Battery Tender 021-1164 10W Solar Charger Reviews

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List Price: $104.95
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The Battery Tender 10W solar panel worked well for 7 months. Now the control unit has apparently failed and the charging LED only flickers occasionally. I was propping the panel against the inside of the windshield of my parked car where it could receive direct sunlight in the afternoon, but even when the sunlight was indirect, the LED charging indicator on the Battery Tender would glow as soon as the sun was fully up in the morning. The car in question doesn't get driven enough to keep its battery from running down, and the solar panel was doing an excellent job of maintaining the battery. I had purchased an adapter cable that plugged into the car's cigarette lighter socket so it wasn't too inconvenient to set up and remove the panel. [Battery Tender Deltran Cigarette Lighter Adapter 081-0069-5]

Previously, I needed to use a battery charger every couple of weeks and now, unfortunately, that chore has returned.

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the "charger" works great to maintain a charged battery for exteded periods of non use but did not work to charge a low battery.

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Not completely happy with the cheap plastic corners which arethe mounting points. However I installed this on my travel trailer where I run 2 batteries anddo allot of dry camping. It keeps my batteries fully charged.

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We ordered this for our RV. The cables are short and we really didn't have anywhere to mount it because we have the RV in a dry storage and are concerned it will get stolen. I wanted to put it on the roof but the cables are only a couple feet long. I will keep it because I may try it on my boat where it would be in a place where the cables will reach.

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I purchased this Solar Battery Charger to maintain the battery in my vehicle while it is not in use for extended periods of time. Nearly all cars have alarm systems and other devices which draw power from the battery on a continuous basis. This current drain can reduce the battery voltage enough to cause Sulfides to form on the plates of the battery. When this happens, the battery is doomed to an early death. The solar charger generates just enough power to counteract the small current drains, and prevent the battery voltage from dropping. I had it connected to a vehicle which was taken out of service for several months. When I switched on the ignition and hit the starter, it was just as strong as if I had used the car yesterday. I'd call that a darn good product! I also shopped around and purchased the power plug (cigarette lighter) adapter, to further simplify connecting the solar charger to my car.