RCCrawler Forums

JohnRobHolmes · 08-25-2009, 09:01 AM

A soldering iron would be better than the gun style with little heat wire. I solder to mine with an 80w with hammerhead tip, but if you leave the heat on them too long it can make them vent. I recommend no more than one second of contact time to each end of the cell.

Cableman · 08-26-2009, 06:53 AM

Whats little heat wire? I have a venom procharger which says it can charge LIFE batts so i guess im good to go? What amperage do you charge them at? Thanks

JohnRobHolmes · 08-26-2009, 07:14 AM

Yes, your charger will work. I generally charge at about 3 amps, but you can pump up to 10a into these cells.

I am not sure what heat wire you are referring to.

JasonC · 08-26-2009, 02:04 PM

Quote:

Originally Posted by JohnRobHolmes

I am not sure what heat wire you are referring to.

In your previous post, you mentioned heat wire.....

Cableman · 08-26-2009, 02:07 PM

Ok thanks! As for the heat wire i guess its just a typo, your post #41 1st sentence. What should you use to join the batteries, bars or like 12awg wire?

JohnRobHolmes · 08-26-2009, 03:59 PM

oh oh. The "gun" style soldering devices use a wire as an element, whereas a typical iron heats up a tip that holds a lot more heat.

12awg or bars work. I prefer bars because they are more solid, but really it doesn't matter.

Siggy · 08-28-2009, 07:37 AM

Hi John,

How many of these, (if you'd recommend over LIPO's), for an MMM + 2200KV?
Thanks.

JohnRobHolmes · 08-28-2009, 07:46 AM

I would run 6s2p at least. 12 cells total, two stick packs.

Siggy · 08-28-2009, 07:59 AM

Thanks for the quick reply. Am I right to say that these packs will be wider/longer than the regular NIMH stick pack? If 2 sticks won't fit, will 6 cells work? Thanks!

JohnRobHolmes · 08-28-2009, 08:13 AM

Yes they will. You are putting the 2200 motor in your tuber? Do you know the top speed?

A stick pack is roughly 205x55x26mm. LIpo is certaly smaller for the same watt/hour, but a123 is safer and easy to fast charge.

Siggy · 08-28-2009, 08:27 AM

Quote:

Originally Posted by JohnRobHolmes

Yes they will. You are putting the 2200 motor in your tuber? Do you know the top speed?

A stick pack is roughly 205x55x26mm. LIpo is certaly smaller for the same watt/hour, but a123 is safer and easy to fast charge.

Yes 2200 on the tuber. Want to find out how fast this can go. May be able to fit 6-8 cells max (unless I take out the seat and driver) as the cell seem to be quite thick. Anyway, will 6 cells in series work ot just go along with 2 x 3s 30C TP Extreme Lipos that I got? Thanks again.

JohnRobHolmes · 08-28-2009, 09:04 AM

what mah are your lipos?

Siggy · 08-28-2009, 09:12 AM

They are just the 2250's. These are the 30C's that does 135A burst. Actually tried the Tamiya a123's and they are pretty decent for 1/10's. Can imagine your a123 be significantly powerful.

JohnRobHolmes · 08-28-2009, 09:24 AM

If you are geared low enough the lipo would be powerful enough. You could use some punch control to keep the amp draw down. You are going to find the handling limits of the vehicle, and structural integrity limits before you hit the limits of the motor setup. You could use a much smaller motor IMO.

Siggy · 08-28-2009, 09:52 AM

Quote:

Originally Posted by JohnRobHolmes

If you are geared low enough the lipo would be powerful enough. You could use some punch control to keep the amp draw down. You are going to find the handling limits of the vehicle, and structural integrity limits before you hit the limits of the motor setup. You could use a much smaller motor IMO.

Thanks for the recommendation. Sure will be watching on the limits and no plans to bash or thrash. Done some preparation/upgrade and hopefully it will hold more than a few minutes. Still wanting you a123's though.

I tried a 6.5T on 3S limit. Ran ok.

engineerjoe · 09-01-2009, 08:25 AM

Just placed an order for some cells. Thanks!!

yukon635 · 09-02-2009, 01:02 AM

Hey John, I dont have any Sub C batteries anymore and cant seem to find anything around here with a C or D size battery to measure/compare to get a visual of what size these are, could you compare their size to a household C or D battery or even a Sub C.

thanks

JohnRobHolmes · 09-02-2009, 06:12 AM

I have none of them here actually. It is larger in diameter than a sub-c, and longer. The measurements of the cell are on my site.

Cableman · 09-02-2009, 03:24 PM

62mm by 27mm which is 2.44" by 1.06"
Im looking to run these in my scx10, im making a battery holder. Using 3 of these would give me 9.9v? charged would have more voltage correct?
Im using my slash xl-5 speed control, wouild i blow it up with these....i forgot how much it can handle. Whats a good low voltage alarm?

JohnRobHolmes · 10-03-2009, 04:03 PM

These cells need to move. Price reduced...

08-28-2009, 07:59 AM	#49
Siggy RCC Addict Join Date: Apr 2008 Location: Singapore Posts: 1,742	Thanks for the quick reply. Am I right to say that these packs will be wider/longer than the regular NIMH stick pack? If 2 sticks won't fit, will 6 cells work? Thanks! Last edited by Siggy; 08-28-2009 at 08:15 AM.

08-28-2009, 09:12 AM	#53
Siggy RCC Addict Join Date: Apr 2008 Location: Singapore Posts: 1,742	They are just the 2250's. These are the 30C's that does 135A burst. Actually tried the Tamiya a123's and they are pretty decent for 1/10's. Can imagine your a123 be significantly powerful. Last edited by Siggy; 08-28-2009 at 09:14 AM.

10-03-2009, 04:03 PM	#60
JohnRobHolmes owner, Holmes Hobbies LLC Join Date: Nov 2004 Location: Volt up! Gear down! Posts: 20,290	These cells need to move. Price reduced... Last edited by JohnRobHolmes; 11-09-2009 at 12:03 PM.

08-25-2009, 09:01 AM	#41
JohnRobHolmes owner, Holmes Hobbies LLC Join Date: Nov 2004 Location: Volt up! Gear down! Posts: 20,290	A soldering iron would be better than the gun style with little heat wire. I solder to mine with an 80w with hammerhead tip, but if you leave the heat on them too long it can make them vent. I recommend no more than one second of contact time to each end of the cell.

08-26-2009, 06:53 AM	#42
Cableman Quarry Creeper Join Date: Jul 2009 Location: Long Island Posts: 347	Whats little heat wire? I have a venom procharger which says it can charge LIFE batts so i guess im good to go? What amperage do you charge them at? Thanks

08-26-2009, 07:14 AM	#43
JohnRobHolmes owner, Holmes Hobbies LLC Join Date: Nov 2004 Location: Volt up! Gear down! Posts: 20,290	Yes, your charger will work. I generally charge at about 3 amps, but you can pump up to 10a into these cells. I am not sure what heat wire you are referring to.

08-26-2009, 02:07 PM	#45
Cableman Quarry Creeper Join Date: Jul 2009 Location: Long Island Posts: 347	Ok thanks! As for the heat wire i guess its just a typo, your post #41 1st sentence. What should you use to join the batteries, bars or like 12awg wire?

08-26-2009, 03:59 PM	#46
JohnRobHolmes owner, Holmes Hobbies LLC Join Date: Nov 2004 Location: Volt up! Gear down! Posts: 20,290	oh oh. The "gun" style soldering devices use a wire as an element, whereas a typical iron heats up a tip that holds a lot more heat. 12awg or bars work. I prefer bars because they are more solid, but really it doesn't matter.

08-28-2009, 07:37 AM	#47
Siggy RCC Addict Join Date: Apr 2008 Location: Singapore Posts: 1,742	Hi John, How many of these, (if you'd recommend over LIPO's), for an MMM + 2200KV? Thanks.

08-28-2009, 07:46 AM	#48
JohnRobHolmes owner, Holmes Hobbies LLC Join Date: Nov 2004 Location: Volt up! Gear down! Posts: 20,290	I would run 6s2p at least. 12 cells total, two stick packs.

08-28-2009, 08:13 AM	#50
JohnRobHolmes owner, Holmes Hobbies LLC Join Date: Nov 2004 Location: Volt up! Gear down! Posts: 20,290	Yes they will. You are putting the 2200 motor in your tuber? Do you know the top speed? A stick pack is roughly 205x55x26mm. LIpo is certaly smaller for the same watt/hour, but a123 is safer and easy to fast charge.

08-28-2009, 09:04 AM	#52
JohnRobHolmes owner, Holmes Hobbies LLC Join Date: Nov 2004 Location: Volt up! Gear down! Posts: 20,290	what mah are your lipos?

08-28-2009, 09:24 AM	#54
JohnRobHolmes owner, Holmes Hobbies LLC Join Date: Nov 2004 Location: Volt up! Gear down! Posts: 20,290	If you are geared low enough the lipo would be powerful enough. You could use some punch control to keep the amp draw down. You are going to find the handling limits of the vehicle, and structural integrity limits before you hit the limits of the motor setup. You could use a much smaller motor IMO.

Sponsored Links

09-01-2009, 08:25 AM	#56
engineerjoe Rock Crawler Join Date: Jan 2006 Location: SUPERMOTO heaven Posts: 695	Just placed an order for some cells. Thanks!!

09-02-2009, 01:02 AM	#57
yukon635 RCC Addict Join Date: Oct 2005 Location: Trussville, AL Posts: 1,762	Hey John, I dont have any Sub C batteries anymore and cant seem to find anything around here with a C or D size battery to measure/compare to get a visual of what size these are, could you compare their size to a household C or D battery or even a Sub C. thanks

09-02-2009, 06:12 AM	#58
JohnRobHolmes owner, Holmes Hobbies LLC Join Date: Nov 2004 Location: Volt up! Gear down! Posts: 20,290	I have none of them here actually. It is larger in diameter than a sub-c, and longer. The measurements of the cell are on my site.

09-02-2009, 03:24 PM	#59
Cableman Quarry Creeper Join Date: Jul 2009 Location: Long Island Posts: 347	62mm by 27mm which is 2.44" by 1.06" Im looking to run these in my scx10, im making a battery holder. Using 3 of these would give me 9.9v? charged would have more voltage correct? Im using my slash xl-5 speed control, wouild i blow it up with these....i forgot how much it can handle. Whats a good low voltage alarm?

RCCrawler Forums

Thread: Cheap a123 cells