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Old 06-04-2007, 11:57 AM   #1336
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Are the cases available separate from Orion? I want to hack up a case for a saddle pack.
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Old 06-04-2007, 12:10 PM   #1337
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Are the cases available separate from Orion? I want to hack up a case for a saddle pack.
As of right now the cases are not available separate.
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Old 06-04-2007, 12:44 PM   #1338
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Why would you set max capacity at 50%? I've been charging at 1C and would like this explained and verified before I start charging at 2C.
If you double the mah setting to get to the charge rate you want then you need to half the max charge so you dont overcharge it. It works for me and others but MrBlack cautions against it.
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Old 06-04-2007, 01:34 PM   #1339
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My charger has a max charge rate of 2.5 will it hurt the battery to be charged at that? I heard that you wasnt supposed to charge it below some amount also, But I dont recall what it was.
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Old 06-04-2007, 01:40 PM   #1340
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Is there any advantage to charging the 3200 at 2C, other than a reduced charge time?
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Old 06-04-2007, 01:42 PM   #1341
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Originally Posted by chris72983 View Post
My charger has a max charge rate of 2.5 will it hurt the battery to be charged at that? I heard that you wasnt supposed to charge it below some amount also, But I dont recall what it was.
This depends on the charger some that charge at this rate will also not charge a battery fully beyond 2500mAh but their are some that will do it no problem but it will just take longer to charge.

I would contact the charger manufacture to get their opinion.
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Old 06-04-2007, 01:44 PM   #1342
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Is there any advantage to charging the 3200 at 2C, other than a reduced charge time?
Nope.
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Old 06-04-2007, 01:45 PM   #1343
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Nope.
He is correct. You can even go back and forth between 1C and 2C without any ill effect.
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Old 06-04-2007, 04:04 PM   #1344
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hey guys.
apart from being light weight do lipo have a voltage advantage over a good ib4200 pack? my local track wont allow lipo in stock or 540 cause they think it will be unfair im trying to convince them that lipo are a cheaper alternative and that they should allow them.
i saw some test showing discharge curves of lipo versus nimh any one know where on is or if i have got my facts wrong?
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Old 06-05-2007, 11:11 AM   #1345
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Quote:
Originally Posted by aus jd 2703 View Post
hey guys.
apart from being light weight do lipo have a voltage advantage over a good ib4200 pack? my local track wont allow lipo in stock or 540 cause they think it will be unfair im trying to convince them that lipo are a cheaper alternative and that they should allow them.
i saw some test showing discharge curves of lipo versus nimh any one know where on is or if i have got my facts wrong?
cheers
Well some people will say that a good 4200 will be an advantage over a LiPo.

2 cell LiPo tops out at 8.4V

6 cell NiMH tops out at 9.6V+

Charge one of each style and show your Track Official the volktage when fully charged this should remove any concern about un fair advantage.

The Discharge curve on a LiPo is much flatter then a NiMH so this is were any advantage comes into play. But then you can argue well LiPo is at a 1000mAh disadvantage.
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Old 06-05-2007, 11:31 AM   #1346
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Originally Posted by MrBlack View Post
This depends on the charger some that charge at this rate will also not charge a battery fully beyond 2500mAh but their are some that will do it no problem but it will just take longer to charge.

I would contact the charger manufacture to get their opinion.
I called thunder power today and they said the charger cut off by voltage not mAh, and the it would be fine to charge a 3200mAh batt. at 2.5 amps on it. Does this sound right to you.
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Old 06-05-2007, 11:35 AM   #1347
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Quote:
Originally Posted by aus jd 2703 View Post
hey guys.
apart from being light weight do lipo have a voltage advantage over a good ib4200 pack? my local track wont allow lipo in stock or 540 cause they think it will be unfair im trying to convince them that lipo are a cheaper alternative and that they should allow them.
i saw some test showing discharge curves of lipo versus nimh any one know where on is or if i have got my facts wrong?
cheers
The only on track advantage is the weight. Often times people who try the LiPo for the first time swear its "faster" or "punchier", and they attribute this to extra voltage. In reality, its much simpler than that...if the car is carrying less weight, it will take off faster.

So if they want to maintain "fairness" (if there is a such thing in R/C), then just have a weight limit. That way, the LiPo and NiMH runners will all have to weigh in at the same thing and all the advantage of lighter weight is removed.

If they still wont allow you to run it, ask them how "fair" it is that some guys have $80 packs with insane numbers while others can only affoard budget packs with crappy numbers. If they still have a problem with you running it, I say find somewhere else to race.
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Old 06-05-2007, 11:37 AM   #1348
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Quote:
Originally Posted by chris72983 View Post
I called thunder power today and they said the charger cut off by voltage not mAh, and the it would be fine to charge a 3200mAh batt. at 2.5 amps on it. Does this sound right to you.
Yes this sounds correct and you should be fine.
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Old 06-05-2007, 11:38 AM   #1349
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Its funny to me that nobody seemed to give a flying fart about "fairness" in the battery department until LiPo came along. I mean, does anybody ever remember tracks making sure that an entire class' batteries had the same numbers? No...

Now all of a sudden, track owners are SOooooOoOooo concerned about fairness. I guess since the issue of safety has pretty much be settled, people have to have something to complain about with LiPo.
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Old 06-05-2007, 11:49 AM   #1350
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I got spanked last week by a guy using a brushed motor and nimh batteries. How unfair!

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