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Old 07-23-2008, 11:40 AM   #1
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Default Always charging?

Hi,

I always see everybody charging batteries at the track, something is always hooked on the charger, is there a benefit to it? I charge my batteries before I get there and have one for each heat, am I missing something?

E
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Old 07-23-2008, 11:52 AM   #2
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Most people don't have a bunch of batteries.
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Old 07-23-2008, 12:01 PM   #3
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oh no they do, they have lots and most of them are serious and have hitech stuff like orion chargers and SHO 4200 orion cells
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Old 07-23-2008, 12:09 PM   #4
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NIMH cells work best and provide the most punch when they are warm off the charger. Lipo doesn't really benefit from this, and in off road you often don't need the extra punch (depending on traction and class.) But that's basically why you see people charging at the track.
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Old 07-23-2008, 01:28 PM   #5
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Running Lipo, I just have one in each car. I rarely take the batteries out, so they do need charged between each round.

One thing to check: are they actually charging? When I run two classes, the easy place for one car to sit while I work on the other is on top of the power supply, next to the chargers. I'll set it charging and when it finishes it just sits there until I either need to charge the other one or need to change/fix/prep it. So it almost always looks like I'm charging something, but probably only am 50% of the time.
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Old 07-23-2008, 02:01 PM   #6
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Quote:
Originally Posted by Ediaz View Post
Hi,

I always see everybody charging batteries at the track, something is always hooked on the charger, is there a benefit to it? I charge my batteries before I get there and have one for each heat, am I missing something?

E
I do the same thing with no issues. If you are good enough and need that exra punch you should peak them at the track. Otherwise just run them and have fun.
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Old 07-23-2008, 05:11 PM   #7
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charging the night before isnt huge issue in offroad. At least if your running 4600's the 4200's had some serious self discharge that would take alot of performance from the pack.
There is a big difference in power from a pack just off the charger to one charged 24hours earlier.
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Old 07-23-2008, 05:30 PM   #8
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I charge mine the night before and get them w/in about 300 mah of peaking, then just peak at the track before I run them.
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Old 07-28-2008, 08:32 PM   #9
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thanks for the replies thats what I suspected,

in a related topic, I just got a new 4200 nimh charged and the power was amazing, the car was popping willies, why did that happen? can I make my other 4200 like that? they are only 3 months old used once a week I just charge, use 5 min and recharge in a week.

thanks
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Old 07-28-2008, 08:51 PM   #10
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I charge mine just because I'm paranoid about my battery running out of juice, and don't see any reason not to do it - my battery's not doing anything while I wait.
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Old 07-28-2008, 09:14 PM   #11
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i charger all mine in the morning before leaving for the track then top them off before each race.

Nimh batteries seem start to lose juice almost immediately after cooling down. so knock the big charge out of the way early...then top em off when needed later that day.
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Old 07-28-2008, 11:24 PM   #12
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Ediaz- It is better for the packs to be discharged each week before you charge them for the next day. Cycling the packs this way will increase pack life and performance and may help get that 3 month old pack back to life. Also was the new pack you got a stick or a matched side by side because that could make a huge difference in the performance.
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Old 07-29-2008, 12:07 AM   #13
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Two things come to mind...

First I think it is sort of a carry over from the days of NiCad batteries.. you did get a benefit from a peak charge....

Second, and probably the real reason is that most of us are just plain lazy.. lol.. We figure we have time and just wait until the last minute...


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Old 07-29-2008, 12:18 AM   #14
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Quote:
Originally Posted by Ediaz View Post
thanks for the replies thats what I suspected,

in a related topic, I just got a new 4200 nimh charged and the power was amazing, the car was popping willies, why did that happen? can I make my other 4200 like that? they are only 3 months old used once a week I just charge, use 5 min and recharge in a week.

thanks
E
A battery discharger will be required to condition and balance the pack before you charge it. But yes you can possibly get your other pack to punch like that.
Fully balancing the pack down with a discharger, you will be able to get a fuller charge out of the old pack.

And what you are seeing is the packs are being repeaked to top off the highest punch possible just before a race heat and to warm them up a bit.
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Old 07-29-2008, 06:38 AM   #15
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I charge the packs I plan to use during practice at home and then repeak at the track . But the packs for mains I charge at the track . Also some guys run 2 or 3 different classes [like me] and you need two chargers going .
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