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Thread: How HOT does your Battery Tender get?

  1. 04-28-2017, 02:20 PM #1
    Mrzoop
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    How HOT does your Battery Tender get?

    I always keep my non-driver cars on a battery tender. I use a few Beltran units. The other day I needed to move the charging unit to a new location while it was in red charge mode. IT WAS HOT! Like really hot. Then it later cooled off when it went to green mode. I switched the units around for a test. The replaced unit also got quite hot. This does not happen on my single battery water cooled cars. So I wonder if the twin batteries might have something to do with it??
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  2. 04-28-2017, 03:35 PM #2
    Maeter
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    On my twin battery cars, I have been told to use one terminal on one and the opposite terminal on the other. I have also wired a permanent charger through the starter solenoid and a regular engine earth on my dual battery British cars as they are very unaccessible. I only use Ctek chargers and none of them have ever been more than just warm.
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  3. 04-28-2017, 04:29 PM #3
    raspritz
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    If your batter tender is getting hot you need to change something in your system immediately. The most likely causes are a) something is hooked up incorrectly; b) something is wrong with your battery or batteries; c) something is wrong with your battery tender (unlikely given that you swapped units and they both behaved the same); or 4) the battery tender(s) you are using are too small for the load (possible if you have two full-size 12V batteries or if there is a fault in the system that is causing a large drain).
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