I have a 1967 Ford truck that can be quite a drain on the battery at times, especially during the colder months. I purchased this before last winter, and never once had an issue with the battery being too low or too cold, despite some pretty frigid temps. I set this on a shelf just in front of and above my truck, and leave the lead to the charger hanging. I then wired the battery end to my battery and channeled it so the plug end can be pulled through the grill. It's nearly invisible when it's not in use, but is very quick and easy to plug up. I've gotten used to just plugging up the truck every time I'm done with it, and this little puppy brings it up to full charge fairly quickly!Highly recommended, especially if you have an older car that either doesn't get driven much or is a heavy drain on the battery.**********************************************************************************Update 01/02/11:Unfortunately, I sold my '67 truck back in the late summer of 2010. However, this little battery tender was still going strong, so I immediately hooked it up to my 4-wheeler. It has been doing a great job keeping the battery on it charged up through some especially cold weather we've had. So after @3years of use, I still give it 5-stars. Awesome product!Update 11/19/12: I noticed something really smelling in my garage, and spent quite a while trying to find it. It was a horrible "ozone" like smell, but clearly was the smell of burning electronics. When I got to my Battery Tender, I noticed the light was no longer on and it smelled really bad, so I immediately unplugged it. I'm not quite sure what happened, but am a little concerned about this. That said, I will consider replacing it as I still believe it's a good product.Update 02/19/13: As these units carry a 10-year limited warranty (if you have your receipt), I decided to send it in. The cost of mailing it was around $9 for standard post, and $11 for Priority Mail. The warranty replacement charge is $12.95 (why not just $13?). So in total, it will cost me just under $25. That is, assuming they replace it, which I certainly hope they will! I will post follow-up later.Update 03/20/13: It took approximately 2 weeks, but Deltran DID replace my charger under warranty. The thing is, the replacement charger - which appears to be brand new, and not refurbished - did not come with ANY paperwork. No "we're sorry for your inconvenience" letter, no receipt, no packing slip... nothing. So my warranty on the replacement will only be as good as the remainder of what I had left on my original 10 years (approx 4 years). The inconvenience of the return was frustrating, and I'd have liked at least an acknowledgement of that from Deltran, but it "is what it is". Hopefully this new one holds up at least as long as the first.