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0 How do you guys figure out when to stop flying your quad because the battery is getting to low? If my goggles have a 7.4V 2200mAh at what voltage should I recharge the battery?
Also if I am flying with a 1300 mAh 4s 15.2 V battery when would you guys decide it is time to bring it home?
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65 For KT-210 using 1300mah 4s packs, I set a flight timer on my radio for 4 minutes. At that point I start watching my average cell voltage and I land when the the FC guesses them to be about 3.4v. I have not over discharged my 4s packs, but I have a 3s pack on KT-125 that I landed because there was not enough power to keep the craft aloft. That ruined the pack, so I now figure better safe than sorry!
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2 You have many choices to monitor your battery.
For me at begining was the buzzer with low voltage alarm.
And about batteries if im remeber this correct
at 100% you have 4,2V
if you get to 3,8 you consumed 65% of battery
3,7 is 87% of capacity consumed
3,6 is 97% of capacity consumed
So for me 3,6 is best to stop because you used maximum power without damaging the battery.
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388 I have warning go off around 3.4v. And try to land around 3. 2-3.3V. I found that my high C-rate quickly drops voltage below that. I don't fly on time because sometimes I very aggressively and other times I just cruise.
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16 My craft hovers at about 50% throttle. When it starts to need 60% and it's over 5 mins on the timer, I tend to bring it in.
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24 With a 2s I'd land at about 6.5 - 6.6v, remember though, that voltage sags quickly at high throttle and then rises again. If you can properly
calibrate mAh draw that is the most accurate way gauge how much of the battery's capacity you have used.
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5 24-Jan-2018, 09:03 AM (This post was last modified: 24-Jan-2018, 09:04 AM by xcalibur.) > How do you guys figure out when to stop flying your quad because the battery is getting to low?
1. My onboard buzzer starts beeping. (via FC VBAT - Configured via Betaflight)
2. My Taranis warns me using a voice prompt. (using X4RSB telemetry)
3. The voltage value in my OSD starts flashing.
All 3 are set up to warn me at 3.6v per cell or 14.4v (4S) total. That way, I figured, I've got every scenario covered. Should the quad be to far away to hear and I happen to miss the OSD warning my Taranis will shout out a warning.
I havn't gotten around to calibrating my mAh draw yet, but that would probably be the safer bet.
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72 A properly calibrated current sensor is the best way to answer the 'when should I land?' question.
Once you have used 80% of your battery's capacity, it's time to land. This should leave your battery at a resting voltage of about 3.7V after it has recovered for a few minutes.
It's also a good way to see if a battery is starting to get old. As batteries age, their capacity starts to reduce, so if a battery that could previously deliver 80% of its capacity and recover to 3.7V only recovers to 3.5V, it's time to think about retiring it.