Fred D
lvl.4
Flight distance : 56184 ft
Canada
Offline
|
I have noticed that the "Battery Life %" on two of my 3 TB47 batteries is dropping.
I had issues with voltage drop a while ago, but figured out that if I stopped flying on particialy charged batteries the problem went away, great.
Now, however, I am noticing that the original battery (#1) that came with the I1 and the second one (#2) I purchased from DJI are continually lossing "Life %". I cycle my batteries every 10 charges. I run the batteries down unit the battery shuts off automatically, give it a couple of hours to stablize it's heat to room temp and recharge, these are the two batteries that I had voltage drop off with, the third battery (#3), I purchased from Amazon, is still 100%.
Battery #1 had 2 voltage drop issues and went from 100% to 92% Battery Life. (1 week ago) has been charge 9 times since and is now 88% Battery Life.
Battery #2 had 1 voltage drop issue and went from 100% to 98% Battery life. (1 week ago) has been charged 9 times since and is now 94% Battery Life.
I have my batteries labeled I use them in order and I fly almost every day, the batteries have all been charged and cycled equally, Battery #3 is still 100%
I have checked all the cell voltages and they are: per battery within allowable limits.
I have 2 under voltage warnings in battery #1's records, 1 under voltage warning in battery #2's records, and no warnings in battery #3's records.
Does anyone know what the life expectancy is of these batteries?
I have 80+ flights on them and flight time has not decreased.
Also, at what "Battery Life %" do you guys think a battery should come out of service??
I should note that I drain my batteries by hooking them up to a 24v clearance light bulb from a military vehicle. No I don't know the amp draw, what I do know is it pulls the battery down a little faster then leaving the I1 sit turned on, and I believe easier on my I1. I do this with all three batteries so I don't believe how I pull the batteries down is an issue.
Any info you folks can provide would be appriciated, Thanks in advance.
|
|