Folding All-Terrain Power Wheelchair With Dual Brushless Motors
HKM-3338707 Electric Wheelchair
The HKM-3338707 is a folding electric wheelchair built on a lightweight aluminum alloy frame with dual 250 W brushless hub motors and two 12 Ah lithium battery packs. It supports up to 330 lb (150 kg), reaches 3.7 mph top speed, and travels approximately 12.4 mi (20 km) per charge on level ground. The one-touch folding mechanism collapses the chair into a compact form that fits in most vehicle trunks, while an electromagnetic braking system stops the chair instantly when the joystick is released.
Dual 250 W Brushless Motors2 x 12 Ah Lithium Packs330 lb Load Capacity3.7 mph Top SpeedAluminum Alloy FrameElectromagnetic Brake SystemOne-Touch Folding Design~12.4 mi Range per Charge
Motor Power
Dual 250 W
Brushless hub motors, front-wheel drive
Battery
2 x 12 Ah Li-ion
576 Wh total, dual removable packs
Top Speed
3.7 mph
6 km/h, joystick controlled
Range
~12.4 mi
20 km on level ground, per charge
Load Capacity
330 lb
150 kg maximum user weight
Climbing Angle
Up to 8 deg
Motorized incline assistance
Overview
The HKM-3338707 uses an aircraft-grade aluminum alloy frame that keeps total weight low while maintaining enough rigidity to support a 330 lb occupant. The frame folds at a central hinge with a single release so the entire chair collapses into dimensions roughly 26 x 14 x 30 inches -- small enough to stow in a car trunk, an SUV cargo area, or a closet between uses. Welded joints are finished to resist corrosion, and the black powder-coat finish gives the chair a clean, modern appearance.
Two 250 W brushless hub motors drive the wheels directly, delivering smooth acceleration and quiet operation at speeds up to 3.7 mph. Because there are no gears or belts between motor and wheel, maintenance stays minimal and efficiency remains high across varied terrain. The motors are paired with an electromagnetic braking system that applies holding force the instant the joystick is released, so the chair does not roll on inclines or ramps when the user lets go of the controller.
Power comes from two independent 12 Ah lithium-ion battery packs mounted under the seat on either side of the frame. Each pack can be removed independently for indoor charging, and both together store roughly 576 Wh of energy. On flat pavement with a rider near the middle of the weight range, a full charge delivers approximately 12.4 mi (20 km) of travel distance. The included charger accepts 100-240 V input and restores a depleted pack in 6-8 hours.
The seating area features a padded cushion with breathable fabric, flip-up armrests for easy side transfers, and a swing-away footrest with a textured anti-slip surface. An adjustable backrest lets users set a comfortable recline angle. Eight-inch front wheels with solid honeycomb tires resist punctures on urban surfaces, while twelve-inch rear wheels with pneumatic tread absorb bumps and grip uneven ground. Small anti-tip wheels at the rear add stability on slopes.
Key Features
Dual 250 W Brushless Hub Motors
Each wheel is driven by its own 250 W brushless motor housed inside the hub. This direct-drive layout eliminates chains, belts, and gearboxes that require regular adjustment or replacement. The motors respond smoothly to joystick input from a standstill up to the 3.7 mph top speed, and they operate quietly enough for indoor use in residential settings without disturbing others.
Dual Removable 12 Ah Lithium Packs
Two 12 Ah lithium-ion battery packs mount beneath the seat, one on each side of the frame. Each pack can be detached independently by releasing a latch and lifting it out, which makes indoor charging convenient when outdoor outlets are unavailable. Together the packs hold approximately 576 Wh of energy, enough for roughly 12.4 mi (20 km) of travel on level pavement under typical conditions.
One-Touch Folding Aluminum Frame
A single lever release unlocks the frame at its central hinge, allowing the chair to fold into a compact block measuring roughly 26 x 14 x 30 inches. The aluminum alloy construction keeps the folded weight manageable for lifting into a trunk or storing in a closet. Corrosion-resistant welds and a durable powder-coat finish help the frame maintain its appearance over years of daily use.
Intelligent Electromagnetic Braking System
When the user releases the joystick controller, electromagnetic brakes engage automatically on both drive wheels. There is no manual brake lever to pull and no delay between letting go and stopping. This design prevents rollback on ramps and holds the chair stationary on inclines up to the rated 8 degree limit, giving the user confidence on sloped sidewalks and driveway approaches.
360-Degree Joystick Controller
The proportional joystick sits on a swing-away mount beside the right armrest. Pushing the stick in any direction drives the chair smoothly in that direction, and the sensitivity is calibrated for precise maneuvering in doorways and around furniture. A simple button interface on the controller handles power on/off, speed selection, and battery status indication.
Padded Seat With Adjustable Backrest
The seat cushion uses breathable fabric over high-density foam to distribute pressure evenly during extended sitting periods. The backrest angle can be adjusted manually to match the user's preferred posture. Flip-up armrests clear out of the way for lateral transfers to and from beds, toilets, or car seats.
All-Terrain Wheel Configuration
Eight-inch front wheels with solid honeycomb tires roll over door thresholds and sidewalk cracks without puncturing. Twelve-inch rear wheels with pneumatic tread provide shock absorption and grip on grass, gravel, and paved surfaces alike. Small anti-tip wheels at the rear contact the ground first on steep descents, reducing the risk of tipping backward.
Swing-Away Footrest With Textured Surface
The footrest swings to the side to make standing up and sitting down easier, then locks back into position for riding. Its top surface has a molded texture that helps keep the user's feet from sliding forward, even if the shoes are wet. The height of the footrest can be adjusted to accommodate different leg lengths.
Full Specifications
Model
HKM-3338707 | Electric Wheelchair
Frame Material
Aircraft-grade aluminum alloy, corrosion-resistant welded joints
Motor Type
Dual brushless hub motors, direct-drive
Motor Power
250 W per motor (500 W combined output)
Battery Voltage
24 V DC system (two 12 V packs in series)
Battery Capacity
2 x 12 Ah lithium-ion (24 Ah total)
Removable Battery
Yes, two independent detachable packs
Charge Time
6-8 hours from empty with supplied charger
Charger Input
100-240 V AC, 50/60 Hz universal
Top Speed
3.7 mph (6 km/h)
Range per Charge
Approximately 12.4 mi (20 km) on level ground
Climbing Angle
Up to 8 degrees
Turning Radius
Approximately 29 in (74 cm)
Front Wheels
8 in diameter, solid honeycomb tires
Rear Wheels
12 in diameter, pneumatic all-terrain tires
Brake System
Intelligent electromagnetic brake (engages on joystick release)
Controller
360-degree proportional joystick with speed selection
Seat Width
Approximately 18 in (46 cm)
Seat Depth
Approximately 17 in (43 cm)
Backrest Height
Approximately 21 in (53 cm)
Armrests
Flip-up padded armrests, swing-away design
Footrest
Swing-away with textured anti-slip surface, height adjustable
Folded Dimensions
Approximately 26 x 14 x 30 in (66 x 35 x 76 cm)
Product Weight
Approximately 63 lb (28.5 kg) without batteries; 69 lb (31.3 kg) with both batteries
Load Capacity
330 lb (150 kg) maximum
Battery, Range, and Charging
The HKM-3338707 draws power from two 12 Ah lithium-ion battery packs wired in series to produce a 24 V system. Combined energy storage is approximately 576 Wh. Real-world range on a full charge falls in the band of 10-15 mi (16-24 km) depending on occupant weight, terrain, average speed, and how often the chair stops and starts. A 165 lb rider on smooth indoor flooring at moderate speed will see the upper end of that range; a 300 lb rider on outdoor grades with frequent turns will see the lower end.
Lithium-ion chemistry does not have a memory effect, so partial charges between outings cause no harm. In fact, keeping the packs between 20 and 80 percent charge for day-to-day use extends their total cycle life compared with running them to empty before every recharge. The packs include a battery management system (BMS) that balances cell voltages, prevents over-discharge, and cuts off charging current when the pack is full.
Tip: Store battery packs indoors between 40 F and 80 F (4 C and 27 C) whenever possible. Extreme cold reduces available capacity temporarily and repeated exposure to heat above 95 F (35 C) accelerates chemical aging. If the chair will sit unused for more than a month, discharge the packs to roughly 50 percent and recharge them every four to six weeks.
Each of the two battery packs detaches independently with a latch release and lifts out by its built-in handle. A keyed lock secures each pack in its mount to deter theft. You can charge a pack while it is installed in the chair through the frame-mounted charge port, or remove it and charge it at a desk or kitchen counter using the same charger. The packs are compact enough to fit in a backpack or tote bag for transport.
Daily Use & Care
- Charge the batteries indoors at room temperature whenever possible. Cold garages slow charging and temporarily reduce available capacity.
- Wipe the frame and joystick housing with a damp cloth after use on dusty paths or wet pavement. Avoid spraying water directly onto the motor housings or the charge port.
- Check tire pressure on the rear pneumatic wheels weekly. Run them at the pressure printed on the tire sidewall to balance ride comfort and range.
- Inspect the footrest latch and armrest hinges monthly. Tighten any loose fasteners with the supplied tools before they work free.
- If the chair will sit unused for more than three weeks, store the batteries at roughly half charge and top them up every four to six weeks.
- Keep the joystick cover closed when the chair is outdoors so moisture and dust do not reach the controller contacts.
- Fold the chair and lock it in the collapsed position before lifting it into a vehicle. The folded shape is more stable to carry than the open frame.
What's in the Box
- 1 x HKM-3338707 electric wheelchair, partially assembled
- 2 x 12 Ah removable lithium-ion battery packs with locks
- 1 x 2 A smart charger (100-240 V AC input, 24 V DC output)
- 1 x 360-degree joystick controller with mounting bracket
- 1 x User manual and quick-start guide
- 1 x Toolkit with hex wrenches and spare fuses
- 1 x Battery charger power cord
- 1 x Set of keys for battery locks
Frequently Asked Questions
How far can I travel on a single charge?+
Under typical conditions on level pavement with a rider in the middle of the weight range, expect approximately 12.4 mi (20 km). Heavier occupants, steep terrain, frequent stopping and starting, and cold weather all reduce that figure. Lighter riders on smooth indoor floors may exceed it.
How long do the batteries take to fully charge?+
Each 12 Ah pack takes roughly 6-8 hours to recharge from empty using the supplied 2 A charger. Since there are two separate packs, you can charge them one after the other or simultaneously if you add a second charger.
Can I take this wheelchair on an airplane?+
The lithium-ion battery packs are designed to meet IATA requirements for carry-on mobility device batteries. Contact your airline in advance to confirm their specific policy, and arrive at the gate early so ground crew can verify the battery configuration.
What is the difference between this and a standard manual wheelchair?+
The HKM-3338707 propels itself with twin electric motors controlled by a joystick, so the user does not need to push the handrims or rely on a caregiver. It also folds much more compactly than most manual chairs, making it easier to transport in a vehicle.
Are the batteries removable for indoor charging?+
Yes. Both 12 Ah packs detach independently from mounts under the seat. Each has a built-in handle and a keyed lock. You can bring one or both packs inside to charge while the chair stays in your vehicle or garage.
What surfaces can this wheelchair handle?+
The chair is designed for indoor floors, sidewalks, paved paths, packed gravel, and short grass. The 8 deg climbing rating covers most ADA-compliant ramps and moderate driveway slopes. It is not intended for deep sand, deep snow, or steep off-road trails.
How do I fold and unfold the chair?+
Pull the folding lever located near the seat hinge to release the frame lock, then fold the backrest forward until the chair collapses into its compact shape. To unfold, pull the lever again and spread the frame open until the latch clicks into place. The whole process takes a few seconds.
Does the chair have a weight limit I should observe?+
The maximum rated load capacity is 330 lb (150 kg). This includes the occupant's body weight plus any items placed on the seat or hanging on the chair. Staying within this limit preserves motor life, battery range, and frame integrity over time.
Service & Policies
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Every order ships free. Handling Time: 0-1 business days (Monday to Friday). Transit Time: 2-5 business days (Monday to Friday). A tracking number is emailed as soon as the parcel leaves our warehouse.
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Your purchase is protected for 180 days from the delivery date against manufacturing defects and damage in transit. If something arrives wrong, we make it right.
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Not completely satisfied? Request a return within 30 days of delivery for a full refund. We keep the process simple and hassle-free.
24 Months Warranty Service
The product is covered by a 24-month warranty from the delivery date against manufacturing defects. Coverage includes parts and labor; normal-wear items are excluded.
CE CertifiedFDA RegisteredUN38.3 Battery Safe576 Wh Total EnergyDual Brushless MotorsElectromagnetic BrakeAirline Approved
Why Choose the HKM-3338707
Folds Into a Trunk-Sized Package
The aluminum frame collapses with one lever release into a compact block roughly 26 x 14 x 30 inches. That fits in the trunk of a sedan, the cargo space of an SUV, or a storage closet. No tools and no disassembly required -- fold and go.
Dual Batteries Mean Double the Convenience
With two separate 12 Ah packs, you can remove one at a time for indoor charging while the other stays locked in the chair as backup. If you own a second charger, both packs can charge simultaneously, cutting total recharge time roughly in half.
Electromagnetic Brakes Hold on Slopes
Releasing the joystick triggers both wheel brakes instantly. There is no manual lever to pull and no rolling backward on ramps, driveways, or sidewalk inclines within the 8 degree rating. This design reduces the cognitive load on the user in situations that require frequent stops.
Brushless Motors Are Quiet and Low-Maintenance
Direct-drive brushless hubs have no internal brushes to wear out, no chain to oil, and no gearbox to service. They run nearly silent, which matters indoors where motor noise would otherwise disturb household members, coworkers, or fellow diners at a restaurant.
330 lb Capacity in a Portable Frame
The reinforced aluminum frame on the HKM-3338707 is rated for 330 lb (150 kg), yet the chair still folds down and stays light enough for one adult to lift into a car trunk with both battery packs removed. That combination suits heavier occupants who also need a chair they can transport without a ramp or a lift.
All-Terrain Wheels Handle Real Sidewalks
Solid honeycomb front tires shrug off glass, thorns, and metal debris that would puncture air-filled tires. Pneumatic rear tires with tread grip grass, gravel, cracked pavement, and shallow curb cuts. The pair gives you puncture resistance where you need it and ride comfort where you feel it.
Controls & Indicators
Power Button
Press and hold the button on the joystick controller to switch the system on or off. A short press cycles through speed settings.
Joystick
Push the stick in the direction you want to travel. Release it to stop -- the electromagnetic brakes engage automatically. The further you push, the faster the chair moves up to 3.7 mph.
Speed Selection
Press the mode button on the controller to cycle through available speed levels. Lower settings give finer control indoors; higher settings are better for open outdoor areas.
Battery Indicator
LED bar graph on the controller shows remaining charge at a glance. Plan to recharge when the indicator drops to the last segment.
Horn Button
A dedicated horn button on the controller sounds an audible alert. Use it to signal your presence in hallways, crossings, or crowded spaces.
Brake Release Lever
A manual override near the motor housing disengages the electromagnetic brake for freewheel pushing when the chair is powered off. Engage it again before driving.
Charge Port
Located on the underside of the seat frame near the battery mounts. Lift the rubber cap and plug in the charger cable to charge batteries in-place.
Pre-Ride Safety Checklist
- Confirm both battery packs are seated, locked, and show charge on the joystick display before leaving home.
- Test the electromagnetic brake by releasing the joystick on a gentle slope. The chair should hold position without rolling.
- Inspect all four tires for embedded debris, cracks, or visible wear before each outing.
- Verify the footrest latches securely and the swing-away mechanism moves freely without binding.
- Check that both armrests flip up and lock back into place for safe transfers.
- Confirm the anti-tip wheels at the rear are intact and rotate freely.
- Test forward, reverse, and turning response in a clear area before entering crowded spaces.
- Fasten the seat belt if your model is equipped with one, and adjust it for a snug but comfortable fit.
Quick Troubleshooting
The chair does not move when I push the joystick.+
First confirm the power is on and the battery indicator shows charge. Check that both battery packs are fully seated and locked. If the chair still does not respond, inspect the brake release lever to confirm the electromagnetic brake is engaged for driving mode.
The chair travels a shorter distance than it used to.+
Range decline is normal as batteries age but can be accelerated by cold temperatures, underinflated rear tires, or frequent heavy-load use. Check rear tire pressure first, then consider whether the packs have gone through more than 500 charge cycles. If range has dropped below 60 percent of the original figure, the packs may be nearing end of service life.
The joystick feels stiff or unresponsive.+
Dust or debris around the joystick base can cause sticking. Gently wipe the base with a dry cloth and test movement in all directions. If stiffness persists, check that nothing is pressing against the joystick cable underneath the armrest.
I hear a clicking sound from one of the wheels.+
An intermittent click from a motor hub usually indicates a loose connection inside the motor assembly or debris caught between the hub shell and the frame stop. Stop using the chair and arrange for a qualified technician to inspect the affected motor.
The electromagnetic brake does not hold on a slope.+
If the chair rolls backward when the joystick is released on an incline, the brake may not be engaging fully. First confirm the slope is within the 8 deg rating. If it is, power the chair off and on again to reset the controller. If the problem continues, the brake solenoid may need service.
One battery pack will not accept a charge.+
Check that the pack is properly seated in its mount and the charge cable connection is clean and tight. Inspect the port for debris or corrosion. If the pack still will not charge, the internal BMS may have tripped due to deep discharge -- leave it connected to the charger for up to 30 minutes to allow the BMS to reset.
Certifications & Standards
The HKM-3338707 is manufactured in a facility operating under ISO 9001 quality management and ISO 13485 medical device quality standards. The electrical assembly, battery cells, and materials carry the documentation required for distribution in the US market.
- CE - European Conformity marking covering the electromechanical assembly and safety systems.
- FDA - Registered medical device manufacturer listing for mobility aids.
- UN38.3 - Lithium battery transport safety testing for air, sea, and ground shipping.
- ISO 9001 - Quality management system certification held by the manufacturing facility.
- ISO 13485 - Medical device quality management system certification.
Important Safety Notes
Read the complete user manual before operating the HKM-3338707 for the first time. Practice joystick control and braking response in a clear, open area free of obstacles, traffic, and drop-offs until the chair's behavior feels predictable. Never exceed the 330 lb (150 kg) load capacity, and always engage the seat belt when equipped.
- Confirm the electromagnetic brake engages immediately when the joystick is released before riding on any slope or ramp.
- Keep hands, feet, and loose clothing clear of the wheels and motor housings while the chair is powered on.
- Reduce speed and approach curbs, railroad tracks, and uneven surfaces at a right angle rather than diagonally.
- Do not attempt to climb or descend slopes steeper than 8 degrees. The motors and brakes are rated for this maximum.
- Charge batteries only with the supplied charger, indoors, on a non-flammable surface, and never leave a charging pack unattended overnight.
- Do not modify the controller, motor wiring, or battery packs. Unauthorized modifications void certifications and create safety hazards.
- Inspect tires, brakes, armrest latches, and the footrest mechanism before each day's use.
- If the chair exhibits unusual noise, vibration, or loss of braking function, stop using it immediately and arrange for qualified service.
HKM-3338707 · dual 250 W brushless hub motors · 2 x 12 Ah lithium packs (576 Wh) · 3.7 mph top speed · 12.4 mi (20 km) range · 330 lb (150 kg) load capacity · aluminum alloy frame · electromagnetic brake · 8 deg climbing angle · 29 in turning radius. Specifications are provided for reference; actual performance varies with occupant weight, terrain, surface, temperature, and use. This page describes the product only and is not medical advice - consult a qualified clinician about seating and mobility needs.
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