Amazon.com.au:Customer reviews: Goal Zero Regulated Lithium Yeti Car Charger Used to Safely and Efficiently Charge A Goal Zero Yeti from A 12v Power Source Featuring A Protective 15a User Replaceable Fuse
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This item will not charge a Goal Zero Yeti unless it has more than 13 volts. The only way to get that from a vehicles 12 volt system is have the vehicle running so the amp can provided the necessary current. That should be part of the description. Outside of that the item is a 5 star item. Very good quality and construction. The option of 5 amp or 10 amp provides more options for use.
Well it only lasted a little over a month. Worked great until it fell apart when I unplugged it from the cigarette lighter. I emailed Goal Zero about the problem and haven’t heard back in over a month.