Mk powered ES50-12 · Wheelchair battery 12V 50Ah AGM
Specifications
| Brand | MK POWERED |
|---|---|
| Part number | ES50-12 |
| Voltage (V) | 12 |
| Capacity (C20) | 50Ah (c20) |
| Capacity (C10) | 47.50Ah (c10) |
| Capacity (C5) | 42.5Ah (c5) |
| Technology | AGM |
| Length | 198.90 mm |
| Width | 166.10 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
4,76/5★★★★★51 reviewsVerified purchases
- ★★★★★Mariano PeÑa:
Gracias por asesorarme en la instalación de la batería
- ★★★★Josep MuÑoz:
Tenía dudas de que batería elegir y me indicarón la mejor opción además se ofrecieron a asesorarme con la instalación. Increíble y super…
- ★★★★★Mohamed Vazquez:
Supe cual batería necesitaba mi coche gracias a su asesoría
MK Powered ES50-12 12V 50Ah is a sealed AGM/GEL battery for daily mobility use: maintenance-free, no risk of spills, and thousands of useful cycles well beyond a starter battery.
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
50 Ah
Dimensions
198×166×170 mm
Technology
AGM
Weight
15,06 kg
Model
MK AGM
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Mobility battery MK Powered ES50-12 Mk AGM 50Ah 12V
12VVoltage
50AhCapacity
15.06kgWeight
The 12 V, 50 Ah MK Powered ES50-12 from the Mk AGM range with AGM technology is the standard replacement for power wheelchairs, mobility scooters and light electric vehicles. It measures 198 × 166 × 170 mm, the format sought by anyone replacing a 50 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.
What the MK Powered ES50-12 is for
The MK Powered ES50-12 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 15.06 kg.
Will it fit your current battery tray?
In terms of format, the MK Powered ES50-12 measures 198 × 166 × 170 mm (length × width × height) and weighs 15.06 kg. Before replacing it, measure your current battery tray: if all three dimensions and the terminal positions match, the swap is direct and needs no adapters.
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. We guarantee that every MK Powered arrives new, charged and with the manufacturer's full warranty.
The MK Powered ES50-12: Mk AGM range and AGM technology
The ES50-12 is part of the MK Powered Mk AGM range. Choosing the right reference within the series comes down to capacity, dimensions and terminals: technology and quality are common to the whole family.
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.
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. Charge with a charger that has an AGM mode: it limits the voltage and protects the glass-fibre separators.
Official warranty
The MK Powered ES50-12 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
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-ES50-12
Data sheet
- Brand
- MK
- Reference
- ES50-12
- Model
- MK AGM
- Voltage (V)
- 12
- Length
- 198.90 mm
- Width
- 166.10 mm
- Height
- 170.90 mm
- Weight
- 15.06 Kgs
- Technology
- AGM
- Capacity (C20)
- 50Ah (c20)
- Capacity (C10)
- 47.50Ah (c10)
- Capacity (C5)
- 42.5Ah (c5)
Specific References
- MPN
- ES50-12
4,76/5
Verified purchasesLatest verified reviews
★★★★★Mariano PeÑa
06/05/2026No sabía qué batería elegir y me asesoraron
Gracias por asesorarme en la instalación de la batería
★★★★★Josep MuÑoz
20/01/2026Gran 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
★★★★★Mohamed Vazquez
06/01/2026Gracias
Supe cual batería necesitaba mi coche gracias a su asesoría
★★★★★Iker Flores
20/10/2025Me ayudaron a elegir la batería correcta
Gracias por asesorarme en la instalación de la bateria
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 ES50-12 model AGM? What does this technology offer?
Yes. The ES50-12 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 ES50-12 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 ES50-12 model?
Expected lifespan of the MK Powered ES50-12 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 measurements of the ES50-12 model?
Dimensions (length × width × height) are 199×166×171 mm — also written as 199x166x171 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.
What are the equivalents of the ES50-12 model?
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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