USB Charger port for bike

[Spanglepants]

I'm after a USB charger port for my bike but remember reading they needed to be wired in a certain way so they only charged when the bike was running.
Can anyone confirm and say how it needs to be wired? I'm hopeless at anything electrical and maybe which one I should go for. I've looked but no idea, thanks

[Spanglepants]

Ok thanks, bike is Kawasaki ZRX 1200. I don't have an Optimate. Are those ones on Amazon on Ebay all roughly the same but its just how you wire them that makes the difference?
Do i wire it from the battery or from ,say, the little light above the headlight for example?

[Spanglepants]

Looks good, but the bit about hooking it up to the mains puts me off. I wouldn't be doing that. Is it necessary ?

BobSaunders said:

http://optimate.co.uk/o-101.htm

http://optimate.co.uk/tm71.htm

The upside of this solution is that if the battery discharges down to 12v then it cuts the connection.

A USB will always draw power unless switched - but it is minimal.. especially if you hook up the bike to the mains after every trip.

Threading the cable from the battery to the headstock will be the biggest faff.

[Spanglepants]

Finally getting round to this. The lead arrived today and its just a straight connection to the battery. If I get a relay i assume its just wired inline?
What relay would be suitable ( remember i know NOTHING about electrics )
Thanks

[Spanglepants]

I'd like do that but wouldn't know where to begin looking for an ignition live wire?

Mr2Mike said:

A relay just increases complexity, more wiring for no real benefit. A USB charger is going to draw somewhat less than 1 amp even with a 2 amp USB device connected and the main switched ignition wire should be more than capable of this tiny extra load. It's really not rocket science, you just need to find the main switched ignition wire and splice into it, ensuring you use a fuse on the new wiring.

[Spanglepants]

Thanks, it's different - i cant get on with sports bikes any longer, getting to that age of aching shoulders and wrists😁

Private Pile said:

Cracking bike OP