5 Responses to “Battery Tender 021-0128 Battery Tender Plus 12V Battery Charger”

• By Ron Woodsum on Mar 13, 2010

  It may work – but it doesn’t function if the battery has dropped below 3 volts. there are no instructions on what to do if this happens. I ponder…
  Rating: 1 / 5
• By Tara Wade on Mar 14, 2010

  I bought this partly because I had read recent reviews that it was made in the USA. I am committed to supporting American businesses making quality products in favor of those companies who merely import junk from China to make a fast buck at the expense of our economy and jobs.

  What a disappointment. Surely, we can make battery charges in the United States of America?

  Can’t we?

  What is the world coming to?

  I will update my review in 5 years or when this item stops working. Whichever comes sooner. It’s my guess I’ll be back within 24 months, judging from the usual apalling quality of Chinese products.

  Rating: 3 / 5
• By Manoela Huettel on Mar 14, 2010

  This battery was installed in my car because I don’t drive it very much and we want to make sure the car battery does not die. This is a useful product and was easy to install by a car mechanic.
  Rating: 5 / 5
• By Michael C. Baker on Mar 14, 2010

  My charger stopped working after 4 1/2 months and a few hours of usage. Deltran requires shipping it direct to them, OK $10 I understand that. But you have to include $12.95 for them to inspect and return the unit. $23 and they may not replace it?!! I threw mine in the garbage and went to Wal Mart and bought what I should have got in the first place. The unit that also is a auto shut off trickle charger for $22 verses $46 I paid for the Battery Tender. And I know they will take it back if I have a problem without the hoops. I feel like it is so hard to get quality in the retail market, it wears me out!!
  
  Incidentally I’ve worked with thousands(probably 10′s of thousands) of batteries over 30 years in my industry, these things are no better than the competition. Without a voltage output adjustment you need a different charger for every type battery. So buy one for AGM, another for GEL, another for wet cell”lead acid”, I doubt you’d have a Nickel Cadmium, Nickel Iron, or NiMH for 12volt but they all have different optimum voltages per cell, these charges are set up for only one and mine was to high for the gel it was supposed to be for!
  
  Check with your manufacturer and find out what the full charge voltage for your battery is and take the battery off the charger after charging for awhile, (gets no better than this with these) and either let it sit overnight or load it with a 12v light bulb for 2 minutes to remove what is called gas voltage. Take a reading with a good digital meter, if it is at the full charge voltage, store it in a dry cool place when not being used if you want to get the most life out of it. Check it from time to time if it drops 20% recharge.
  
  Deltran seems to suggest some kind of special maintenance, they at best might help one type of battery. Mine was overcharging and my expensive Harley battery is still sitting at 12.9 volts days later after running to through their cycle, full charge according to Harley is 12.7. This dries out the GEL and shortens the life of the battery. We had thousands of GEL cells go bad very early in industry because of this very same scenario in the early days. We had programable chargers and programmed per cell voltage to .01 of a volt and still had problems.
  
  People who recommend this thing are buying into the hype!!!
  Rating: 1 / 5
• By Paul on Mar 14, 2010

  This charger was recommended to me by a friend. I got it at a better price than my friend did and it’s exactly what I wanted.
  Rating: 5 / 5

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