Miele HS18 Operating Instructions Manual page 11

Correct use
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Do not drop or throw the rechargeable battery. For safety reasons,
do not continue to use a battery which has been damaged.
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Keep the rechargeable battery or the batteries away from naked
flames or other heat sources. Do not heat the rechargeable battery
or the batteries. Do not expose them to direct sunlight.
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Do not dismantle the rechargeable battery.
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Do not cause a short circuit by bridging the contacts of the
rechargeable battery or the batteries, either unintentionally or
deliberately.
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Do not allow the rechargeable battery or the batteries to come
into contact with liquids.
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Do not attempt to recharge the remote control batteries provided.
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Disposing of the batteries and the rechargeable battery: remove
the rechargeable battery from the robot vacuum cleaner and the
batteries from the remote control. Insulate the metal contacts with
adhesive tape to prevent short circuits. Dispose of the batteries and
the rechargeable battery in a municipal recycling facility. Do not
dispose of batteries or the rechargeable battery with normal
household waste.
Warning and Safety instructions
11