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Home✈️Aircraft🚁HelicopterHelicopter Main Discussion › Slightly puffy battery okay to keep using?
08-19-2013 02:44 AM  7 years ago
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Applegate

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NV

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Slightly puffy battery okay to keep using?
I'd like to know if it's safe to continue to use a pack that puffs slightly after a hard flight, but it goes away after a normal cool down period at ambient temperature. It's a Glacier 3S 2200mAh battery that isn't that old at all (less than 50 cycles) and has never been abused, over discharged, etc. I've been keeping an eye on it and it's been performing very well. The puffiness hasn't gotten any worse and it started doing it very soon after I got it. I probably should have tried to exchange it but, oh well.
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08-19-2013 02:55 AM  7 years ago
kheinink

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peoria az

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I used to beat up my 450 batts hard, they were always puffy and ugly lookin, just run them till they wont go no more, safety third is my motto
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08-19-2013 03:10 AM  7 years ago
skybob

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Park Ridge NJ USA

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Go to Cheaperthendirt.com and buy a used amo box to store them and transport them , you dont want to take chances , fires kill , that goes for non puffed packs too !Team Boobie
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08-19-2013 03:20 AM  7 years ago
GyroFreak

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Orlando Florida ...28N 81W

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In the ammo boxes, drill a couple of 1/4 inch holes to vent. Those boxes seal tight and a battery on fire will gass out a lot, maybe pop the ammo can if it doesn't have pressure release holes..I think about the hereafter. I go somewhere to get something, then wonder what I'm here after ?
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08-19-2013 03:35 AM  7 years ago
kheinink

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peoria az

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that's a good idea, in fact I already have an ammo box in my shed
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08-19-2013 04:51 AM  7 years ago
skybob

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Park Ridge NJ USA

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Everyone in our club use them as an insuranceTeam Boobie
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08-19-2013 06:26 AM  7 years ago
Bouchah

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Willow Spring, N. Carolina USA

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I fly some puffy 6s packs in my 550, 5000 mah. Bought them used that way after I lost a 6 flight old Voltz pack in a crash. I don't fly hard so I figured they would be fine for me. My last time to the field I checked the voltage before putting on the charger, one of the packs had a dead cell, it read zero volts. I put it on the pl8 to see what it said, Replace bad battery is pretty much what it said. I cut the outter shrink off of it and found some sort of corrosion or something inside. I'm considering rethinking my position on using the other puffy packs before I have an dangerous or expensive problem in the air.

Howard
Blade 130x (5)
Trex 550 V2 (18)
Shuttle ZXX
Freya Xspec (20)
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08-19-2013 01:51 PM  7 years ago
Stykz

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Oldham/ England

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puffed packs
I had two brand new pulse 5000mah 6s packs puff in three flights on a goblin 700

I just gave them a salt water grave last week and have just thrown them in the bin
Not worth risking your heli for.
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08-19-2013 02:04 PM  7 years ago
Applegate

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NV

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I had two brand new pulse 5000mah 6s packs puff in three flights on a goblin 700

I just gave them a salt water grave last week and have just thrown them in the bin
How long did you fly those batteries (how many cycles) between the initial puffing and Davey Jone's Locker? Did you seek any recourse with the vendor?
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08-19-2013 03:10 PM  7 years ago
Dr.Ben

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Richmond, VA, USA

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In the old days, any pack that puffed a little was treated like a ticking bomb. Time has shown that this thought is unwarranted. I have several packs that are a little swelled, but they have been that same way for 75+ cycles with no worsening of the swelling, and their IR's are fine. Thus I am not worried about them.
Bone fide puffing where the cells acutely swell a great deal, and it does not go down at all means the pack is ready for a salt water burial.

Ben Minor

PS: The most dangerous puffed packs I know of are ones that are overheated, puffed, and then someone tries to go back and immediately recharge them. Yes, I've seen someone that stupid, and the outcome was what you expect...a fire.
Peak Aircraft/Team Minicopter Team Futaba Team Kontronik USA
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08-19-2013 04:25 PM  7 years ago
Applegate

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NV

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Good to know. Per my iCharger 306B, the IR is fine on that pack. 2-3 Ohm per cell. It just puffs slightly after a hard flight and "recovers" after a normal cool down. I charge all the batteries I'm going to fly at home before hitting the field, so they're never charged back-to-back. I only charge at 1C, too. Storage charge after every flying session.
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08-19-2013 05:18 PM  7 years ago
edwelds

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hartford,ky-usa

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I had the same thing happen to one of my 6 cell 3300mah packs.The #1 cell was almost dead.That cell was the outside cell on the pack.So I unwrapped it and removed the cell.Soldered the neg and black balance wire to the next cell, and presto..a good 5 cell pack.also had to modify the balance plug.Its now one of my best packs.
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08-19-2013 07:01 PM  7 years ago
Shortman

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Portland, Oregon

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Per my iCharger 306B, the IR is fine on that pack. 2-3 Ohm per cell. It just puffs slightly after a hard flight and "recovers" after a normal cool down. I charge all the batteries I'm going to fly at home before hitting the field, so they're never charged back-to-back. I only charge at 1C, too. Storage charge after every flying session.
Completely normal, best prevention is just checking the cell voltage of each cell at full charge and the IR's at a normal room temperature after allowed to sit. If nothing is suspicious you should be fine.
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08-19-2013 08:43 PM  7 years ago
Applegate

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NV

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Completely normal, best prevention is just checking the cell voltage of each cell at full charge and the IR's at a normal room temperature after allowed to sit. If nothing is suspicious you should be fine.
Still, I just have to wonder why one puffs a bit and the other exact same batteries I bought at the same time don't. They've all been treated exactly the same, stored in the same conditions, same type of flying style, etc. One puffs and the others don't.
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