Have a like new Optimate lithium diagnostic charger +tester microprocessor LFP 4s 5A with a voltmeter in like new backpack. Also have a used Sena motorcycle helmet which is USB capable. Bought slightly used and I’ve never used it so I don’t know if the USB worked. Got a motorcycle and was going to learn to ride, but didn’t. Now I have this gear. $200 gets you everything.