Since the voltage drop off is nonlinear, effectively using the last 10% or 15% when doing filming missions is problematic. I like to be close to Home and headed down before the warning. With 6 batteries in the backpack I don't think I have ever felt I wasted that marginal 10%.
If you are just burning holes in the sky and are close to your landing point then the risks are less.
I find little utility in trying to push things into the 10% or less range. For me it is there for emergency use. YMMV.
What are you using to discharge it? Make sure you're setting it for 4S discharge. Not some other capacity or storage mode or something.At me the discharge stops at 12.8 volts. How do you get to merge to 12.1 volts?
You have the same?If I were looking for another charger I'd be interested in this unit.
Ultra Power - UP120AC DUO AC/DC Charger - 120W [UP120AC DUO] - $99.99 : Ready Made RC LLC, The Leader in All Things FPV, RC, and Beyond
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