battery discharge rate question - batteryholics united

[Jimski]

hello all, this is a question for the somewhat experienced battery enthusiasts...

considering a 4000 mAh / 10.8 V battery has somewhat too much kick for an aeg and will break something (say stock parts)
is there a chance that a 1000mAh battery with the same voltage might be less dangerous, considering it also probably has a much lower discharge rate ?

thanks.

[p0nch3]

If the physics still apply, I don't think changing the mAh will change the discharge rate. A 4000mAh and a 1000 mAh battery still do the same amount of work(Voltage is the same) the mAh is the rating for charge, or battery capacity if I'm not mistaken. So a 4000 would just last longer in the same gun. At least that's what I assumed

[ThunderCactus]

Only in NiMH cells
Your amperage delivered is based on the physical contact inside the cell, so the smaller the volume (sub-c cell versus C cell), the less amperage provided, thus the less torque supplied to the motor and the less ROF

Strictly in technical talk, a 4000mah battery has the same performance as a 1000mah battery, but a 1000mah NiMH is always a mini pack and a 4000mah NiMH is always a large pack, so the difference is in amperage supplied

Why are you looking at a 10.8v large battery? What's your ultimate goal here?

[Jimski]

Why are you looking at a 10.8v large battery? What's your ultimate goal here?

I want crazy trigger response with zero dollars and just two extra cells.
I have designated one of my aegs as a guinea pig victim.
Some pistons will not survive.
You can't stop me.

(I won't use lipo, it goes against my vow of cheapness)

[Comeau-SCS]

But Lipos ARE cheap :P

[Comeau-SCS]

More seriously...

A small lipo around 20-25C rating usally do the job very well. You can find them in rc stores for around 15$.

If you stay in Ni-MH world it is important to know the discharge rate of your battery wich is harder to know most of the times. If you have a 1A 10.4v battery with a 5C rating it is still going to be worse than a 1A battery 9.6v with 10C rating.

In all cases switching connectors to deans (3$) will help a lot also as tamyia are very bad connectors overall and they are not design to handle discharge of more than ~10A.

[ThunderCactus]

vow of cheapness makes you spend $60+ on a NiMH but not $39 on an 11.1v 20C 4900mah battery?
The 11.1v 1200mah 25C batts I use on my PTW are $9 each

Also, without a mosfet you are guaranteed to destroy your trigger contacts.

[Jimski]

no, I spent nothing, I'm adding two cells I had kicking around to a battery that came with the gun.Don't misunderstimatify me.

11.1v 1200mah

so it works

Also, without a mosfet

ok I need to find a free mosfet, or maybe an old piece of dry sausage will do

[ThunderCactus]

A 1000mah lipo will have the same performance as a 6000mah lipo assuming the smaller pack provides 100% of the amperage required by the motor
A mini NiMH pack never provides 100% of the amperage required by the motor, so you'll have around the same performance as a 9.6v large battery.

I'm curious to know, you don't want to buy a new battery, but you're willing to waste $100 of internals by running high voltage?

[Jimski]

but you're willing to waste $100 of internals

you know as well as me that I will waste at the worst a piston, but that was my question here: will it blend ?

[Jimski]

Originally Posted by Comeau-SCS

But Lipos ARE cheap :P

I don't want to buy the charger.

[ThunderCactus]

Worst case you break the back end of your piston off, it jams your gears and the most likely thing to go is usually the spur gear. And at some point you'll melt the trigger.
Half of the gear train failures I've seen are from chunks of piston jamming them up and breaking teeth from the shock of stopping so fast. The other half is from gears just being really shitty lol

[Jimski]

you're so dramatic! are you a gun doctor by chance? ah yes I see lol

this weekend I will tell you what happened.
will
it
blend?

[Mikotech]

You are about to put 2 more subc cells to your pack.
Assuming it is 2 cheap ass subc cell laying around for a while.
The internal resistance of those individual cell will probably be higher that the one of a dog shit and will be the limiting pack performance. That doesn't take in account that the cells and the pack will not have the same balance between cells and the thermal shock your gonna give them while soldering with your probably vow of cheapness soldering iron.

In other words when its gonna be time to charge your pack, please do yourself a favor and don't let your pack chaging without surveillance and monitor the temp. If you can't hold it in your hand, stop charging, dispose safely and environmentaly and do yourself a favor to buy a cheap lipo and lipo charger (under 50$ for both) that gonna be a lot performance wise while still being in the vow of cheapness.

[Jimski]

Assuming it is 2 cheap ass subc cell laying around for a while.

the cell types are the same and they are decent quality packs.

You guys are so dramatic it's funny.I have soldered many battery packs and gun-doctored the shit out of all my guns, I know all that crap.
I'm amused at the amount of serious-consequences bullshit you are spreading, but I totally expected that here

the answer I was looking for was given on post #7

The 11.1v 1200mah 25C batts I use

I might add a few components to deal with the current.Right now I'm fighting with the rear-wiring for the extra cells.Yes they are in a separate pack ( I hope I'm shocking you at least a little bit)

will
it
blend?