Bests & Worsts Reviews from Amazon

I purchased this because one of the customer questions on Amazon was answered by the manufacturer as follows: Question: Can I use this to maintain the charge in my car and leave it unattended for months during winter storage? Answer:Yes, it can safely maintain a battery all winter long. By NOCO Support MANUFACTURER on December 9, 2019 However, as you will see on the cover page of the user manual (image attached) it says not to use it unattended. (I added the red highlight in the attached picture.) I'm sure that it will probably work, but the point is that this is not a must-have purchase. I bought it for peace of mind and convenience on a car that would be stored through the winter. However, that peace of mind is out the window if the manufacturer feels they need to make a disclaimer upfront. Bottom line, it may work as charger, but it is not (according to the manufacturer's manual) recommended to maintain batteries unattended. I suppose the battery maintainer portion is technically true if you are willing to move into your garage and sleep with your car during the winter months [grin].