loose altitude 2 to 4 minutes

[jcmyhope]

My DJI phantom 2 vision, has of late with All updates up to date on receiver and on the copter, calibrated everything, battery at full charge at start up, copter starts fine and fly's around fine for about 2 to 4 minutes and starts to loose altitude, only a little at first, just a dip 2 to 3 feet then regains a little of lost altitude
then drops and goes down to ground. battery charge shows 3 bars plus, then tried it over and over again it takes off but LAZILY like a lack of power, but if i recharge it it again acts good for 2 to 4 minutes and repeats the whole process as i have written above. My mind says battery but charge shows fine 3 bars and charges to 4 bars. what do you guys think ? Battery ? :x Thanks

 

[Double-D]

Sounds like a battery issue and the phantom is initiating auto land.
Do your LED's flash red when this happens?
Check the battery using the software. The 3 cells voltage should be almost identical.

Let us know how you go.

 

[EMCSQUAR]

What are your battery warning levels set at? I've seen a couple after latest update revert to an 11.5 1st warning level it should be 10.8-10.6