Mk powered 8GU1 · Wheelchair battery 12V 31.6Ah GEL
Specifications
| Brand | MK POWERED |
|---|---|
| Part number | 8GU1 |
| Voltage (V) | 12 |
| Capacity (C20) | 31.6Ah (c20) |
| Capacity (C10) | 77Ah (c10) |
| Capacity (C5) | 26.8Ah (c5) |
| Technology | GEL |
| Length | 195.80 mm |
| Width | 131.60 mm |
€229.60
VAT included
4,82/5★★★★★28 reviewsVerified purchases
- ★★★★Gonzalo Santos:
Os animo a llamar si necesitais asesoriamiento, a mi me funcionó
- ★★★★★Roberto Castro:
Pedí la batería en Viernes y el Lunes ya la tenía aquí
- ★★★★★Cristian Leon:
Ya me había encantado que me ayudaran con la elección de la MK 8GU1, pero es que encima me asesoraron al momento de instalarla. Todo de 10
MK Powered 8GU1 12V 31Ah 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
31 Ah
Dimensions
195×131×183 mm
Technology
GEL
Weight
10,66 kg
Model
MK GEL
Mobility battery MK Powered 8GU1 Mk GEL 31.6Ah 12V
12VVoltage
31.6AhCapacity
10.66kgWeight
Designed for power wheelchairs, mobility scooters and light electric vehicles, the MK Powered 8GU1 from the Mk GEL range offers 31.6 Ah of deep-cycle capacity with GEL technology. Measuring 195 × 131 × 183 mm, it is the direct replacement for power wheelchairs and mobility scooters fitted from the factory with a 31.6 Ah battery of this format.
- GEL: excellent resistance to deep discharge and long cycle life.
- 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 8GU1 is for
The MK Powered 8GU1 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 10.66 kg.
The MK Powered 8GU1: Mk GEL range and GEL technology
Within the MK Powered catalogue, the Mk GEL series groups the references designed for this use. The 8GU1 is the 31.6 Ah model of that family, with the same performance as its siblings in other sizes.
A GEL battery is the choice when cycle resistance and safety matter most: no gases, no liquid and thousands of partial discharges in its lifetime.
Will it fit your current battery tray?
The MK Powered 8GU1 is made in the 195 × 131 × 183 mm format and weighs 10.66 kg. Checking the three dimensions and the terminal position before buying avoids the most common mistake when replacing a battery.
MK Powered: the maker behind the 8GU1
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.
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 8GU1 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
Orders placed before 6:00 pm with the battery in stock ship the same day. Delivery in mainland Spain and Portugal takes 24-48 working hours; for the Balearic and Canary Islands and the rest of the European Union allow 3 to 5 working days. You have 14 days to return an unused battery; in mainland Spain and Portugal collection is free. We email you the tracking number as soon as the parcel ships.
BCOM-MK-8GU1
Data sheet
- Brand
- MK
- Reference
- 8GU1
- Model
- MK GEL
- Voltage (V)
- 12
- Length
- 195.80 mm
- Width
- 131.60 mm
- Height
- 183.40 mm
- Weight
- 10.66 Kgs
- Technology
- GEL
- Capacity (C20)
- 31.6Ah (c20)
- Capacity (C10)
- 77Ah (c10)
- Capacity (C5)
- 26.8Ah (c5)
Specific References
- MPN
- 8GU1
4,82/5
Verified purchasesLatest verified reviews
★★★★★Gonzalo Santos
29/05/2026Muy buen asesoramiento
Os animo a llamar si necesitais asesoriamiento, a mi me funcionó
★★★★★Roberto Castro
07/01/2026Muy rápido
Pedí la batería en Viernes y el Lunes ya la tenía aquí
★★★★★Cristian Leon
04/01/2026Me ayudaron paso a paso
Ya me había encantado que me ayudaran con la elección de la MK 8GU1, pero es que encima me asesoraron al momento de instalarla. Todo de 10
★★★★★Mariano Gallardo
25/12/2025Buenos precios
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 8GU1 a GEL battery? What is GEL used for?
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 8GU1 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.
How long does the MK Powered 8GU1 battery last?
Expected lifespan of the MK Powered 8GU1 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 are the dimensions of the MK Powered 8GU1 battery?
Dimensions (length × width × height) are 196×132×183 mm — also written as 196x132x183 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 8GU1?
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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