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Old 02-26-2013, 02:20 PM   #16
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At a ROAR nationals do they still tech battery temp and voltage before you hit the track ?
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Old 04-20-2016, 02:08 PM   #17
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At a ROAR nationals do they still tech battery temp and voltage before you hit the track ?
Yes. 8.40 volts or less and ambient temp or less.
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Old 04-20-2016, 03:55 PM   #18
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Yes there absolutely is a way to drop the IR on lipos.. I have a old 1s pack that is down to .03 ir at 30 amps. Problem is that the people who know aren't telling and most just deny it
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Old 05-02-2016, 10:08 AM   #19
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Just following on from the initial question, at what IR are people ditching old ones for new ones?
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Old 05-02-2016, 10:37 AM   #20
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Originally Posted by Radi0Flyer View Post
I hear driving a nail through them is the "hot" ticket.



Sean
Back in the day before I knew of lipo batteries, I had a PDA (yeah one of those) that was bulging because of the battery inside. So, in order to reduce the swelling I took a hobby knife and "vented" said battery. It worked but Im just lucky the thing didnt burn my house down.
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Old 05-02-2016, 10:56 AM   #21
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I have had luck rejuvenating packs by discharging them down to 3.5v/cell, then putting them in a lipo sack and putting them in the freezer for a day. Take it out, let it come up to room temp and cycle it a couple of times.

This won't bring it back to "like new" condition - but can make it slightly better for a little while.
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Old 05-03-2016, 06:24 PM   #22
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Originally Posted by SpeedySST View Post
Back in the day before I knew of lipo batteries, I had a PDA (yeah one of those) that was bulging because of the battery inside. So, in order to reduce the swelling I took a hobby knife and "vented" said battery. It worked but Im just lucky the thing didnt burn my house down.
I tried that on a bad Lipo I was throwing out anyway. I cut a little hole in the corner and let it vent then sealed it back up. The battery was taking a charge but was still bad. The corner where I had cut got hard and made a bulge. it eventually stopped taking any charge and I couldn't even make a smoke show with it. Bummer.



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