Voltmeter worth having?

twobob1

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Hi all was looking for little mods to do and see some people have a voltmeter. Are these worth having? also where would you wire it to? if straight across the battery then it would need a switch. I have my usb socket wired to the hot of the brake light switch if I recall, could it use the same connection or would it mess with the electrics/not get a proper read?.
 
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