
02-04-2004, 03:15 PM
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Registered User
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Join Date: Nov 2003
Location: Hampton Roads, VA
Posts: 58
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Li-Ion
I've been looking for a source of AA sized Li-Ion 3.6v batteries. The guy over at Atmic Mods has them available, but at $19 per cell, I think he's over charging. I've found several other places that carry batteries of the same specs, but they're OEM or sell only to dealers and distributors. I expect these batteries to be expensive, but $19 seems a bit much. Has anyone else found another supplier, or at least a price comparison?
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Rez
a7i20ci7y
Seven Cities RC
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02-04-2004, 08:49 PM
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I Shall Return!
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Join Date: Feb 2003
Location: Chicago
Posts: 203
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hey rez, ill hunt you down some affordable lipoly thats 3.6V and will fit in out xmods...
have no fear mike is here!
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02-04-2004, 10:29 PM
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I have 4.2v lithium cells that'll fit under the xmods body with no modification, not a normal sized cell though(rectangular shaped but very small), put out about 1000 mah, may require a different charger, though. Email me or private message me for details ( i'll beat his price )
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02-04-2004, 10:29 PM
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forgot to say their rechargeable
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02-05-2004, 01:44 PM
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TinyRC Pro
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Join Date: Aug 2003
Posts: 35
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oOoOo...it looks as if robertbyrd is gonna have some competition soon.......
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02-05-2004, 01:49 PM
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Happiness is a warm gun..
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Join Date: Jan 2004
Posts: 103
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Let's see some pics Bob
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02-05-2004, 04:52 PM
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Registered User
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Join Date: Nov 2003
Location: Hampton Roads, VA
Posts: 58
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In the same line as the Li-Ion batteries, does anyone have a low voltage cut off circuit? Running the Li-Ion batteries to less than 20% or so is supposed to damage the batteries, no?
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Rez
a7i20ci7y
Seven Cities RC
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02-05-2004, 05:38 PM
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i can design a chip tha'll shut off at 20% rated voltage using a PIC microcontroller for about $25, just give me some time, i have finals coming up in about a week or two. I'm also working on a charger for the batteries, since there's no charger for a reasonable price.
here is a picture of the 1020 mah cell , puts out about 4.2v
max of 4c ( 4 times rated current ) or 5 amps
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02-05-2004, 05:39 PM
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Whoops, here yah go
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02-05-2004, 06:05 PM
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--PCB smoker--
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Join Date: Dec 2003
Posts: 74
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Quote:
Originally posted by bob256
i can design a chip tha'll shut off at 20% rated voltage using a PIC microcontroller for about $25, just give me some time, i have finals coming up in about a week or two. I'm also working on a charger for the batteries, since there's no charger for a reasonable price.
here is a picture of the 1020 mah cell , puts out about 4.2v
max of 4c ( 4 times rated current ) or 5 amps
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Super sweet, I would jump on that, if the prices are good.
I see the size but could 3 of those fit under the body of a XMod without to crazy of mods.
I know the limits of the stock Microcontroller, so no worries.
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02-05-2004, 07:14 PM
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Hey, i made PRO!!  YAY!!! 
DOUBLE YAAAY!!
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02-05-2004, 07:25 PM
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Here is a battery that might be more suitable if you are planning to try and fit several under the car. it has the same voltage output , just less current , 700 mah( still as good as the RS aaa cells though ) remeber, these batteries NEED SPECIAL RESPECT, you need to watch them while they charge and don't let them get below 20% rated voltage or stay in a hot car or warm area, LITHIUM is the active word in the phrase LITHIUM batteries, it is one of the most reactive element known to man ( seriously, i only think potassium is worse )
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02-05-2004, 10:02 PM
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TinyRC Pro
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Join Date: Aug 2003
Posts: 35
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now the next problem is fittin the li-ion batts, neuro's fet mod and jshwaa's reg mod all under the xmod body
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02-05-2004, 10:59 PM
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--PCB smoker--
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Join Date: Dec 2003
Posts: 74
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Quote:
Originally posted by bob256
Here is a battery that might be more suitable if you are planning to try and fit several under the car. it has the same voltage output , just less current , 700 mah( still as good as the RS aaa cells though ) remeber, these batteries NEED SPECIAL RESPECT, you need to watch them while they charge and don't let them get below 20% rated voltage or stay in a hot car or warm area, LITHIUM is the active word in the phrase LITHIUM batteries, it is one of the most reactive element known to man ( seriously, i only think potassium is worse )
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Those would probably be perfect...........
Yeah unfortunetly they are very delicate and pulling them down to low can kill them.
Nice, very nice.
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02-05-2004, 11:24 PM
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0reZepyT
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Join Date: Feb 2003
Location: Boston, MA
Posts: 804
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what's the highest steady current draw it can safely handle? i remember this site selling li-poly's about the same size as yours and theirs could handle about 2.5 Amps of constant draw, with about 3 to 4 Amps of maximum momentary draw
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