Average Reviews:
(More customer reviews)I installed bunches of these for customer's equipment and had the occasional failure. I had 4 left when I stopped selling them and used another product instead.
I have used the remaining ones occasionally for my own uses. I just checked on one charging a car battery for the last couple of months and it was putting out 22.87 volts. that is not a typo!
Another of the 4 is just dead and two others are putting out 15.1 and 14.9 volts. These are all out of the acceptable range for any 12v battery.
These chargers are just as likely to damage your battery as save it.
I have had much better results with Guest 2611A Charge Pro Series Marine Battery Charger (12/24-Volt, 10-Amps 5/5, Double Output)
I would and do warn anyone I run into away from these. A few years ago, the manufacturer replaced 6 of them for me, but I just dumped them at a discount in "new" condition because I didn't want the risk of selling them to customers. I hope others have better luck. If you are just using one in your life, maybe you get lucky, but put a volt meter on it periodically and check because overvoltage will kill your battery. Most batteries should float around 13.2v
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Product Description:
Battery Tender 12 Volt Power Tender Plus Battery Charger is a portable power tender which works at 5 ampere, constant current recharge and maintenance charger. It is fully potted therefore vibration resistant and waterproof. A mounting flange with mounting holes allow for this unit to be mounted on or in the vehicle. 4 stage charging allows all batteries to be fully recharged after use. Short circuit and reverse polarity protected with a 72 hour safety timer.
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