Mk powered ES9-12FR · Wheelchair battery 12V 9Ah AGM
Specifications
| Brand | MK POWERED |
|---|---|
| Part number | ES9-12FR |
| Voltage (V) | 12 |
| Capacity (C20) | 9Ah (c20) |
| Capacity (C5) | 7.65Ah (c5) |
| Technology | AGM |
| Length | 150.90 mm |
| Width | 65.00 mm |
| Height | 102.10 mm |
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4,68/5★★★★★47 reviewsVerified purchases
- ★★★★Ricardo Perez:
Gracias por asesorarme en la instalación de la batería
- ★★★★★Joan Castro:
No sé de baterías pero llamé y me indicarón la que me mi coche necesitaba
- ★★★★Mariano Ramos:
Tenía dudas de que batería elegir y me indicarón la mejor opción además se ofrecieron a asesorarme con la instalación. Increíble y super…
Reviews originally written in Spanish
See all 47 reviewsMK Powered ES9-12FR 12V 9Ah 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
9 Ah
Dimensions
150×65×102 mm
Technology
AGM
Weight
2,69 kg
Model
MK AGM
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Mobility battery MK Powered ES9-12FR Mk AGM 9Ah 12V
12VVoltage
9AhCapacity
2.69kgWeight
The MK Powered ES9-12FR with AGM technology delivers 9 Ah at 12 V with the cycle life that power wheelchairs, mobility scooters and light electric vehicles demand. Measuring 150 × 65 × 102 mm, it is the direct replacement for power wheelchairs and mobility scooters fitted from the factory with a 9 Ah battery of this format.
- AGM: faster recharging and better cycle resistance than a conventional battery.
- 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 ES9-12FR is for
The MK Powered ES9-12FR 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 2.69 kg.
Size, terminals and hold-down of the MK Powered ES9-12FR
The MK Powered ES9-12FR is made in the 150 × 65 × 102 mm format and weighs 2.69 kg. Checking the three dimensions and the terminal position before buying avoids the most common mistake when replacing a battery.
The MK Powered ES9-12FR: Mk AGM range and AGM technology
The Mk AGM is the MK Powered range the ES9-12FR 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.
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. At baterias.com we work directly with the manufacturer or its official distributor: real stock, brand-new product and official warranty.
Warranty and coverage
The MK Powered ES9-12FR 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.
Care and maintenance
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.
Shipping, delivery 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-ES9-12FR
Data sheet
- Brand
- MK
- Reference
- ES9-12FR
- Model
- MK AGM
- Voltage (V)
- 12
- Length
- 150.90 mm
- Width
- 65.00 mm
- Height
- 102.10 mm
- Weight
- 2.69 Kgs
- Technology
- AGM
- Capacity (C20)
- 9Ah (c20)
- Capacity (C5)
- 7.65Ah (c5)
Specific References
- MPN
- ES9-12FR
4,68/5
Verified purchasesLatest verified reviews
Reviews originally written in Spanish
★★★★★Ricardo Perez
03/06/2026Su ayuda fue valiosa
Gracias por asesorarme en la instalación de la batería
★★★★★Joan Castro
15/02/2026Gracias
No sé de baterías pero llamé y me indicarón la que me mi coche necesitaba
★★★★★Mariano Ramos
27/01/2026Te indican cómo hacer la instalación
Tenía dudas de que batería elegir y me indicarón la mejor opción además se ofrecieron a asesorarme con la instalación. Increíble y super recomendada
★★★★★Santiago Guerrero
18/01/2026Rápido y correcto
Uff te saca de un buen apuro, tu pedido llega en menos de 24 horas comprobado
★★★★★Salvador Benitez
10/11/2025Gracias por su asesoramiento
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 MK Powered ES9-12FR an AGM battery and what are the benefits of AGM?
Yes. The ES9-12FR 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 ES9-12FR 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 ES9-12FR model?
Expected lifespan of the MK Powered ES9-12FR 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 size is this battery?
Dimensions (length × width × height) are 151×65×102 mm — also written as 151x65x102 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 ES9-12FR?
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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