Battery drainage with USB chargers

[CT_Ron]

I have installed 3 USB chargers, all using an independent buck converter (12v to 5v). Do the converters draw current even when not used?

My battery is too low on power for the bike to start when not used for 5-6 days. The USB chargers have an on/off switch, but the converters sit before that. They are hooked directly to the battery.

[__Ray__]

Yes

[CT_Ron]

Originally Posted by __Ray__

Yes

Short and direct, love it.

But, are 3 converters enough to drain an entire 11,2Ah battery in a week?

[Showkey]

Yes


Even one can drain the battery over a period of days at least to level of no crank.

[CT_Ron]

Alright then, I was unaware of this. I'll solder an on/off switch between the battery and converters then. That should fix it. Thanks 

[Matlock]

The best solution is to run them from a relay triggered from a switched live, unless you specifically need to use them when the ignition is switched off. Are they fused? They should be.

[CT_Ron]

I'm going to put a waterproof switch somewhere outside for easy on/off acces. I do need them to run power with the bike turned off, but judging by how fast it drains,  thinking of didging that idea and only charge my electronics while riding. Going to Norway in 3 weeks

[Showkey]

Problem with the switch..........it can be forgotten to be switch off at the worst possible time.

Where this also comes up is GPS direct powered from the battery........where the unit is “forgotten” and not shut off.