I loved the connections that came with this the easy on and off . I use these on many vehicles and usually buy the cheap harbor freight ones . However I spent up for this for my prize motorcycle . I have it plugged into a battery backup for tv equipment . It stopped working and has a burning smell into it . Customer Service said they would replace it if I sent it in . It is 7 months old but was only put in service for the past week as I had so many others . Thbey scared me saying they often find user error . What could I have done ? I couldn't treat it better . Because it is under a year they said to send in in at my expense and the turnaround is 7- 10 days if they don't determine user error . That's scarey .I still find trusting people is best and I will take the time and expense to send it in though many companies just replace things . I can see why they do not this isn't a cheap piece of equipment . I was very happy for the 7 months ( week it worked ) and I love their quick disconnect plug , sadly I may have lost my battery as it could of broke anytime since it was put in service . I know it was working when first hooked up  . Because I value my equipment so much I am going trust this was a fluke and  buy a extra one to have as I am disabled and these save batteries on vehicles that rarely are driven . I am a little disappointed I had a failure so quick again it was in the first week of use after I stored my purchase since Jan 2013  . Failures was the reason I stopped using the Harbor Freight $6 on sale ones but their so cheap I keep a half a dozen at the house and with any hint of a problem put a new one on . I use these devices on several items and would have to replace about 2 harbor freight ones each year .  Also  with theirs you do not have that nice disconnect that is so great on snowmobiles , mopeds , or motorcycles . I would even like to have one on the cars and may as they can fit the accessory connectors  .  I did expect this to be much more trustworthy but will give it one more chance before I give up . Though at up to $69 retail that's a lot of money to loose for burning up a few penny capacitor if Lorreta at Deltran is correct . She said they will go poof if their is any fluctuation in voltage . Nothing else on that circuit or any others had issues at all . It was just placed in service . I will update after sending in . They did not require it verbally when calling in but I will pay the extra money to have it signed for . It helps since it is the first year not to have to pay the $8 inspection fee . You can smell it is burnt . Frustrating , I hate electronic devices because they do often have such high failure rates .Note : it took three weeks and I had to be home to sign for the one sent back which caused me to spend a whole day watching for Fedx but they replaced the bad unit . I had a surge suppressor on the other one and have since upgraded it to another Monster unit that was a daily deal . I also have gone with a 14 kw Kohler generator with a whole whose surge protector . The electric grid here is going down several times a year and it doesn't look like that is going to turn around anytime soon . With all the sensitive electronics that are becoming necessities it seems like good defense and being ill having no water , heat , toilets etc is too much .