i posted this a cross on RCG and i know some don't agree but recently its seems to have been happening more and more
DJI Phantom 3 BATTERY WARNING.
I keep an eye across multiple forums as do many others, recently I have noticed that multiple craft have been lost when it's been flown from a partly charged battery.
The behaviour often tends to be that either the craft with suddenly give battery warnings even though the level still shows fine or the level will suddenly drop massively, the result of this is the craft enters auto landing and this can't be stopped, people have been able to control decent speed and position as you can normally in critical landing but if the craft is our at distance or over water then it's end game.
In some of the worst cases a complete loss of power has happnend and the craft drops like a stone.
The linking factors to most of these has been taking off from below 100% charge, often below 80%.
Simple rule is
DO NOT fly a partly charged pack.
ONLY fly a fresh fully charged battery.
If it was charged over 24 hours before flight I would partly discharge then fully charge again before pushing any distance.
Regularly calibrate you battery, (every 20 cycles)
DJI state to only fly a fully charged battery.
To be clear i am not saying this is a bug or fault but it's a characteristic of the battery's behaviour on both the the Phantom 3 and Inspire 1
Fly safe folks and keep those birds coming home