those dewalt batteries.. again.. - RC-Monster Forums

t-maxxracer32 · **those dewalt batteries.. again.. -** 12.07.2006, 07:47 PM

hey would these work?

http://www.sears.com/sr/javasr/produ...seBVCookie=Yes

it sais there nicd so idk really...

lmk! thanks!

o and d they have to be dewalt?

07:57 PM

Quote:

Originally Posted by t-maxxracer32

hey would these work?

http://www.sears.com/sr/javasr/produ...seBVCookie=Yes

it sais there nicd so idk really...

lmk! thanks!

o and d they have to be dewalt?

Sorry these are ni-cad dewalt packs...

You want li-ion packs

*edit*

Like these

http://cgi.ebay.com/DeWALT-DC9360-He...QQcmdZViewItem

Bye:018:

t-maxxracer32 · 12.07.2006, 08:08 PM

ya i thougth so lol o well it was wortha shot... man those are epxeinsive. how many packs can you make outta that? like is i was a 3s pack

BrianG · 12.07.2006, 11:11 PM

Well, there's 10 cells in the pack. The most you could do is a 10s1p or a 5s2p...

t-maxxracer32 · 12.09.2006, 04:29 AM

i can only have 3s in the mamba 5700 though

so waht could i make?

BrianG · 12.09.2006, 04:43 AM

With 10 cells, you have a lot of options. If you want 3s1p, you could make three seperate 3s packs with one cell left over. If you want better runtime, you could make a 3s2p pack. However the weight will obviously be higher with 6 cells vs 3. With the 4 leftover cells, you could still make one 3s1p pack and still even have one cell left over.

t-maxxracer32 · 12.09.2006, 05:15 AM

hmm.. idk.. how much nicer will the 3s1p be compared to lets say a 7 cell ib3800 or the 6 cell radio shak 3300s? thanks!

zeropointbug · 12.09.2006, 05:30 AM

What does that mean? Nicer? They are two different batteries, one is 9.9 volt, 2.3Ah... the other is 8.4 volt 3.8 Ah. One would weight 215 grams (A123's), and the 7 cell weights 455 grams. The 7 cell has more energy capacity of course.

Explain what you mean, you are comparing apples to oranges.

t-maxxracer32 · 12.09.2006, 01:01 PM

i mean performance wise. dont wanna go out and spend 150 and get 3 packs when i can go to radio shack and buy 6. now if these batterys are much better than its a completely different story. i have NO idea how these batterys are compared to the radio shack batteries because ive never seen them run or anything like that. how much more power would these have over the gp3300s? how much of a better runtime would these have?

i think i got some of the pros and cons down...

pros of the dewalt batts
15 min charge time
lotsa power
run time?...
less weight

cons
......

pros of gp3300
cheap..?

cons
less power
less runtime..?
more weight

let me know if im making an idiot of myself... lol thanks for you guys help

zeropointbug · 12.09.2006, 01:38 PM

Well, first, what system will you be powering it with? an maxx?

And yes, the pros and cons are right, if you want to call them that.

peronally, i would rather have one really good pack, than say, two or three 'decent' batteries. The A123's are simply much better, some other benefits:

-ultra durable, both in physical abuse, and performance abuse (shorting, over-charge, over discharge)
-they will last and last if treated only adequate
-again, 15 minute charge time, you can charge them up as soon as you run out

They deliver almost full Ah rating, they have the flattest discharge voltage curve of any battery (very nice), and you also don't have to worry about them getting too hot, or anything, they are fundamentally safe batteries. They will not burn, explode, or be permanently damaged if discharged/charged to quickly.

consider this

Serum · 12.09.2006, 02:04 PM

GP3300's will put out more current than a single P pack of the A123's.

zeropointbug · 12.09.2006, 06:27 PM

GP3300 can give roughly ~80 amps. A single M1 cell delivers 70 amps continuously, and 140 amp bursts. Who wants 2.3 Ah cap? no one, that's why you 2p them up for 4.6 Ah and 140 amps continuous, and 280 amp bursts. Not to mention that the GP's at those amps the efficiency of the cell is much lower.

starscream · 07:22 PM

Quote:

Originally Posted by zeropointbug

GP3300 can give roughly ~80 amps. A single M1 cell delivers 70 amps continuously, and 140 amp bursts. Who wants 2.3 Ah cap? no one, that's why you 2p them up for 4.6 Ah and 140 amps continuous, and 280 amp bursts. Not to mention that the GP's at those amps the efficiency of the cell is much lower.

Jeez, now I feel insignificant as I want to run 2.3Ah ;)
The GP's definetly have an edge in power at higher AMPS.
For example, I can tell the difference between 16xGP2200's and 6xA123's. I'm very conscious of weight and want to get the best performance and still keep my truck ~9lb's. As I've mentioned before, I will be running 8S1P A123's as soon as I get my hands on a new esc.
The A123's are lacking at 6S1P but I am expecting MUCH better perfomance with 8S1P.

zeropointbug · 12.09.2006, 07:23 PM

Yes, well 6 M1 cells can deliver about 1100 watts continuous, and almost 2000 watts bursts, thats 430 grams, much lighter. If you parallel them up you will have much longer runtime, and higher volts under load so higher power.

starscream · 12.09.2006, 07:51 PM

Quote:

Originally Posted by zeropointbug

Yes, well 6 M1 cells can deliver about 1100 watts continuous, and almost 2000 watts bursts, thats 430 grams, much lighter. If you parallel them up you will have much longer runtime, and higher volts under load so higher power.

I like and have invested in the M1 technology but those numbers seem quite a bit inflated. My system isn't demanding anywhere near 1100 watts and these cells (at 1P and the voltage I stated) do not provide the needed power that even the GP2200's at 1P can provide.