No low battery warning on ST-16

NoCoOutdoorGuys · Jun 15, 2016

I flew the H to 14.4v and there was no low battery indicator onscreen, vibration, or alarm.

Is that on by default? I took it down to 14.3 and still nothing so I landed.

Gyro108 · Jun 15, 2016

Yes its on by default, If it gets to 14.2 and no warning then I would call Yuneec.

DroneClone · Jun 15, 2016

Gyro108 said:
Yes its on by default, If it gets to 14.2 and no warning then I would call Yuneec.

Good testing point! They can vary +/- dependent upon load !

NoCoOutdoorGuys · Jun 15, 2016

Came on at 14.2 on tonight's flight.

Andyzonk · Jun 16, 2016

I think you are pushing your luck taking the battery down to such low levels. Learn to keep an eye on that Battery Voltage and have the 'H' on the Ground at 14.7 Volts - ST16 warning or not. I don't use the Yuneec Charger, I have a modified 'Quick' Charge lead and I always check how many milliamps (mA) it takes to fully charge a used Battery. At 14.7 Volts the battery is at 10% capacity under load (assuming the battery is correctly rated at 5400mA). As soon as the battery is 'off' load it recovers to 14.9 Volts which is 20%. Aim to get your 'H' on the ground at 14.7 Volts. It's easier to put a fresh Battery in the Drone than it is to Locate and then pick up a load of smashed bits.

Gyro108 · Jun 16, 2016

My guess is that they are 6300, they did exactly the same with the Q500 batteries.

JohnL · Jun 16, 2016

Andyzonk said:
It's easier to put a fresh Battery in the Drone than it is to Locate and then pick up a load of smashed bits.

LOL! That's the funniest post I've seen in weeks. Great philosophy there Andy, and a great post overall.

W Scott Leigh · Jun 16, 2016

That would be great if I could buy a fresh batty. Still have only one

glider · Jun 16, 2016

If landing at 14.7, I wouldn't get even close to 15 minutes flight time (mixed flying ~10 mph avg). If the cells are healthy and battery properly maintained (and battery sensor is accurate), there's no reason why it shouldn't be able to land with 14.3 on the ground. That's just a tad under 3.6v per cell which any decent battery will tolerate.

OnTheRopes · Jun 16, 2016

No electrical engineer, but I go with glider's sentiment's. Yuneec set the alarm there for a reason. I wouldn't want to be caught at a mile away at that point admittedly and I do keep an eye on voltage.

Sparkorc · Jun 16, 2016

Looking at the battery test graph that just been carried out the drop of voltage looks very close to 3.6 volts per cell, so I don't think you want to be much lower than 14.4 volts as the drop off is quite severe, and you may damage or shorten the life of the battery, other users may have different views but I always ere on the cautious side.

Battery Test Results