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Old Dec 21, 2015, 04:40 PM
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Can a battery chargers balance capabilities fail?

I have an old Thunder Power charger...It will charge four batteries at a time by separate circuits. More and more, its taking hours to charge and balance a battery. Not just one battery but most any of my batteries I use regularly. Two of the "hard to balance" batteries are brand new 60C 3 cell 2200's. If I only charge without balance, it will top off any battery in less than 30 minutes. Do I need to invest in a new charger?????
BTW: I charge at 1C on all batteries.
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Old Dec 21, 2015, 05:45 PM
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How deep do you discharge the packs?
What voltage are the batteries at before you start a charge?
What are the cell voltages of your packs after your 30min (without balance) charge.

The deeper you discharge a pack, especially below 80%, the farther they may go out of balance.
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Old Dec 21, 2015, 08:11 PM
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I suppose those are good questions but in my case, I fly just nearly every day, 365 days a year. (with that much practice, you'd think I'd be good....but I'm not ) I can assure you I do discharge my packs well below 80%, 80% of its potential useful voltage. But each flight is different and I have several different planes using different voltage/amp batteries. I'm sure I'm just an average user/flyer. I do use High C rated batteries for the planes that I fly really hard, ie: my VisionAire I use a 2200 3 cell 60 C. Other planes use 20 or 30 C batteries. Batteries age varies from new to several years old. I don' think that I abuse my batteries more than the average flyer. But, in past years, I never had a problem balancing so all things being pretty equal, my common denominator is my charger...thus: my question.
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Old Dec 22, 2015, 12:32 PM
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It's certainly possible for the balancing circuitry to fail, and it's also possible for the charging portion to get tired. These chargers use switching regulators which are notoriously hard on the electrolytic capacitors. Those dry up and wear out over time, it's the most common fault I've repaired in anything using a switching regulator.
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Old Dec 22, 2015, 05:12 PM
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Quote:
Originally Posted by eghershey View Post
I have an old Thunder Power charger...It will charge four batteries at a time by separate circuits. More and more, its taking hours to charge and balance a battery. Not just one battery but most any of my batteries I use regularly. Two of the "hard to balance" batteries are brand new 60C 3 cell 2200's. If I only charge without balance, it will top off any battery in less than 30 minutes. Do I need to invest in a new charger?????
BTW: I charge at 1C on all batteries.
IMHO, you've got your money's worth out of that old charger. The new chargers are less likely to damage, or worse, cause a LiPo fire.
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