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Old 12-16-2004, 10:42 AM   #136
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how much does that charger go for?
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Old 12-16-2004, 12:48 PM   #137
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At the Hong Kong's on-line store around 110 USD

Nick
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Old 12-16-2004, 12:50 PM   #138
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Quote:
Originally posted by nnick
At the Hong Kong's on-line store around 110 USD

Nick
Gotta link? Thanks.
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Old 12-16-2004, 12:52 PM   #139
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Quote:
Originally posted by nnick
At the Hong Kong's on-line store around 110 USD

Nick
wow, where!?! i was told it was like 230+ in HK
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Old 12-16-2004, 01:35 PM   #140
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Quote:
Originally posted by nnick
At the Hong Kong's on-line store around 110 USD

Nick
$140 you mean? Most HK shops sold out their first batch. I got mine from RC Model.
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Old 12-16-2004, 01:41 PM   #141
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Ooups, you are right it's 140USD!! I bought mine for RCModels too.

110USD is the power supply which I also bought it from HK!

Try also www.hobbymania.com.hk

Sorry

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Last edited by nnick; 12-16-2004 at 02:01 PM.
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Old 12-16-2004, 06:32 PM   #142
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Default Re: Re: Cut off temperature

For race, I recommend to set 48~52degree C for GP3300 under 18-25 degrees Celcious ambient.
That seems a bit overcharging, but always show much punch during race.
Atsushi, Karn and Jilles also set 52degree for GP3300 in Thai(Reedy race of Asia).
Temp sensor comes with Cell master is very accurate than any other ones because it is based on the cell' surface temp.
If you check each cell's temperature with Infrared thermometer when charging terminating is closing, You'll see each temperature is not much different.
The difference of temp between each cell is only 0.5~2degree always(if your battery pack has good condition).
I can say that the difference of temperature 0.5~2 degrees C is "nothing". You don't have to be serious about that.

Battery maker always suggest safe charging way(1C charge 45C temp cut etc..), but racers want "result".

In cold ambient, charging is always terminated by Peak cut.
But in hot condition, battery pack gets hot easily, so you should make sure temp sensor always meets on cell's surface. Then you can expect charge terminating by Peak cut or Temp cut (which one reach first).

Ryan







Quote:
Originally posted by Cole Trickle
Hello Ryan

I really appreciate to see a company reprensative talking about charging here - there so many myths and ghost, when it's about charging.

Now, I'm curious about where the above temperatures came from?

Do you have the same numbers, when ambient temperature is around 18-25 degrees celsius?

Also, what about GP cells? I tend to say most people are using GP's...

Thanks.

Last edited by Ryan Lee; 12-16-2004 at 06:38 PM.
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Old 12-16-2004, 06:46 PM   #143
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Default Cut off way

I recommend peak cut always, but under hot condition, capacity limits and temp limit should be set for safety.




Quote:
Originally posted by nnick
In general Ryan, you recommend usign the temp cut off instead of peak detect right?

Why is that?

Nick
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Old 12-16-2004, 08:28 PM   #144
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Hi Ryan

Would you pls to confirm the next batch shippment date to Hong Kong.

Kind Regards
Anthony
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Old 12-16-2004, 09:00 PM   #145
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Default Next batch

Next batch will be started in the middle of Jan.
For exact shipping date, pls contact Mr.Samuel Chiu at International Hobby.

Thanks,


Quote:
Originally posted by G2B Anthony
Hi Ryan

Would you pls to confirm the next batch shippment date to Hong Kong.

Kind Regards
Anthony
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Old 12-16-2004, 09:03 PM   #146
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OK , Thanks for your info.

Anthony
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Old 12-17-2004, 12:58 AM   #147
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Quote:
Originally posted by nnick
Try also www.hobbymania.com.hk
These guys got a crystal clear definition on warranty: They directly claim, that there aint such thing. Once the box is opened, you have to rely on the manufacturer, if any problems occur. But at least, they are honest about it. Take it or leave it.
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Old 12-17-2004, 01:57 PM   #148
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I've got a question about the charger...

It's only capable of discharging at 10 amps and most of the battery threads will tell you that discharging below 20amps isn't any good. I've always been suspicious about why you have to discharge at 20amps or more and I'm curious if Hara and company are just using the 10 amps or if they have another discharger they use.

I love the size / features of the Much More charger and power supply and would seriously consider them if only the 20amp or more myth could be debunked. I don't want to buy a seperate discharger because I could just pick that and a couple of Novak chargers for less.
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Old 12-17-2004, 06:45 PM   #149
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Default Discharging

Many people want to discharge their battery at high rate over 20A, what do they want to see? AVERAGE VOLT.
But I don't think higher average V always means "Punch".
Each cell has different discharging characteristics, so you can't say "same Average V cells mean same charateristics"

If you discharge one battery pack with different dishcharging amp,
you'll see capacity is almost same but average volt changing.
That's why many people want buying high amp dischager.
According to our test, Internel resistance is muchmore reliable.
Lower IR shows always much punch.

Cell master shows very accurate IR.
Low IR means "the voltage recovering speed is very fast"
If two cell's IR are same, that means both has same volt recovering speed.
When I cycle my packs, now I see only capacity and IR.
We doubled the original IR value for showing much differences between each cell.

also I don't have to kill my battery packs with high amp discharging for just seeing "data"

CM's 10A dishcharging never kill your battery, show right capacity and how much punch your pack has with "IR".

If we make CM as 30A discharger, the size will be triple!

Ryan




Quote:
Originally posted by mushu
I've got a question about the charger...

It's only capable of discharging at 10 amps and most of the battery threads will tell you that discharging below 20amps isn't any good. I've always been suspicious about why you have to discharge at 20amps or more and I'm curious if Hara and company are just using the 10 amps or if they have another discharger they use.

I love the size / features of the Much More charger and power supply and would seriously consider them if only the 20amp or more myth could be debunked. I don't want to buy a seperate discharger because I could just pick that and a couple of Novak chargers for less.

Last edited by Ryan Lee; 12-17-2004 at 06:53 PM.
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Old 12-17-2004, 06:51 PM   #150
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Default Re: Discharging

Quote:
Originally posted by Ryan Lee
Many people want to discharge their battery at high rate over 20A, what do they want to see? AVERAGE VOLT.
But I don't think higher average V always means "Punch".
Each cell has different discharging characteristics, so you can't say "same Average V cells mean same charateristics"

If you discharge one battery pack with different dishcharging amp,
you'll see capacity is almost same but average volt changing.
That's why many people want buying high amp dischager.
According to our test, Internel resistance is muchmore reliable.
Lower IR shows always much punch.

Cell master shows very accurate IR.
Low IR means "the voltage recovering speed is very fast"
If two cell's IR are same, that means both has same volt recovering speed.
When I cycle my packs, now I see only capacity and IR.
We doubled the original IR value for showing much differences between each cell.

also I don't have to kill my battery packs with high amp discharging for just seeing "data"

CM's 10A dishcharging never kill your battery, show right capacity and how much punch your pack has with "IR".

If we make CM as 30A discharger, the size will be triple!

Ryan
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