Answer: A functioning device is designed to use little power, but a weak battery, long storage period or faulty equipment can make battery problems more noticeable.
Test the car rather than guessing
If the battery repeatedly goes flat, have the battery condition and charging system checked. Tell the garage there is telematics equipment fitted. If the problem started immediately after installation, contact the insurer as well rather than disconnecting the unit on your own.
The device is designed to draw very little power
A properly working black box should not behave like leaving the headlights on. However, a weak battery, long periods without driving or another electrical fault can make even small background loads more noticeable.
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