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4. Battery (in-built in the wheels)
Maintenance-free, rechargeable lithium-ion batteries are integrated in the twion wheels. For safety reasons they
cannot be removed by the wheelchair driver but if necessary, need to be removed by your authorised specialist
dealer.
Read and observe the following safety instructions and precautions before using the twion and before starting
the charging process. Failure to comply with the safety precautions and instructions may damage the product or
result in electric shock, fire and/or serious injuries. The lithium-ion battery contains chemical substances, which
may cause hazardous reactions if the safety instructions specified here are disregarded. Ulrich Alber GmbH can-
not be held liable for damage caused by non-compliance with the general information and safety instructions.
4.1 Safety instructions for the batteries installed in the twion wheels
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Before using the twion wheels for the first time, the battery should be fully charged.
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The wheels must only be used at temperatures between -25°C and +50°C.
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The wheels must not be exposed to heat (e.g. radiators) or fire. External heat exposure can cause the battery to explode.
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In the (unlikely) event of a battery overheating or catching on fire, you must ensure that the battery does not come into contact with
water or other liquids. The only suitable extinguishing agent that is recommended by the cell manufacturers is sand.
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Your twion uses power in all operating modes. Therefore, if possible, fully charge both batteries after every use.
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The twion wheels and the in-built batteries in particular, must not be opened or disassembled. Improper opening or wilful destruction
of the wheels or the battery carries a danger of serious injury. In addition, opening the battery voids any warranty claim.
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Never connect the wheel socket [2] to metallic objects, or ensure that the contacts do not come into contact with metallic objects (for
example with metal filings).
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If the socket [2] is dirty, clean it with a clean and dry cloth.
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Never immerse the battery in water.
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If damaged or defective, the battery must be checked. Contact your specialist dealer to learn about the proper procedure that must be
used for returns and repairs.
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The wheel with the defective/damaged battery must not be used or opened under any circumstances.
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Always ensure that the twion wheels are kept clean and dry.
4.2 Storing the wheels
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The service life of a battery is partly dependent on its storage location. Therefore do not leave the twion wheels in hot locations for
prolonged periods. In particular, use the boot of a car parked in the sun only for transport rather than as a storage location.
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Store the wheels in a cool and dry location where they are safe from damage and unauthorised access.
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To achieve the optimum battery service life, store the wheels at a temperature from 18°C to 23°C and at a humidity of 0 to 80 per cent.
The charge status under these conditions should be 50 per cent.
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Do not expose the wheels to moisture of any kind during storage (water, rainwater, snow, etc.).
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Before storing them, charge the batteries and check their charge status every 3 months. Charge the batteries, if necessary, to 50 per
cent.
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The wheels should be stored or transported on their rear side or standing up.
4.3 General information on charging the batteries
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Do not charge the batteries in the presence or vicinity of flammable liquids or gases.
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In the (unlikely) event of a battery overheating or catching on fire, you must ensure that the battery does not come into contact with
water or other liquids. The only suitable extinguishing agent that is recommended by the battery manufacturers is sand.
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Never complete the charging process in rooms where moisture may affect the wheels and the in-built batteries.
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Never charge the battery pack at temperatures below 0°C or above 40°C. If you attempt a charging process outside of this temperature
range, the charging process will be automatically aborted.
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