Mk powered ES26-12SA · Wheelchair battery 12V 26Ah AGM
Specifications
| Brand | MK POWERED |
|---|---|
| Part number | ES26-12SA |
| Voltage (V) | 12 |
| Capacity (C20) | 26Ah (c20) |
| Capacity (C5) | 22.1Ah (c5) |
| Technology | AGM |
| Length | 166.10 mm |
| Width | 175.00 mm |
| Height | 125.00 mm |
€93.90
VAT included
4,73/5★★★★★10 reviewsVerified purchases
- ★★★★Victor Leon:
Gracias por el asesoramiento
- ★★★★★Jaime Pastor:
Resuelven tus dudas y te ayudan con la instalación
- ★★★★★Felipe Prieto:
Supe cual batería necesitaba mi coche gracias a su asesoría
MK Powered ES26-12SA 12V 26Ah 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
26 Ah
Dimensions
166×175×125 mm
Technology
AGM
Weight
7,98 kg
Model
MK AGM
Mobility battery MK Powered ES26-12SA Mk AGM 26Ah 12V
12VVoltage
26AhCapacity
7.98kgWeight
The MK Powered ES26-12SA with AGM technology delivers 26 Ah at 12 V with the cycle life that power wheelchairs, mobility scooters and light electric vehicles demand. Measuring 166 × 175 × 125 mm, it is the direct replacement for power wheelchairs and mobility scooters fitted from the factory with a 26 Ah battery of this format.
- No maintenance, no water top-ups.
- Approved for air and sea transport (VRLA).
- AGM: faster recharging and better cycle resistance than a conventional battery.
- Sealed AGM/GEL: safe indoors and in transport.
Dimensions, polarity and mounting
It has external dimensions of 166 × 175 × 125 mm and weighs 7.98 kg. Checking the three dimensions and the terminal position before buying avoids the most common mistake when replacing a battery.
What the MK Powered ES26-12SA is for
The MK Powered ES26-12SA 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 7.98 kg.
The MK Powered ES26-12SA: Mk AGM range and AGM technology
The Mk AGM is the MK Powered range the ES26-12SA 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.
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.
What MK Powered does differently
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. We guarantee that every MK Powered arrives new, charged and with the manufacturer's full warranty.
Warranty and coverage
The MK Powered ES26-12SA 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
Recharge the wheelchair or scooter after each use and do not leave it discharged for days: lead sulphates and loses capacity. Charge with a charger that has an AGM mode: it limits the voltage and protects the glass-fibre separators.
Delivery times 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-ES26-12SA
Data sheet
- Brand
- MK
- Reference
- ES26-12SA
- Model
- MK AGM
- Voltage (V)
- 12
- Length
- 166.10 mm
- Width
- 175.00 mm
- Height
- 125.00 mm
- Weight
- 7.98 Kgs
- Technology
- AGM
- Capacity (C20)
- 26Ah (c20)
- Capacity (C5)
- 22.1Ah (c5)
Specific References
- MPN
- ES26-12SA
4,73/5
Verified purchasesLatest verified reviews
★★★★★Victor Leon
21/09/2026Gracias por su asesoramiento
Gracias por el asesoramiento
★★★★★Jaime Pastor
12/02/2026Ayudan con la instalación
Resuelven tus dudas y te ayudan con la instalación
★★★★★Felipe Prieto
04/02/2026Llegó en plazo
Supe cual batería necesitaba mi coche gracias a su asesoría
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 ES26-12SA an AGM battery and what are the benefits of AGM?
Yes. The ES26-12SA 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 ES26-12SA 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 ES26-12SA 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 ES26-12SA battery?
Dimensions (length × width × height) are 166×175×125 mm — also written as 166x175x125 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 ES26-12SA?
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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