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Old 04-23-2007, 08:34 AM   #1201
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Quote:
Originally Posted by UN4RACING
Thanks mine was at 110% so I put it on 90%. Although my 4800s are prefect is it possible this is only with 3200 mah?
So far our intitial testing has not shown any problems with placing it at 110% however this has only been done a couple of cycles. So the full test is yet to be complete. Setting it to 90% fully charges the cells and is the recommended setting until further notice.
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Old 04-23-2007, 10:19 AM   #1202
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Quote:
Originally Posted by MrBlack
I am assuming you are talking about 3200 Orion Lipo's?

Is so you should be charging each cell @ 3.7V and 3200 mAh

If not and you where single cell balancing a 1500mAh cell then you still need the voltage set to 3.7 setting it to 1.7v could cause errors.

Are you checking the voltage with a Volt meter? Voltage checking via chargers is consistant however not 100% accurate.

If cells are out of balance and miss handled then it is possible to see a cell top out at 4.28 this is either the charger miss reading the voltage or the cell being over charged wich is damaging to the cell. Once the cells are belanced they wll not continue to top out at this voltage showing they are healthy once again. For those thinking this is a demon tweak to get more voltage you are sorely mistaken and will only destroy your cells trying to over clock them many times on the first attempt.
Hi MrBlack,

Thanks for the reply.
Yes I am talking about 3200 Lipo. There is a typo error, I set it @3.7V 1500mAh & I am using a volt meter to measure the voltage.

I did a discharged & charged each cell individually @ 3.7V 2000mAh. I got it balanced again, but the final voltage is only 4.1V. Is it normal?
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Old 04-23-2007, 10:26 AM   #1203
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Thanks. So far i dont know why anyone would not use these if they are allowed. No maintainence with more power. Thank you sir can i have another.

Quote:
Originally Posted by MrBlack
The packs are sent roughly 90% charged from the factory depending on the time it took to get to your hobby shop through distribution and how long they were on the shelf this can very.

Your pack appears to close to that 90% charged range and this is why it does not begin charing at 3.2 and yes if you have a proper charger it will begin to ramp down in voltage once is gets close to fully charged.
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Old 04-23-2007, 12:30 PM   #1204
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What's the best price and place to get some of the 3200mah Carbon race specs?
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Old 04-23-2007, 12:40 PM   #1205
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Quote:
Originally Posted by RCLocos
What's the best price and place to get some of the 3200mah Carbon race specs?
I'm thinking Tower hobbies when they have a coupon for $15-$25.00 off on your order.
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Old 04-23-2007, 06:49 PM   #1206
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Default Case problems

Just got my Race Spec 3200. Just dropped in my BK4 and when pulling it out, I noticed that one end of the case is secure while the other (where the connectors are) is not. If I wanted to, I could easily pull these apart. I thought the case was meant to protect the cells?

Is this a design feature? Is it a fluke? Can I CA that end so the case doesn't spit when I pull it out of the BK4?

This experience is not helping me convince my club to allow these after all the heated discussions I had with our members.
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Old 04-23-2007, 07:00 PM   #1207
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Just found a few posts on the split case issue in this thread. Gonna CA it.

The major concern of the "resistance" at our club is safety due to the "watch the lipo's explode" videos that are out there. This split case is probably nothing, however, it does fuel the fire of the nay sayers at my particular club. Hope this manufacturing issue gets the attention it deserves.

The pack looks good otherwise. Can't wait to run it!
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Old 04-23-2007, 08:02 PM   #1208
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I was under the impression that the split case is a design feature. If you glue the halves together you cannot tell if the cells have puffed up and it may prevent the cells from expanding in case of damage.
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Old 04-24-2007, 06:57 AM   #1209
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The case appears to be "attached/glued" on only one of 3 sides. I've CA'ed the second short side, leaving both long seams unglued in case it is as you say.
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Old 04-24-2007, 07:28 AM   #1210
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I got a battery where one side wasnt attached at all. It looks like the case isnt glued. There is just double sided tape on one of the lipo cells that hold the bottom half of the case to it. I just had to squeeze it together and it held fine.
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Old 04-24-2007, 02:45 PM   #1211
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Quote:
Originally Posted by diha
Hi MrBlack,

Thanks for the reply.
Yes I am talking about 3200 Lipo. There is a typo error, I set it @3.7V 1500mAh & I am using a volt meter to measure the voltage.

I did a discharged & charged each cell individually @ 3.7V 2000mAh. I got it balanced again, but the final voltage is only 4.1V. Is it normal?
You should charge each cell at 3.7A @ 3200mAh (not 2000mAh) try this and you should see better results.
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Old 04-24-2007, 02:51 PM   #1212
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Quote:
Originally Posted by or8ital
I got a battery where one side wasnt attached at all. It looks like the case isnt glued. There is just double sided tape on one of the lipo cells that hold the bottom half of the case to it. I just had to squeeze it together and it held fine.
Yes the case is held on by adhesive attached the the cells on the top and the bottom this allows for the cells to expand in case of damage to both alow for safe swelling of the cells and to give a visual sign of cell dmage to the user.

If you glue the case together you lose this feature. On our 4800 the decal used is a soft vinyl which will stretch easily.

Batteries are held in place on all cars with a strap or tap across the top this secures the case and allows it to be an excellent defense against damage from side impact or from being dropped or bent. Also the rounded hollow side allows for energy absorption.

We had an issue during a small production run where the cases where not porperly secured during the application of the adhesive if you have a case that the top or bottom comes loose then you can simply back to us for repair or simply apply a thin layer of good quality double sided tape and press the case back together.
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Old 04-24-2007, 04:21 PM   #1213
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Yeah, we received a few where the bottom half of the case was detached. All we did was press the cases back on and none of them have had any issues . You just have to be careful (!) that you put the case on in the right direction so that it lines up with the notch on the top part.
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Old 04-25-2007, 09:44 AM   #1214
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Quote:
Originally Posted by MrBlack
You should charge each cell at 3.7A @ 3200mAh (not 2000mAh) try this and you should see better results.
Thanks.
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Old 04-25-2007, 01:41 PM   #1215
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Thanks for the explanations for the cases.

I am looking to get a Novak cut-off.
Quote:
SMART-STOP LI-PO CUT-OFF FEATURES AND SPECIFICATIONS

Voltage Range: 2-cell (#5470), 3-cell (#5472), or 4-cell (#5471) Li-Po battery packs

Voltage Cut-Off Point: 6.25 volts (#5470 2-cell); 9.375 volts (#5472 3-cell), 12.5 volts (#5471 4-cell)
Now I am no electrician, but there are 3 cells in the 3200, but I suspect I need the 2-cell smart stop right?
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