The biggest concern someone would have in purchasing a device like this is its practicality both in installation and use, and the overall results. Is it worth purchasing a $35 solar charger to maintain a battery? If you have a vehicle, or sit down mower, or motorcycle that is used infrequently especially for longer periods of time it is a very worthwhile investment. Running a battery all the way down to being totally uncharged is not the healthy procedure for maintaining the overall life of a battery; not to mention having to take the time and inconvenience in order to recharge a battery before using a vehicle that isn't on a trickle charge.The challenge that confronts us is how to mount it in such a way that it can get juice to your battery without having to remove the battery from the vehicle or wind up with the hood open a crack creating a trailer park scenario of the car with the hood open hooked up to a charger.The beauty of the NOCO BLSOLAR5 is that it comes with two hookup wires. One is the typical battery hookup with two clamps that would go directly on the battery poles. The other wire is the cigarette lighter adapter which would feed your car battery without even having to lift the hood. So for the ultimate in convenience you could just place the solar panel on your dashboard facing your car toward the south, or underneath a side or rear window where the sun rises and sets and get a good charge with only the cigarette lighter plug in attached. If you wanted to use the car there wouldn't be hardly any inconvenience at all simply unplugging it and moving the solar panel aside.The other practical use would be if you have a shed housing your garden equipment such as a sit down lawnmower you could attach this solar panel outside through the 4 mounting holes on each corner and run the wire inside. You can hook it up using the battery charging clamps wire and forget about it for the winter.Now onto practicality in terms of price and return on investment: solar panels have a life expectancy of about 20 to 40 years. Without going into the formulas I accessed regarding how much electricity a typical trickle charger uses, the results were a range of $1 to $3 per month. So you should expect to recapture your investment in this NOCO Solar Battery Charger in 1 to 3 years of constant use. Solar panels having a 20 to 40 year life expectancy beyond that makes this a no-brainer in the long run; if it were 40 years at $3 per month for a regular trickle charger that would be $1440 added to your electrical bill. You also have the advantage of being a go-green supporter considering that no fossil fuels or nuclear fuel was spent in making the electricity.So let's add it up. It will pay for itself many times over in the long run. You have the convenience of keeping a battery topped up so the vehicle, motorcycle, ATV etc. is always at the ready, and it will preserve the life of your batteries which aren't cheap by keeping them topped up. Great idea and glad to see solar hit a price point that makes it very practical. Highly recommended.