making a 6-7 cell battery pack???

[liquid134]

is it possible? like to buy rechargable AAA cells, solder them in packs, and run them on evo/gen1??? what else needs to be done?? im goin to guess id have to stack fets so i dont blow anything???

[Azngtboi88]

well if you solder them in packs, how are you going to recharge them?

[liquid134]

with a charger?

[RedSXmodder]

well if you solder them in packs, how are you going to recharge them?

There are other chargers on the face of the earth besides the cheapo RS ones. Alot of the better battery packs are built in packs, rather than individual cells.

You won't need to stack anything unless you go above 8 cells. Stock FETs can handle 8.4v at the max. I believe Gen1's are a little less...

Later,
RedSXmodder

[firstimerx]

How many volts is 1 AAA cell ?

[firstimerx]

so aka u can only have 6 cells max on stock Fets ?

[meme405]

use edit button, and putting on more cells after about 7 is kinda pontless. your car is only going to gain a little for all that extra weight....

[xmodsnut]

Here is a little chart to help you figure out how much power you little AAAs have
AAA alkaline batteries= 1.5 volts
any AAA NI-Cd ir NI-MH=1.2 volts
now use that to figure out how much power you are putting in your car
example you put a 6 cell rechargable in you evo
6x1.2=7.2 volts
but if you use alkaline batteries
6x1.5=9 volts
I hope my little chart helps you out.

[liquid134]

well i ended up for now, putting a 2AAA holder (from rs) on my gen1 and my evo. i did the evo first, connected positive to positive and neg to neg, and i went to drive it, with all 6, it barely moved, but i thought it was the tire. turned it off, brought it in, and it started popping. the 2 i added to it, both of the AAA blew. but i unplugged it and everyuthing, and just ran the 4 (on the evo) everything still works luckily. i did my gen1, i did it in series, and works but didnt notice a huge power increase yet....

[xmodmaverick]

wait, so you're saying you tried the 6C on your gen1 first? If so, the gen1's can't handle as much power as the evo's.

[123Vette]

what ru talking a bout a 6th cell? thats not hard at all

[c1v1c]

wait, so you're saying you tried the 6C on your gen1 first? If so, the gen1's can't handle as much power as the evo's.

if ur using alkaline battery it would but if ur using nimh there is no problem at all.

[liquid134]

ok, i wanna do the FET's on my gen1, can i buy the ones from atomic, and then just solder them on the exsisting, or do i have to replace with new stacked fets?

[XmodDad]

well i ended up for now, putting a 2AAA holder (from rs) on my gen1 and my evo. i did the evo first, connected positive to positive and neg to neg, and i went to drive it, with all 6, it barely moved, but i thought it was the tire. turned it off, brought it in, and it started popping. the 2 i added to it, both of the AAA blew. but i unplugged it and everyuthing, and just ran the 4 (on the evo) everything still works luckily. i did my gen1, i did it in series, and works but didnt notice a huge power increase yet....

So you connected the positive to positive, and negative to negative, thats the wrong way to do it for a 6 cell. You need to tie in the extra 2 cells in, in a series circuit, negative to positive, otherwise you mess up the batteries.
The way you described your setup, is kinda like having northbound and southbound highway traffic on the same lane of the freeway, it'll move for a second, but then everything stops and temperatures start to rise.

[liquid134]

ya thats what i figured, ill have to redo the evo. but im still curious on the FET question,......do i have to pull the stock fets off or can i stack right on the board?? and is it worth it?

[XmodDad]

Yes, pull the old fets off first otherwise your just wasting your time and money.

[liquid134]

well i want to do my gen1 and my evo. how many should i stack?

[XmodDad]

Gen1 do a 2x2 stack. on the evo, it really depends on the motor you plan on running.

[BART]

ok, i wanna do the FET's on my gen1, can i buy the ones from atomic, and then just solder them on the exsisting, or do i have to replace with new stacked fets?
You can and should stack them right on top of the existing fets. That is the whole purpose of "stacking" fets. The more fets you stack the more current you are able to flow. Fets have nothing to do with the amount of voltage.

[RedSXmodder]

You can and should stack them right on top of the existing fets.

Wait, wouldn't the stock FET at the bottom fry when its potential is reached, rendering the whole stack useless?

Correct me if I'm wrong, after all, your the electric guru...

Later,
RedSXmodder

[XmodDad]

You are correct RedSXmodder. The stock one, 1792fet on gen1 can handle about 2amps of current, while the 4562 can handle about 7 amps. If you run a high current motor it would fry the stock fet rendering the stack useless. Thats why we remove the stock fets before doing a stack.

[BART]

You are correct RedSXmodder. The stock one, 1792fet on gen1 can handle about 2amps of current, while the 4562 can handle about 7 amps. If you run a high current motor it would fry the stock fet rendering the stack useless. Thats why we remove the stock fets before doing a stack.

This would be true if you were hooking the fets up in series. In parallel the current numbers would be added to each other so a 7 amp stacked onto a 2 amp would yield 9 amps of available current. (I dont know if your numbers are correct but if so this is how it would work).

[RedSXmodder]

I see now, but how do you link it parallel...

sorry if I sound noobish....

Later,
RedSXmodder

[BART]

I see now, but how do you link it parallel...

sorry if I sound noobish....

Later,
RedSXmodder

By stacking them. In series would be if the output of one went into the input of the other (like how the batteries are wired) when you hook base to base, trigger to trigger, and output to output they are in parallel. In other words...each tab on the new fet is soldered to the same tab on the new fet. They are stacked so everything lines up perfectly. And i think you've been here longer than me so your far from noobish;)

[RedSXmodder]

Sweet! Why don't people do that more often. I believe AM doesn't even do that. Thanks Bart, I learned something new today!

Later,
RedSXmodder

[BART]

Sweet! Why don't people do that more often. I believe AM doesn't even do that. Thanks Bart, I learned something new today!

Later,
RedSXmodder

You could even easily and better yet cheaper remove the stock fets from another mod and stack them on top of yours. There are plenty of ways to do upgrades without spending loads of money on parts and shipping. (my battery cap is a good example...cost me 1.19)

[liquid134]

ok so when i get these fets (for both my evo and gen1) imstacking ontop of the stock one??

[BART]

ok so when i get these fets (for both my evo and gen1) imstacking ontop of the stock one??
Thats what I would do...but its your car;)

[meme405]

WOO parralel and series curcuits i know my science...<its the same type of thing like the cicuit types right??

Man too much science in this crap...

[BART]

WOO parralel and series curcuits i know my science...<its the same type of thing like the cicuit types right??

Man too much science in this crap...

and your point is???