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TB47s going red

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Aug 30, 2019
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Looks like my older TB47s are giving up. On take off, all four cells dip to red. (Fully charged) I've deep cycled with the Angel device, no change.
In another thread might help guess you can't hurt the battery anyway if it don't work now
 
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In another thread might help guess you can't hurt the battery anyway if it don't work now
Much appreciated; They are 4-5 years old so I've gotten a lot of flights out of them.
 
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For deep cycling I levae the battery in the inspire until it shuts down by itself. Then I charge the battery with the slow charger (100w). Then fly that battery till 10-15% and again leave in the inspire until it shuts down by itself. It usually takes about 10-15 min for shutdown from 10% battery level. On the next (the third one) charge and flight I have great flying time. Unfortunatelly for very old and heavy used batteries this will not help much but overal is the best reviving practice I've found.
 
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