Battery Tender 021-0123 Holiday Review

In the analysis of buying a Tender Jr. vs. a Tender Plus, the main issues are time to full charge, battery size, & parasitic draw. The Tender Plus (1.25) will get the job done twice as fast as the Tender Jr. (0.75). Both now are similar architecturally, save it be the charging power & lack of temperature compensation on the Jr. They both are 4 stage, both have the same sophisticated computer chip technology running the charging process, etc... I spoke to The Deltran(The Manufacturer) customer service department on 3 different occasions, making sure I had the facts right. The first 2 times I was misinformed about the temperature compensation issue. I am editing this review to be accurate as of today's date of 12/01/10. Because The Plus will bring a battery to full charge twice as quickly as The Jr. will, The Plus has a much better chance at overcoming a parasitic draw on your batteries power. Modern cars have sophisticated electronics that require constant power 24/7. Check all your battery connections & your alternator belt!!! If the connections are not clean & tight, clean it with original coca-cola and a rag / brush, make sure they fit snugly. If your alternator belt is too loose it will not charge your battery properly. If you only want to buy one Tender, don't cheap out, buy The Plus if you have the money to do so. If you want to buy 2 or 3 Tenders to make sure all your batteries are fully charged, the Jr. will probably do just fine. I personally alternate The Jr. between 3 different cars, if I had it to do over again, I would buy The Plus instead as I am not a patient person. Both models will turn off in 72 hours automatically if a full charge is not reached, & neither will start charging without at least 3 volts stored in the battery before initiating a charge. If you left your lights on for 4 days like I did, get a jump, & drive your car around for 30 minutes before hooking up any Tender to charge your dead battery. Either of these 2 Battery Tenders are the best in the world, don't bother doing anymore research, I have done it all for you. Buy one or buy both!!! I bought The Plus model a few months ago also... These babies save you $$$, time & frustration!!! Get the 25 foot extension if you want to charge a car that sits in the driveway, it's only $12. You might also want to buy the Cigarette Lighter Apapter to charge cars that have the battery in the trunk, like the BMW E39 models. [...]

Great Product. I needed a way to keep my minivan battery topped off during extended idle time because my electronic rust protection device was draining the battery. This product does the job beautifully! The only trouble that I ran into initially was that the charger would not start charging because my battery voltage had dropped below 3 volts (this is a safety feature built into the unit). Once I got the voltage up above 3 volts (by briefly attaching jumper cables to another vehicle), it charged just fine. It took a few hours initially, but now I keep the battery connected while the vehicle sits in the garage.

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