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Charging question

Old 07-11-2012, 05:16 AM
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jkinosh
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Default Charging question

I have the dynamite Speedpack 1800Mah Ni-MH that came with my sons Torment on the charger right now. I had it set to limit capacity ot 2100 maH and it finished with the message of Capa on the charger, Thunder AC6. Are these packs really that under rated? I just restarted the charge with the capacity cut-off turned off and it put an additional 212 maH into to, for a totla of 2312 maH . Should I just call it charged when it hits the cut-off at 2100? or should I set it higher? Or Lower Don't want to damage the pack. I am charging at 1.8A

What about his lipo, it is a 5000 maH sky lipo 20c 7.2 hardcase, what should I set the cut off at?

Thanks

Jacob
Old 07-11-2012, 07:23 AM
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allelectric
 
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Default RE: Charging question

I fly all electric.... and I would NEVER overcharge my batteries. And my lipo's always go through a break in period. I am not an expert But I believe you probably damaged that pack....
Old 07-11-2012, 07:26 AM
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jkinosh
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Default RE: Charging question

Not sure if it would have damaged the pack or not, the Charger is a Delta Peak charger, so it should shutoff when it is complete, atleast for NiMh packs
Old 07-11-2012, 07:34 AM
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Default RE: Charging question

Agreed charger should shut off. 3.8v per cell for a lipo would be the norm. Again it should stop automatically
Old 07-11-2012, 01:23 PM
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Default RE: Charging question

Your pack is probably not over-rated at all. I'd sooner question the accuracy of the charger's current based on the capacity error (or the additional 212 happened during the peak delay at start and as a result is overcharge) In either case the pack is probably very close to the labeled 1800 mah. The charger should do a nearly perfect job of detecting the full mark especially at the 1.8 rate you chose. Keep doing what you're doing with a max capacity of 2400+ set in the NIMH mode. After a few more charges you may see a new better figure to use.

The lipo should be set the same way (start at 5000 mah) and if it reaches cut-off then increase it to result in a fully charged pack. OR you can just turn it off the first time and then you have your magic number, right? If all of your batts rersult in a capacity that is higher than the label then the current is suspect and can be checked with a DVM or clamp meter.
Old 07-11-2012, 01:53 PM
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Default RE: Charging question

Just to amend my earlier post a full lipo is 4.8v per cell!
Old 07-11-2012, 01:56 PM
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trax de max
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Default RE: Charging question

4.2 per cell goldenduff
Old 07-11-2012, 09:37 PM
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Default RE: Charging question

God dam it! That's what I meant to amend it to! Maybe I shouldn't go to work today!...
Old 07-11-2012, 10:10 PM
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trax de max
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Default RE: Charging question

yea take the rest of the week off, or judging by the weather buy a boat.
Old 07-11-2012, 10:43 PM
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Default RE: Charging question

Cheers! I'm in Aberdeenshire so pretty used to it! Where are you?? I'm still looking in to Rex box power supply...
Old 07-12-2012, 12:48 AM
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trax de max
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Default RE: Charging question

Northumberland, never heard of rex power supply, any good
Old 07-12-2012, 01:10 AM
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Default RE: Charging question

X box - I really shouldn't be at work! (that was actually a predictive text error)
Old 07-12-2012, 02:03 AM
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trax de max
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Default RE: Charging question

cool, I only seen one modded, theres probably more about now. I'll try and find it for some tips for you. I'm sure i bookmarked it on the PC at home.
Old 07-12-2012, 02:11 AM
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Default RE: Charging question

Cheers
Old 07-18-2012, 11:31 PM
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Default RE: Charging question


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