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-   -   Li-Ion (http://tinyrc.com/forums/showthread.php?t=18035)

bob256 02-06-2004 12:01 AM

I think the highest the 1200mah can handle is 7 amps continous draw with short spikes to 9 amps, THAT'S PER CELL, though, so if you have 2s2p ( 2 series packs in parrallel with each other) you'll have 14 amps continous with spikes up to 18+ amps, more than enough for a 280 or 300 size motor,plus you'll have 8.4v to the motor.(if you really want to get crazy, a small transformer could step the voltage down even further to 6v and you'd have a TON of amps, probably around 25+)

TypeZer0 02-06-2004 05:53 AM

wow...that's quite a lot for such a small cell. do you have a bunch of these cells and chargers to sell and if so, how much?

Jshwaa 02-07-2004 05:44 PM

www.atomicmods.com
 
The best cells bar-none are the lithium ion cylindricals that RobertByrd sells on his website. They are exactly the same size as AA and are 3.6V 670mAh rated. That power/volume density is unsurpassed. You need 6 AAA rechargeables to do what 2 of these cells do.

Tell him Jshwaa sent you.

bob256 02-07-2004 09:29 PM

Sorry it took so long for me to get back to you, i've been really busy.I'll get some next week , they'll be on ebay , i'll let you know.
they weigh as much as 4 aaa, but put out almost twice the current @8.4v(4.2v per each cell ), better than the 3.6v 670mah aa's, plus you don't have to deform your body( normal aa batteries won't fit under the car without seriously streching the body out of whack, i've tried )

neurokinetik 02-07-2004 09:41 PM

Quote:

Originally posted by bob256
(if you really want to get crazy, a small transformer could step the voltage down even further to 6v and you'd have a TON of amps, probably around 25+)
Actually, there is a problem with that statement... these things are DC. Transformers only work on AC circuits.

bob256 02-07-2004 11:48 PM

Thanks neuro, turns out i need to check my theory again(unfournately:().

and jshwaa,

A) don't knock'em until you try'em
B) Look at the specs,i have the guy beat by voltage, current, size and shape!! PLUS, my batteries weigh the same!!( 47 grams is CLOSE enough to 44 grams )

jeesh, i think most people are smart enogh to know a "celebrity" namedrop doesn't make a product BETTER...

Competition is good for business.....:p :p

bob256 02-08-2004 12:04 AM

PLUS, Robert Byrd's ALREADY stanky rich ( He OWNS a IT business in texas )..........

jeesh, save some for the starving student, please..............

:p :p :p

boxcrash 02-08-2004 09:56 PM

Quote:

Originally posted by bob256

jeesh, save some for the starving student, please..............

:p :p :p

Amen to that.
Some of us are not high on the money horse, I like stuff cheaper, not problem with making a little, but...............well its all good.

bob256 02-11-2004 09:33 PM

Hey guys, good news. I found an inexpensive li-ion charger for 1-2 cells. I'll be able to build a few chargers. email me for more info

boxcrash 02-15-2004 11:41 PM

Quote:

Originally posted by bob256
Hey guys, good news. I found an inexpensive li-ion charger for 1-2 cells. I'll be able to build a few chargers. email me for more info
I sent yo a email.:D

Roadrunner3562 02-20-2004 03:04 PM

Good cheap Li-Ion
 
Hey Rez,
I just purchased 8 of these 3.6V at 1850mAh from ebay for only $32.00 including shipping. If you get any and need a charger. Find a cell phone charger but make sure it is for 3.6v and says "FOR Li-Ion Batteries Only". Rewire it to your battery holder and there you have it. 3.6V Li-Ion batteries and charger. These batteries are great. Last about an hour and gives a lot more power. Be sure to upgrade your fets and put a regulator in so you don't mess up your ESC.

boxcrash 02-20-2004 05:33 PM

Re: Good cheap Li-Ion
 
Quote:

Originally posted by Roadrunner3562
Hey Rez,
I just purchased 8 of these 3.6V at 1850mAh from ebay for only $32.00 including shipping. If you get any and need a charger. Find a cell phone charger but make sure it is for 3.6v and says "FOR Li-Ion Batteries Only". Rewire it to your battery holder and there you have it. 3.6V Li-Ion batteries and charger. These batteries are great. Last about an hour and gives a lot more power. Be sure to upgrade your fets and put a regulator in so you don't mess up your ESC.

Not bad, are they AA size??

Roadrunner3562 02-21-2004 04:48 AM

yes they are AA...

codedat 02-22-2004 07:00 PM

Hey neuro,

Transformers can be used with DC circuits. Check out Digikey thay have a game kit like "Operation" but just one contact pole and handle. It runs on a 9V battery and when the handle touches the pole it shocks you. It uses a small step up tranformer. They sell these to High Schools for electronic class projects. I bought one when I was in High School.

BTW just read post kind of posting late. HEHE :)

eternaldragon 04-23-2004 05:43 PM

i was looking at towerhobbies for some Lithium Ion cells and came across these and was wondering if the xmode could handle them. http://www2.towerhobbies.com/cgi-bin...?&I=LXEZE6&P=7 or http://www2.towerhobbies.com/cgi-bin...?&I=LXEZE5&P=7


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