519 × 278 × 253 mm make it the exact replacement for the 225 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.
- GEL: excellent resistance to deep discharge and long cycle life.
What the MK Powered 8G8D is for
The MK Powered 8G8D 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 71.21 kg and EAPT terminals.
The MK Powered 8G8D: Mk GEL range and GEL technology
Within the MK Powered catalogue, the Mk GEL series groups the references designed for this use. The 8G8D is the 225 Ah model of that family, with the same performance as its siblings in other sizes.
In a GEL battery the electrolyte is gelled with silica: it is fully sealed, cannot spill and tolerates deep discharge very well. It is the preferred technology in electric mobility, marine service and heavy-cycling applications.
Dimensions, polarity and mounting
The MK Powered 8G8D is made in the 519 × 278 × 253 mm format and weighs 71.21 kg. It uses EAPT terminals, the system that anchors and connects it in the vehicle. Checking the three dimensions and the terminal position before buying avoids the most common mistake when replacing a 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. All the MK Powered batteries in our catalogue are genuine product, recently manufactured and covered by the manufacturer's warranty.
Usage and maintenance tips
GEL batteries need lower charging voltages: always use a charger with a GEL mode so as not to damage the electrolyte. Recharge the wheelchair or scooter after each use and do not leave it discharged for days: lead sulphates and loses capacity.
Manufacturer's warranty
The MK Powered 8G8D 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.
Delivery times and returns
Order before 6:00 pm with stock available and it leaves today: mainland Spain and Portugal receive it in 24-48 working hours, the islands and the rest of the EU in 3 to 5 days. You have 14 days to return it if it has not been installed, with free collection on the mainland, and shipment tracking by email.
BCOM-MK-8G8D
Data sheet
- Brand
- MK
- Reference
- 8G8D
- Model
- MK GEL
- Voltage (V)
- 12
- Length
- 519.20 mm
- Width
- 278.60 mm
- Height
- 253.50 mm
- Weight
- 71.21 Kgs
- Technology
- GEL
- Terminal type
- EAPT
- Cold cranking amps (EN)
- 1150
- Capacity (C20)
- 225Ah (c20)
- Capacity (C5)
- 188Ah (c5)
Specific References
- MPN
- 8G8D
4,57/5
Verified purchasesLatest verified reviews
★★★★★Juan Manuel Duran
21/07/2026Buen asesoramiento
Os animo a llamar si necesitais asesoriamiento, a mi me funcionó
★★★★★Rodrigo Ramos
09/02/2026Excelente guía
Ya me había encantado que me ayudaran con la elección de la MK 8G8D, pero es que encima me asesoraron al momento de instalarla. Todo de 10
★★★★★Gabriel Soto
02/01/2026Buena atención y entrega rápida
Pedí la batería en Viernes y el Lunes ya la tenía aquí
★★★★★Alvaro Reyes
28/12/2025Buen servicio
Gracias a vosotros pude instalar la batería en mi coche
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 8G8D 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 is the MK Powered 8G8D 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.
How many years does this battery last?
Expected lifespan of the MK Powered 8G8D 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 519×279×254 mm — also written as 519x279x254 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.
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