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-   -   7.2 Volt Battery In TM?!? (https://airsoftcanada.com/showthread.php?t=42603)

WannaBeNoob August 8th, 2007 20:09

7.2 Volt Battery In TM?!?
 
Hey, I have a 7.2 Volt 2200Mah battery and i was wundering, I have a speed charger for it and everything. Would this work in a game if im not worried about ROF at all.

~The Noob

Ronan August 8th, 2007 20:23

Talking in big red letters makes it ideal to make your point.

On a more serious note. I think that the Mah is what changes your RoF. But don't quote me on that.

WannaBeNoob August 8th, 2007 20:24

Mah is bassically 1 mah = 1 shot volts are the ROF

surebet August 8th, 2007 20:49

http://img162.imageshack.us/img162/7...fa1ec6ews4.jpg

ILLusion August 8th, 2007 21:00

It would work fine, given the ROF issue that you're already aware of. But also be aware that the lower voltage will cause the motor to draw more current to turn over the spring.

As an example (these are not actual numbers, this is just for example): if an 8.4v 2200mAh battery required 1mAh to turn over the spring, a 7.2v battery would require 2mAh. On the other end of the spectrum, a 9.6v battery would require 0.75mAh. I recall reading somewhere the draw rate is on a curve, not linear - the motors most efficient voltage is around 8.4v or 9.6v depending on the capacity of the battery pack. The higher voltage push allows the motor to operate without having to pull as much current. At the same time, too much voltage can exceed the motors electrical limitations. Someone more skilled with motors can probably shed more light on that particular issue.

WannaBeNoob August 8th, 2007 21:20

Thank you alot. That helps, so I should be able to fire off "around" 1000 or so BB's? thats ok because I wont be gaming for a while, I'm new and i'll just be target practicing in my backyard. (After consulting neighbours)

surebet August 8th, 2007 21:33

If you live in suburbia, it's a really bad idea to snap shots off in your backyard. Setup a good BB trap in your basement for garanteed privacy, so long as you use curtains.

WannaBeNoob August 8th, 2007 22:04

Small town, no more then 4000 people. know all of my neighbours within a 2 block radius.

surebet August 8th, 2007 22:27

Still, I'd setup a basement range, you never know.

WannaBeNoob August 8th, 2007 22:30

won't be ordering it for a few months. but yea, I'm moving by then so. Currently, no basement then, hopfully it will be "country" land with like 1 neighbour. :) so it should be good by then

pizzainthemorning August 8th, 2007 23:02

Just be careful when/if you upgrade your spring. I could still crank back a PDI 170 with a semi-decent ROF on a 7.2V, but it would jam up occassionally if I stopped the cylce when the spring was 99% cocked.

WannaBeNoob August 8th, 2007 23:12

You have used 7.2 on a TM?

arman August 9th, 2007 05:07

thread jack... my buddy built me a 600 mah 8.4 volt battery. here's the weird thing... i can shoot at least 1000 bbs through it befor i even think about charging it. why???

LUTNIT August 9th, 2007 08:36

Quote:

Originally Posted by WannaBeNoob (Post 515808)
You have used 7.2 on a TM?

The 7.2V 4200mAh pack I used to have gave the same ROF as an 8.4V 2400mAh pack in any of my guns including my 390fps upgraded G36. What I generally found is that 7.2V 4200mAh = 8.4V 2400mAh = 9.6V 1100mAh for ROF purposes.

Quote:

Originally Posted by arman (Post 515901)
thread jack... my buddy built me a 600 mah 8.4 volt battery. here's the weird thing... i can shoot at least 1000 bbs through it befor i even think about charging it. why???

he used good cells...

ILLusion August 9th, 2007 10:16

Quote:

Originally Posted by arman (Post 515901)
thread jack... my buddy built me a 600 mah 8.4 volt battery. here's the weird thing... i can shoot at least 1000 bbs through it befor i even think about charging it. why???

Why not? I can do that with my minis too.

When people use 1 shot per 1mAh, that's just a very very very rough baseline, and is not the rule.


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