Bests & Worsts Reviews from Amazon

I own several vehicles and motorcycles and I had one of the pre china battery tenders and it lasted for several years. it did so well I bought 3 more of the battery tender pluses at one time at Christmas 2010. one worked for about 9 months and then would not go into the float mode. It killed the battery from overcharging. hooked up the next on a different battery and it worked about 2 weeks before doing the same thing(not going into float mode). the 3rd one lasted less than a week........... each has a 10 year warranty so I phoned deltran and spoke to their "tech". he cannot understand my problem........ tried on different batteries. plugged into outlet first blah ,blah ,blah. I paid over $100.00 for 3 of these Chinese junk chargers. I can send them back and they will check at my cost if nothing is found wrong I would be charged a service fee and return shipping. poor customer service ,bad quality. for what these cost they should last. Do yourself a favor and do NOT buy these battery tender chargers........ Update: 1-15-2014 buy an xtreme charger......I have 3 of the red xtreme charger, see my review ........