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Old 03-24-2007, 12:31 AM   #1
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Default 4200ib batteries

how long does it take to charge a 4200ib battery at 6 amps?can anyone help me pls?
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Old 03-24-2007, 12:35 AM   #2
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42 minutes for me.
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Old 03-24-2007, 12:38 AM   #3
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what charger do you guys use?
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Old 03-24-2007, 12:41 AM   #4
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Orion Advantage.
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Old 03-24-2007, 12:53 AM   #5
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Around 40-45 mins is the normal time for a 4200 pack
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Old 03-24-2007, 01:44 AM   #6
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42 mins on the ice for me
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Old 03-24-2007, 02:18 AM   #7
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44 to 46 min to charge and 6 min to race they should make some 2500 packs with the power of the 42wc. so that way they chrage faster for us racers.
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Old 03-24-2007, 05:58 AM   #8
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aroun 45mins @ 6A on a CTX for me
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Old 03-24-2007, 12:11 PM   #9
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Yes around 45 mins !
Japan Yokomo end of March onsale IB4200 WCE ( World Champion Edition ) +0.005V
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Old 03-24-2007, 03:53 PM   #10
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IB4200WCE

Photo from YOKOMO
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Old 03-25-2007, 12:02 PM   #11
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You can calculate it if you know the capacity

e.g. if you have to put in 4200 mAH,

4200 mAH = 4.2AH

4.2AH / 6.0A = 0.7HR x 60 min/HR = 42 minutes

Just take mAH / 1000 / Amps charge rate x 60 min/hr and you get how many minutes it takes to recharge. Of course after you charge a few you already know if you pay attention, however it helps to know if you need to peak at a different amp rate and need to calculate when to put it on the charger to make it peak right before the race.
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Old 03-25-2007, 12:05 PM   #12
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Quote:
Originally Posted by yeaklet4
44 to 46 min to charge and 6 min to race they should make some 2500 packs with the power of the 42wc. so that way they chrage faster for us racers.
I think they do have a battery that is like that, takes less time to charge and no need to discharge first. I think they calll them LIPO?
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Old 03-26-2007, 03:40 AM   #13
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Hi:
sorry for hijacking the thread, but as it is about the IB4200... I recently bought 10 loose cells, and once soldered, I realise that one pack has 2 bad cells... if you push them lower than 10A they seems to work OK, however, you put more than that and the pack suddently fell to 4.0 v (I'm using 5 cell packs)... and this is only on the third charge/discharge cycle... the other pack works perfectly OK... has anyone had this problem before? How can I solve it? I've tried to tray the pack and charge individually the cells but these two cells always do that... I bought the cells on precisionrc, do you think I can claim warranty or something like that?

thanks
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Old 03-26-2007, 02:04 PM   #14
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Quote:
Originally Posted by rampal
Hi:
sorry for hijacking the thread, but as it is about the IB4200... I recently bought 10 loose cells, and once soldered, I realise that one pack has 2 bad cells... if you push them lower than 10A they seems to work OK, however, you put more than that and the pack suddently fell to 4.0 v (I'm using 5 cell packs)... and this is only on the third charge/discharge cycle... the other pack works perfectly OK... has anyone had this problem before? How can I solve it? I've tried to tray the pack and charge individually the cells but these two cells always do that... I bought the cells on precisionrc, do you think I can claim warranty or something like that?

thanks
This is pretty common with IB4200 cells. There are a lot of threads around RC Tech about this and related issues. It's a bit of the price to be paid for working with the loose/unmatched cells as they may or may not have been thoroughly tested. That said, even packs matched by good matchers fail frequently. The IB4200 is a very high voltage, but less stable cell and there are a lot of pitfalls. It's a love/hate relationship for most people.
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Old 03-26-2007, 03:09 PM   #15
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the one the only gfx
oh and 42 min about
and when you buy cells take a volt meter with you and if your not aloud to check the cells dont buy them.
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