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Old Jan 11, 2013, 01:17 AM
Jim in the Desert
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Gonna charge up some six year old lipos

I got out of the hobby about 5 years ago, but came to my senses and am building up a slow stick. I have about 15 lipos that were about a year old when I got out in 2008. I stored them a few years at half charge in the fridge, but since then they have been in various places. I figured they were goners, but a 800mah enerland just charged up fine on my Thunder Power TP-1010C. A couple of the others are puffy. I'm charging them in the middle of the back yard with the battery in an ammo box (top not sealed but laid loosely on).

How will I know if they are OK? Guess I'll just try them....

BTW, the TP can do CC or CV, but I don't know how to control it. Anybody know? And should I just go with the default CC?

Jim
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Old Jan 11, 2013, 01:26 AM
Proud to eat Kraut ;-)
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Hi!

Charge them slowly and balance them in the beginning. If they are not puffy, check if they still can deliver the current needed for your application.

A normal Lixx charge algorithm is CC/CV, not sure what your chargers functionality is...
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Old Jan 11, 2013, 09:33 AM
Jim in the Desert
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Wow, they seem to be charging up just fine. I always heard over 2 years old, throw them away. This is great if they work. I'll try doing the puffy ones later today when I can watch closely. But I don't know if I should keep them.
Jim
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Old Jan 11, 2013, 09:54 AM
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The puffed ones are prob shot.
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Old Jan 11, 2013, 02:08 PM
Jim in the Desert
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Charging the big puffy one now, a 2200 mah enerland 3S.
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Old Jan 11, 2013, 02:09 PM
Jim in the Desert
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One of the 800mah 3S is not puffy but it has a bunch of blue-greenish-whitish gunk all over the Dean's connector. Is this not a good thing?

Jim
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Old Jan 11, 2013, 02:15 PM
Jim in the Desert
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Quote:
Originally Posted by Julez View Post
Hi!


A normal Lixx charge algorithm is CC/CV, not sure what your chargers functionality is...
Julez, what do you mean by this? Chargers like mine usually do CC then switch to CV? It talks about both but there is no setting in the menu sequence to pick one or the other?

It does say in the manual that in CV mode the amps can ramp down. In CC mode the voltage varies and you can select that, from .25 amps to 125% of 1C.
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Old Jan 11, 2013, 02:31 PM
I hate waiting for parts
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Batteries are cheap, I would dispose of the "big puffy one" and just buy another battery.
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Old Jan 11, 2013, 02:50 PM
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Batteries are cheap, I would dispose of the "big puffy one" and just buy another battery.
Well to some they are cheap, to others who have less money not so much. But in either case they are cheaper then an airplane!
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Old Jan 11, 2013, 03:10 PM
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Perhaps I missed it but do they have balance taps and did you perform a balance charge?
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Old Jan 11, 2013, 03:14 PM
I hate waiting for parts
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Well to some they are cheap, to others who have less money not so much. But in either case they are cheaper then an airplane!
No 6-year old "big puffy battery" is worth the risk of setting one's airplane (or house) on fire. With the proliferation of cheap batteries from overseas dealers, batteries have become more affordable for almost any modeler, regardless of budget.
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Old Jan 11, 2013, 04:11 PM
Jim in the Desert
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Hm, the puffy one acts as though it charged up fine, no fire, but it's scary looking, I'll reap the connectors and toss it and the other puffy one. I'll need to look up how to properly dispose of these. But I hope all the others are OK, I'm kinda scared of them too thought they look fine. Yes, I was balance charging them with the TP-210V balancer.
Jim
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Old Jan 11, 2013, 05:28 PM
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Quote:
Originally Posted by cloud_9 View Post
One of the 800mah 3S is not puffy but it has a bunch of blue-greenish-whitish gunk all over the Dean's connector. Is this not a good thing?

Jim
Sounds like corrosion from moisture and battery voltage; they don't play well together.

I would use them on the ground, not in the air, until you know you get the power you want/need and the run time too.
I would toss the puffy packs.
I would then replace any connector on any pack that survived your testing as any with corrosion will have a short life, maybe cause you to fall out of the sky from an OPEN connection.

Rick
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Old Jan 11, 2013, 05:38 PM
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Car , Truck & tank crashes are usually not in a field of dry burning grass hundreds of feet away with no fire fighting equipment. Swap with some car guys...............Never mind that. They sometimes run those packs hard & below empty.

Save some Aluminum cans for newer batteries.

Good Luck
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Old Jan 12, 2013, 05:29 AM
Jim in the Desert
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Heh, yeah, well it hasn't come to aluminum cans yet thankfully.

Thanks all.

Jim
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