Mk powered 8A24 HEI · Wheelchair battery 12V 79Ah AGM
Specifications
| Brand | MK POWERED |
|---|---|
| Part number | 8A24 HEI |
| Voltage (V) | 12 |
| Capacity (C20) | 79Ah (c20) |
| Capacity (C5) | 69.2Ah (c5) |
| Technology | AGM |
| Length | 276.90 mm |
| Width | 166.60 mm |
| Height | 210.10 mm |
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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
4,74/5★★★★★53 reviewsVerified purchases
- ★★★★★Mariano Navarro:
Gracias por el asesoramiento
- ★★★★Vicente Delgado:
Agradezco que me asesoraran de cómo instalar la batería que compré
- ★★★★Ivan Moya:
Me alegra que cumplen con los tiempos de envío
MK Powered 8A24 HEI 12V 79Ah 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
79 Ah
Dimensions
276×166×210 mm
Technology
AGM
Weight
24,04 kg
Model
MK AGM
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Mobility battery MK Powered 8A24 HEI Mk AGM 79Ah 12V
12VVoltage
79AhCapacity
24.04kgWeight
Designed for power wheelchairs, mobility scooters and light electric vehicles, the MK Powered 8A24 HEI from the Mk AGM range offers 79 Ah of deep-cycle capacity with AGM technology. It measures 276 × 166 × 210 mm, the format sought by anyone replacing a 79 Ah battery in power wheelchairs and mobility scooters.
- Designed to be discharged and recharged daily without losing capacity.
- AGM technology: absorbed electrolyte, no spills, can be mounted at an angle.
- Standard replacement format for wheelchairs and scooters.
- Thousands of useful cycles over its lifetime.
Will it fit your current battery tray?
It has external dimensions of 276 × 166 × 210 mm and weighs 24.04 kg. 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.
What the MK Powered 8A24 HEI is for
The MK Powered 8A24 HEI 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 24.04 kg.
The MK Powered 8A24 HEI: Mk AGM range and AGM technology
Within the MK Powered catalogue, the Mk AGM series groups the references designed for this use. The 8A24 HEI is the 79 Ah model of that family, with the same performance as its siblings in other sizes.
AGM means the acid is held in a glass mat instead of floating free. That is why the battery can be installed in the cabin without gases, survives more cycles and recovers its charge quickly.
MK Powered: the maker behind the 8A24 HEI
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 8A24 HEI 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.
How to make it last longer
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.
Shipping, delivery and returns
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-8A24 HEI
Data sheet
- Brand
- MK
- Reference
- 8A24 HEI
- Model
- MK AGM
- Voltage (V)
- 12
- Length
- 276.90 mm
- Width
- 166.60 mm
- Height
- 210.10 mm
- Weight
- 24.04 Kgs
- Technology
- AGM
- Capacity (C20)
- 79Ah (c20)
- Capacity (C5)
- 69.2Ah (c5)
Specific References
- MPN
- 8A24 HEI
4,74/5
Verified purchasesLatest verified reviews
★★★★★Mariano Navarro
02/07/2026Me asesoraron en la batería
Gracias por el asesoramiento
★★★★★Vicente Delgado
08/02/2026Gran asesoría
Agradezco que me asesoraran de cómo instalar la batería que compré
★★★★★Ivan Moya
14/01/2026Me sacarón de un apuro, entrega en menos de 24 horas
Me alegra que cumplen con los tiempos de envío
★★★★★Mateo Campos
11/01/2026Recomendado
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 MK Powered 8A24 HEI an AGM battery and what are the benefits of AGM?
Yes. The 8A24 HEI 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 do I fit the 8A24 HEI 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 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 8A24 HEI model?
Expected lifespan of the MK Powered 8A24 HEI 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 8A24 HEI battery?
Dimensions (length × width × height) are 277×167×210 mm — also written as 277x167x210 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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