Mk powered ES33-12 · Wheelchair battery 12V 35Ah AGM
Specifications
| Brand | MK POWERED |
|---|---|
| Part number | ES33-12 |
| Voltage (V) | 12 |
| Capacity (C20) | 35Ah (c20) |
| Capacity (C10) | 33.25Ah (c10) |
| Capacity (C5) | 29.75Ah (c5) |
| Technology | AGM |
| Length | 196.10 mm |
| Width | 130.00 mm |
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Thank you
4,76/5★★★★★48 reviewsVerified purchases
- ★★★★★Jorge PeÑa:
Supe cual batería necesitaba mi coche gracias a su asesoría
- ★★★★★Alex Flores:
Resuelven tus dudas y te ayudan con la instalación
MK Powered ES33-12 12V 35Ah 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
35 Ah
Dimensions
196×130×180 mm
Technology
AGM
Weight
10,48 kg
Model
MK AGM
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Mobility battery MK Powered ES33-12 Mk AGM 35Ah 12V
12VVoltage
35AhCapacity
10.48kgWeight
Designed for power wheelchairs, mobility scooters and light electric vehicles, the MK Powered ES33-12 from the Mk AGM range offers 35 Ah of deep-cycle capacity with AGM technology. Measuring 196 × 130 × 180 mm, it is the direct replacement for power wheelchairs and mobility scooters fitted from the factory with a 35 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.
What the MK Powered ES33-12 is for
With 35 Ah, the MK Powered ES33-12 offers the daily range that power wheelchairs, mobility scooters and light electric vehicles need, with a sealed construction that is safe indoors. Check that it matches your current battery in dimensions, terminals and hold-down: this reference has a weight of 10.48 kg.
Dimensions, polarity and mounting
In terms of format, the MK Powered ES33-12 measures 196 × 130 × 180 mm (length × width × height) and weighs 10.48 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.
MK Powered: the maker behind the ES33-12
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 ES33-12: Mk AGM range and AGM technology
The ES33-12 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.
In an AGM battery the electrolyte is absorbed in glass-fibre separators: there is no free liquid, it cannot spill and it can be mounted at an angle. That construction lowers internal resistance, speeds up recharging and multiplies cycle life compared with a conventional battery.
Usage and maintenance tips
Recharge the wheelchair or scooter after each use and do not leave it discharged for days: lead sulphates and loses capacity. Use the original charger or one compatible with the battery technology (AGM/GEL) and always replace both batteries in the set together.
Warranty and coverage
The MK Powered ES33-12 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.
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-ES33-12
Data sheet
- Brand
- MK
- Reference
- ES33-12
- Model
- MK AGM
- Voltage (V)
- 12
- Length
- 196.10 mm
- Width
- 130.00 mm
- Height
- 180.10 mm
- Weight
- 10.48 Kgs
- Technology
- AGM
- Capacity (C20)
- 35Ah (c20)
- Capacity (C10)
- 33.25Ah (c10)
- Capacity (C5)
- 29.75Ah (c5)
Specific References
- UPC
- 083996097094
- MPN
- ES33-12
4,76/5
Verified purchasesLatest verified reviews
★★★★★Jorge PeÑa
13/02/2026Buenos precios
Supe cual batería necesitaba mi coche gracias a su asesoría
★★★★★Alex Flores
07/02/2026Muy buena ayuda con la instalación
Resuelven tus dudas y te ayudan con la instalación
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 this battery AGM? What is it for?
Yes. The ES33-12 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 do I fit the ES33-12 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 ES33-12 model?
Expected lifespan of the MK Powered ES33-12 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 ES33-12 model?
Dimensions (length × width × height) are 196×130×180 mm — also written as 196x130x180 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 ES33-12?
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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