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Old 01-10-2009, 02:37 PM   #1
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Default Batteries out of hybernation??

I have some gp3300's that have bens sitting in storage for about 2 years...can't remeber how I left them..either fully charged, or fully discharged...either way.....any suggestions as to getting them to take a good charge...how many AMPS to charge them at?
as they are now....they charge about 2 minutes, then my novak millenium says they are fully charged....and they last all of about 25 seconds in my emaxx...
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Old 01-10-2009, 02:40 PM   #2
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cycle the battery pack........
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Old 01-10-2009, 02:44 PM   #3
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I always used to start with a low charging amp and then gradually work the amperage up. I usually started at like 2.5 amps and increased it half an amp every charge, Discharge at 30A if possible.
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Old 01-10-2009, 02:46 PM   #4
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That is what I am doing...just wanted a little re-assurance...have not done anything in RC in about 2-3 years! Thanks!
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Old 01-10-2009, 02:47 PM   #5
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yes alway's start out at low amp..........
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Old 01-10-2009, 03:33 PM   #6
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If you have an equalizer tray, I would use that between each cycle as well.
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Old 01-11-2009, 09:15 AM   #7
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Charge them at 330 ma for 15 hrs with a charger that doesn't shut off. The rate and time doesn't have to be exact, but the product when multipling them together should equal 150% of capacity. (like 300 ma 16.5 hrs= 4950)
(or 400 ma x 12.375 hrs = 4950)

Battery will be full, balanced and ready for use. Use normally.
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Old 01-11-2009, 01:38 PM   #8
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I don't think you'll have much of a problem getting those back to life. If they were 4200's, R.I.P.
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Old 01-11-2009, 04:12 PM   #9
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Quote:
Originally Posted by Warhawk 1 View Post
I don't think you'll have much of a problem getting those back to life. If they were 4200's, R.I.P.
Yea my 4200's I left in hibernation during baseball season and when I went to go cycle them they took full charge but I had absolutely no power on the track. But I did the same with my 3300's and had no problem whatsoever.
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Old 01-11-2009, 06:01 PM   #10
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Quote:
Originally Posted by gulio View Post
Charge them at 330 ma for 15 hrs with a charger that doesn't shut off. The rate and time doesn't have to be exact, but the product when multipling them together should equal 150% of capacity. (like 300 ma 16.5 hrs= 4950)
(or 400 ma x 12.375 hrs = 4950)

Battery will be full, balanced and ready for use. Use normally.
Batt restoration for long term storage I saw called for 16hrs at 0.1C charge, 1hr rest, 0.2C discharge, rest again and another 16hr 0.1C charge.
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