Will a USB stick drain my car's battery?

Does leaving a USB stick connected and/or a phone charger discharge the battery? My wife's Honda CR- has just done a 100 mile journey, yet a few days later the battery was dead. Has the USB stick done this?

Asked on 10 February 2015 by Knight Templar

Answered by Honest John

Not normally, no. The reason is more likely to be a fault with the interior light 'see you out' switch remaining live. Best to always switch the light off completely so it doesn't come on when you open a door.

Tags: batteries technical issues

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