The Layman's Dual Cell Mod (tm) - Page 4

MadMicroDoc · #46 01-19-2003, 04:36 PM

Hey ive been wondering ! WHat does BK stand for ??? BKHS perhaps ???

BabyKiller · #47 01-19-2003, 09:50 PM

whast the voltage on this is it higher then a regualar duel cell?

Shanman · #48 01-20-2003, 12:40 AM

Hello there... This message is for Actofgod...

How the heck did you get the laymans Tricell in the space. When I used the All Electronics pack for the 2 cell mod it was fine, but when I tried to get the 3 cells into the original space, I was SOL.

Did you manage to totally clear off the spot weld tabs OR did you put it into something other then a standard Bit Char-g?

My tricell from the original 7.2 Volt 40 mah pack will NOT fit into the space.

Thanks in advance,

Regard, Shanman

BabyKiller · #49 01-20-2003, 08:02 AM

O.o

ive done the math and it shows there are .78v on each battery and if i did my math right this m,od allows 3.12v more then duel cell im i right?

BabyKiller · #50 01-20-2003, 08:02 AM

3.12v, more

MST3KPIMP · #51 01-20-2003, 08:31 AM

http://www.allelectronics.com/cgi-bi...-10&type=store

Heres a 70mah pack I saw.. would these work? Does anyone have any extra cells or is planning on ordering? I'd just like like to try it out w/out paying full shipping and if I could just buy some cells or a pack off someone I'd really appreciate it.

BabyKiller · #52 01-20-2003, 09:25 AM

there bigger heres a comparason 1.75" leads. 2.65" x 0.47" x 0.23". 2.75" leads. 3.65" x 0.64" x 0.27".

BabyKiller · #53 01-20-2003, 11:46 AM

sorry i thought it was a 7.8 not 7.2 volts are atill more than regular duel cell(2.88v)but only 16mah how bad is that will it even run with that?

actofgod · #54 01-20-2003, 04:10 PM

Originally posted by bk2002

After i did this three-cell mod, my forward doesn't work on a couple of motors, it only works on my zz turbo motor. Anyone know the problem???

Originally posted by MadMicroDoc

Hey BK i think i know what ure talking about. After a few runs with my tri i started experiencing the a hesitating and stalling of my car, it would hall @ss and stop all most instantly. it would also looked like it was "swiching gears or sumthing, looked like it kept hitting the turbo ! But its alrite now, maybe the power wire connecting to he pat that puts electricity to the motor is bent out of shape, take a look. but who knows

I haven't had that happen to me, but try MadMicroDoc's suggestion and two other things: first, switch back to a stock cell and see if you still have the problem. If so, it is something in your wiring and not a problem with the new batteries. Maybe a wire came loose during the battery installation. If the problem only happens when the new batteries are in the car, make sure any exposed metal on the batteries is not touching the PCB. If you look at MadMicroDoc's pictures, you'll see he removed the shrink wrap from the three tiny cells. Since they're just a tad bit bigger than the stock cell, it may be touching something on the PCB. Try putting a small piece of clear plastic tape on the underside of the PCB and see if that solves the problem. The fact that it works with at least one of your motors seems strange... sorry I can't be more help, but I'd need to see it in person.

Originally posted by Shanman

How the heck did you get the laymans Tricell in the space. When I used the All Electronics pack for the 2 cell mod it was fine, but when I tried to get the 3 cells into the original space, I was SOL.

Did you manage to totally clear off the spot weld tabs OR did you put it into something other then a standard Bit Char-g?

My tricell from the original 7.2 Volt 40 mah pack will NOT fit into the space.

It is a tight fit, but MadMicroDoc and I have both posted pics of three batteries installed. Yes, I did remove the spot weld tabs; after cutting the metal tab about halfway between the batteries, I used a pair of pliers to remove the remaining metal. If there is still some of the metal tab stuck to the battery, try using a small screwdriver to pry it up so you can grab it with the pliers. When pulling the tab off, it may leave a small raised bump on the surface of the battery; gently flatten it back with a pair of pliers, but don't use too much pressure or you may damage the battery. Also, you have to trim down the sides where the shrink wrapped was superglued together; you may even want to try removing the shrink wrap entirely like MadMicroDoc did, although I got mine to fit with it still on. If you do remove the shrink wrap, use clear tape (see above) so it doesn't touch the PCB. Keep trying.

Originally posted by Babykiller

whast the voltage on this is it higher then a regualar duel cell?

O.o ive done the math and it shows there are .78v on each battery and if i did my math right this m,od allows 3.12v, more then duel cell im i right?

sorry i thought it was a 7.8 not 7.2 volts are atill more than regular duel cell(2.88v)but only 16mah how bad is that will it even run with that?

I'm not sure what calculations you're doing, but there really isn't much math needed. Each cell is 1.2v and 40mAh; wired in series you add the voltages, or wired in parallel you add the capacity (mAh). We are wiring in series, so for each cell add 1.2v; that means dual cell is 2.4v, and tri cell is 3.6v. There are six batteries in the original pack, which is 1.2 x 6 = 7.2v; that's where they got the 7.2v listed on the web site. The capacity stays the same at 40mAh.

Originally posted by MST3KPIMP

http://www.allelectronics.com/cgi-bi...-10&type=store

Heres a 70mah pack I saw.. would these work? Does anyone have any extra cells or is planning on ordering? I'd just like like to try it out w/out paying full shipping and if I could just buy some cells or a pack off someone I'd really appreciate it.

I have one of each type of battery pack that allelectronics.com currently sells. None of them will fit in a stock bit's battery compartment except the very smallest ones that come in the 40mAh pack. If you plan on doing more extensive modification then the other packs might interest you; otherwise, stick with the smallest dimensions so it will fit.

JTM · #55 01-20-2003, 05:18 PM

ok, ive got two standard sized 1/3 AAA batts under my pcb (they stick out a TAD). i can still get a body on it, even an s2k. @ any rate. how big are these 70ma button cells compared to the normal 1/3 aaa batts? would i be able to fit some under the pcb like i have my two standard batts? ive hollowed out all details in my chassis batt compartment so its just a empty box, no bumps or anything.

JTM · #56 01-20-2003, 05:19 PM

like this

BabyKiller · #57 01-20-2003, 05:28 PM

thanks act of god i just ordered those batteries today to do the mod but i have a question how many batteries did u use to make the cell the same size as the stock 4?

BabyKiller · #58 01-20-2003, 05:29 PM

oh and i thought they were .72v each battery i thought it came with ten?

BabyKiller · #59 01-20-2003, 06:40 PM

whats the point of this mod its the same size battery same voltage but less mah so its just a waste of time and money i was charged $6 dollars shipping and handeling i know the batteries are connected buy that little metal piece but i didnt think u took that as 1 battery i took it as 2 so i thought u would pull the metal think off 2 sets of them and face the positive into the negative on the other battery till it met the connecters thus i though i would get the same voltage as 2stock cells in the size of 1

JTM · #60 01-20-2003, 08:25 PM

baby killer, each batt is the same voltage as one normal size, but its like 1/3 the size of a normal cell, so u can fit more batts in there, thus doubleing the voltage (or possibly tripling)