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Old Jan 17, 2011, 08:56 AM
emerge is offline
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bad turnigy battery?


Hi all, I own this turnigy 2200mAh 3S 40C battery with a strange cell. Look at the charging process:




starting with a lower voltage it gets full earlier, and it discharges faster than the other two cells, like having one 1000mAh cell and two 2200mAh cells.

Should I throw it or is there any way to get the full capacity?
I have another identical battery from the same order, it had a strange cell until the second charge, and now it's perfect.

thank you!
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Old Jan 17, 2011, 10:15 AM
everydayflyer is offline
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Quote:
Should I throw it or is there any way to get the full capacity?
I have another identical battery from the same order, it had a strange cell until the second charge, and now it's perfect.
Perhaps cycle it a few more times. Since you have already charged it it can not be returned.

Cycling LiPolys is a highly debated issue. Some say it is necessary and beneficial. some say it helps a little, some say it is a waste of time.

I like to do fairly easy cycles on my new LiPolys as over the past 5 years I have seen performance of quality cells improve during the firsdt 25 to 50 cycles if they are not abused from the get go.
Old Jan 17, 2011, 10:22 AM
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Quote:
Originally Posted by everydayflyer View Post
Perhaps cycle it a few more times. Since you have already charged it it can not be returned.

Cycling LiPolys is a highly debated issue. Some say it is necessary and beneficial. some say it helps a little, some say it is a waste of time.

I like to do fairly easy cycles on my new LiPolys as over the past 5 years I have seen performance of quality cells improve during the firsdt 25 to 50 cycles if they are not abused from the get go.
thank you for your answer,

I don't stress my batteries, I use a charger with balancer (accucel 6) and I have very high cut-out voltages (I usually end flight with cell around 3,7v).
What voltage should I reach when discharging the pack?
I don't have nothing to loose (and I already ordered 3 other packs) so I can experiment a bit.
Old Jan 17, 2011, 03:25 PM
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3.7 is a safe discharge level.
Old Jan 17, 2011, 03:55 PM
emerge is offline
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still cycling but the cell goes to 3.0v after about 1000mAh consumption.. it's strange cause this battery is exactly the same size of the other i bought.
anyone had luck with a similar battery? maybe being a 40C should I attach an huge load? this battery has already 3 flights with my 450 that I think consumes about 100w..
Old Jan 25, 2011, 09:00 AM
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guess what is the bad cell:



of course the external package was perfect.. I think this is gonna become a 2s 2200mAh battery
Old Jan 25, 2011, 09:52 AM
rampman is online now
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Frankenstein recycled packs
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Technology saved you from a fire. Gotta love the new chargers.
Good find.
Rick
Old Jan 25, 2011, 10:02 AM
emerge is offline
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say hello to my new 2s battery:



I'll still buy from hobbyking, 1 broken cell is ininfluent compared to the savings I had with them!
Old Jan 25, 2011, 11:21 AM
TreeDiver is offline
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hmmmm...hole in pack

I had it also...but because of small crash and bad meeting with bold

cell removed and pack ended into a 2s pack


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