Running MaxAmps batteries to under 3.xx voltage?
Dear Maxamps and other MaxAmps battery users,
What voltage would you recommend running the batts to? What voltage have you actually run the batts to and what were your results?
I run all of my batteries according to a timer and have never triggered the low-voltage cut-off yet on my ESCs. When I unplug them, the voltmeter reads 3.70-3.71V and my FMA Cellpro 4S estimates this to be about 80% of capacity used. I'm very satisfied with my flight times so far. My HZ Super Cub gets 40 mins per 2100 pack, my E-flite P-47 gets 14 mins per 2100 pack, and my Twister 4S EDF Jet 800W power setup gets a comfortable 8.3 mins on 4S 4000 packs. However, I've read many other flyers running their Lipos down to 3.5V, and here on the MaxAmps website on the Lipo Care page, it says:
Use a motor speed controller which has auto-cut feature for lithium polymer. Auto-cut should be set at 3.0V per cell. A three-cell pack, therefore, should be set for 9.0V auto-cut, for example.
So is it safe to run it down to 3.0V? What are the results of running it down to 3.0V regularly, versus my 3.71V in terms of long term performance? Is the post-flight measurement inaccurate because it is not under load like it is the final minutes of flight? Everyone at the flying field doesn't believe me so they always come up to me with their voltmeters in-hand to measure my MaxAmps battery after super long flights to see if I killed it ... but they are always shocked to see such a high remaining voltage. Maybe this is just due to the flat voltage dicharge curve of these sweet batteries. I wish I had an onboard monitor to answer my own question but perhaps I could draw on the community's experience instead. : ) Thanks!