I run a Gerbings sleeved vest, electric gloves, GPS and an audio amplifier for my MP3s ( iPod ) and have no problems. I have a digital voltmeter that I use to check things out. At idle naturally you will be discharging but cruising you will be alright. I run my lowbeams only. When my wife rides we share the heat by the way of a switch which I made so we can alternate the Gerbings connection. I might run 5 minutes for myself, then switch to my wife for 10 minutes, back to me again, etc. If you have extra lights this may not apply.
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