Hi, just charged 3s 3300
Flight time was 8.5 when first warning came in, 9 min when red came in and landed.
Battery charge said
3.78, 3.61, 3.73
This is with the settings as suggested. Which settings should I change if you recommend pulling a little more.
1. A fully charged Lipo Battery is a 4.2V/cell, that is 12.6V for a 3S Lipo.<br />
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2. I suggest about 3.6V/cell per cell for first level protection, this is 10.8V for 3S LIPOs. <br />
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3. For second level i suggest to not go lower than 3.3V per cell because you might damage the Lipo pack, for a 3S this is 9.9. <br />
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4. Put around 0.3V Line Loss (0.1Vper cell for new batteries), and do a fly test. After you land, measure again, if the voltage is higher than you wanted, increment with more 0.1V until you find the correct line loss and get the end voltage you want. But if the Lipo is in good condition, your line loss must be around 0.3V for a 3S pack. Usually this is about 0.1 volt per cell with a new Lipo and it will increase in time when the battery will be older. You should check this again after 20-30 cycles.<br />
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5. If the time between first voltage protection and second is to short increase the value at first level protection until you get about 25-30 seconds time.<br />
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Line loss is the difference between voltage of your LIPO when you fly and the Lipo is LOADED (meaning there is a current load on the battery) and the voltage measured when the Lipo is disconnected from your copter, and there is NO LOAD on the LIPO pack. <br />
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There is an alternative way. You can measure the LOADED voltage by strapping the copter to your table and measure the voltage while motors running and stick is at 50%. Be very carefully if you do it this way, propellers can easy cut your fingers off!