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Tennessee Fishing Forums
Watercraft
Onboard battery charger question
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<blockquote data-quote="BuckWild" data-source="post: 5605979" data-attributes="member: 217"><p>Just learned an expensive lesson about onboard chargers. Replaced both trolling motor batteries last spring as they were 6 years old and their capacity had diminished quite a bit. I would connect the charger up after using and sometimes leave it connected a week or so. Over the winter I kept it on when it got real cold and just left it on a couple of months. </p><p></p><p>Went fishing this past Monday and the trolling motor lasted 15 minutes. Came back to the house and pulled the boat out, pulled it up to my shed and pulled the batteries out. </p><p></p><p>Both were bone dry, all the water had cooked out of both batteries. Apparently the charger had never floated after charging the batteries. I added distilled water and put them on an external Battery Tender charger and they charged 24 hours and neither battery would read over 9 volts. </p><p></p><p>Two new batteries went in yesterday and a new onboard charger to be added. The old one is a Noco. Probably not going back with that brand. </p><p></p><p>Just throwing it out there...</p></blockquote><p></p>
[QUOTE="BuckWild, post: 5605979, member: 217"] Just learned an expensive lesson about onboard chargers. Replaced both trolling motor batteries last spring as they were 6 years old and their capacity had diminished quite a bit. I would connect the charger up after using and sometimes leave it connected a week or so. Over the winter I kept it on when it got real cold and just left it on a couple of months. Went fishing this past Monday and the trolling motor lasted 15 minutes. Came back to the house and pulled the boat out, pulled it up to my shed and pulled the batteries out. Both were bone dry, all the water had cooked out of both batteries. Apparently the charger had never floated after charging the batteries. I added distilled water and put them on an external Battery Tender charger and they charged 24 hours and neither battery would read over 9 volts. Two new batteries went in yesterday and a new onboard charger to be added. The old one is a Noco. Probably not going back with that brand. Just throwing it out there... [/QUOTE]
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Onboard battery charger question
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