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Gear / Technical Help => Remote Power => Topic started by: BobW on December 09, 2004, 10:28:27 PM
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Just got a Chun Smart Cahrger from Batteryspace.com for my 12V 4Ah LiMH laptop pack.
I had been charginging it with the wallwart that it came with.
The wallwart got warm, and so did the batteries(ouch). It took 12 hours to full charge and I had to use a light timer to be sure not to overcharge it.
The SmartCharger takes about 3 hours, and turns itself off. Everything stayed cool, charger and especially the batteries.
Heat is the battery killer, especially from the inside out.
Thanks you Dr.Chun ! All You Volts Belong to Me ! ;D
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Just got a Chun Smart Cahrger from Batteryspace.com for my 12V 4Ah LiMH laptop pack.
I had been charginging it with the wallwart that it came with.
The wallwart got warm, and so did the batteries(ouch). It took 12 hours to full charge and I had to use a light timer to be sure not to overcharge it.
The SmartCharger takes about 3 hours, and turns itself off. Everything stayed cool, charger and especially the batteries.
Heat is the battery killer, especially from the inside out.
Thanks you Dr.Chun ! All You Volts Belong to Me ! ;D
nice, i am getting one w/ a couple 9.6v batts off of someone on the board :)
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those smart chargers for the 9.6v packs are VERY nice
i wish the 9v l-ion packs had smart chargers :(
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hey ohm, how long does the chun take to charge the batts im gonna get from ya? just wondering :)
thanks,
bean
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those smart chargers for the 9.6v packs are VERY nice
i wish the 9v l-ion packs had smart chargers :(
They do, they're built into the batteries themselves -- (at least on my walmart-sourced battery)
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but it still takes quite a bit to charge the wal-mart version ime
well i dont really ever run it till its dead, so it doesnt take that long
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all true -- the problem (as I understand it) is that lithium ion batteries are pretty darned finnicky (sp?) about how they're charged, thus I suspect these are charging as fast as they can without damage
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ahh, i didnt know that, thanks for the info ;D
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you guys inspired me to dig up some information to share.
http://www.powerstream.com/li.htm talks about safety and charging.
and this link gives some simple guidelines and more information on the low down of lithium
http://www.batteryuniversity.com/parttwo-34.htm
for example a tip from the site says
"If you have a spare lithium-ion battery, use one to the fullest and keep the other cool by placing it in the refrigerator. Do not freeze the battery. For best results, store the battery at 40% state-of-charge"
A lot of you guys have echoed a lot of this in other threads etc.
Hope this helps everyone in some way and is not too redundant..
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i always kept my valence for my old lappy in the fridge
ive always heard that its best to store them fully charged in the fridge, or 40% in room temp
i noticed a huge difference in the amount of drain occurred in the batt when keeping it in the fridge!
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i always kept my valence for my old lappy in the fridge
ive always heard that its best to store them fully charged in the fridge, or 40% in room temp
i noticed a huge difference in the amount of drain occurred in the batt when keeping it in the fridge!
i do that w/ the AA/AA's that i buy :)
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arent only lithium batts affected like that bean? are you buying lithium batts???
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no, my pholks have been doing that for prolly 20+ years so :)
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hmm, i didnt know that
regular AA's or rechargeable AA's?
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regular ones
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ahh, i dont ahve to buy regular batts. we have a surplus of panasonic industrial batts of all sizes at work 8)
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we also have like 25 6v 7.2ah SLA's that are just sitting, and arent going to be used. im trying to finagle them outta them, but im not counting on it yet
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we also have like 25 6v 7.2ah SLA's that are just sitting, and arent going to be used. im trying to finagle them outta them, but im not counting on it yet
if you can grab a couple, id gladly pay for shipping :)
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what cha need beaner?
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hehe, i was just talkin bout those slas ;D
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hey ohm, how long does the chun take to charge the batts im gonna get from ya? just wondering :)
thanks,
bean
don't know for sure, never fully discharged them and only charged them once.
according to Dr.Chun about 2 and a half hours full.
Also the charger is supposed to prevent memory effect, more important for NiCads, but does affect LiMHs NiMH , too.
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hey ohm, how long does the chun take to charge the batts im gonna get from ya? just wondering :)
thanks,
bean
don't know for sure, never fully discharged them and only charged them once.
according to Dr.Chun about 2 and a half hours full.
Also the charger is supposed to prevent memory effect, more important for NiCads, but does affect LiMHs, too.
dont you mean NIMH batts ???
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hey ohm, how long does the chun take to charge the batts im gonna get from ya? just wondering :)
thanks,
bean
don't know for sure, never fully discharged them and only charged them once.
according to Dr.Chun about 2 and a half hours full.
Also the charger is supposed to prevent memory effect, more important for NiCads, but does affect LiMHs, too.
dont you mean NIMH batts ???
Yup, it's me who needs lithium ;D
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hey ohm, how long does the chun take to charge the batts im gonna get from ya? just wondering :)
thanks,
bean
don't know for sure, never fully discharged them and only charged them once.
according to Dr.Chun about 2 and a half hours full.
Also the charger is supposed to prevent memory effect, more important for NiCads, but does affect LiMHs, too.
dont you mean NIMH batts ???
Yup, it's me who needs lithium ;D
hehe, ok, i see :)