29 replies to this topic

[FrankAR15]

Well my RIS is on its way back from KWA. Happy with the work they did, updating gears too.  

Issue with it not firing was dirty contacts. The tech seems to think a Lipo would be better for long time durability,  Because NiMh can spike at times.

I was thinking of switching to a 9.6v NiMh.

So is NiMh going to put more wear on the electrical system?
Would I be better off running 9.6v over 10.8v electrically wise?

Just rather not switch to Lipo right now.  The 10.8nimh I have is 1500mah from elite airsoft batteries.

[kwaispro727]

As long as you don't put a heavier spring in I would go down the 9.6v.  The 10.8v, 9.6v, and 11.1v Lipo full charged are all pretty close.  Some people's guns can't pull the heavier springs with 9.6v batteries.  Mine is just really slow.

[niko_gpsy]

Even a 9.6v can cause arcing that can lead to trigger contact wear.

[FrankAR15]

So in general are we saying that NiMh will arc more than Lipo? Or will a 9.6v arc less than the 10.8? Or does Lipo arc at all?

Just don't want to run into the same issue. BTW, the contacts were just cleaned to get them working. No damage.

[niko_gpsy]

I was just pointing out that it's not necessarily the high voltage batteries like the 11.1V lipos that can arc in the trigger contacts. As a matter of fact all batteries do, however, batteries with higher voltage are more likely to arc due to it's higher inductive ability.  Amp/current is carried/pushed by the force of voltage therefore as the contacts close and open the tendency for current to "jump" across the closing or opening gap through inductive forces increases.  And over time this can lead to the burning/melting of contact surfaces.

[FrankAR15]

Very informative answer.  I think I may just cut back to the 9.6v and see how it goes.  The rate of fire was only marginally faster with the 10.8 anyway.

[kwaispro727]

There really just isn't a big difference between the three.  They all will be between 12-13v fully charged.  You won't notice the difference unless you really listen for it without a chrono.

[superfrog]

I'll have to disagree here. There is a big difference between the three performance wise.  My gun with 11.1 lipo is substantially faster than my 9.6.

My stock sr7 would feed fine on a 9.6 but it cycled way to fast to feed with my 11.1s.  I couldn't use my lipos until I changed the spring.

The trigger response is very different with the lipo and the flow of bbs on full auto is very different.  As a matter of fact I am trying to find a mosfet that will slow my rate of fire down with my lipo.  My 9.6 will not pull the sp120 spring very well.  And there is a substantial difference on my new gun between my 9.6 and 11.1 lipos with a sp110 madbull spring.

lipo on deans connectors is the way to go.  But a 9,6 on deans is also more than acceptable.

[ga mercs]

i switched to lipos because i had 4 nimhs (3.... 9.6 v and a 10.8) go bad in a month and they were all less than a year old ,,, the rof between a 9.6 vs a 11.1 is night and day,,, and i can buy 3 ---11.1  lipos for what 1 --9.6 nimh nunchuck cost ... i was sceeered of the lipos because of all the fire stories but i figured screw it and bought them and i wish i had done it sooner,,,,, ;;;;;;;;;;;;;;;;;just to get back to your question my buddy has a 10.8 volt 2000mah in his cqb and it is still going strong after 9 months   other than his trigger broke last week and i am putting a new one in today ,,, the trigger contacts in his gun look fine ....... check back in a couple hours and i will chrono a 9.6 a 10.8 and a 11.1 when i get his gun back together

Edited by ga mercs, 09 May 2012 - 01:29 PM.

[niko_gpsy]

kwaispro727, on 09 May 2012 - 12:28 PM, said:

There really just isn't a big difference between the three.  They all will be between 12-13v fully charged.  You won't notice the difference unless you really listen for it without a chrono.

I am trying to understand what you mean when you say all 3 different (9.6, 10.8, 11.1) batteries have no noticeable difference in performance.  

[ga mercs]

ok here is some comparisons ,,,,,just a side note the nimh batteries were charged 9 days ago and have been sitting in a box and the 11.1 1400mah lipo was played with for 4 hours last saturday
gun    kwa cqb......... stock except for a element m115 spring ,,tamiya plugs  378fps w 20gs

9.6v   1600mah     13 rps
10.8v 2000mah     17 rps
7.4v 2000mah 15c   14.5 rps
11.1 1400mah 15c   18.5 rps
11.1 2000mah 15c    23.5 rps

[kwaispro727]

Hmmm interesting.  Before I changed my spring, my 9.6v and my 11.1v were almost exactly the same.  I tried my friends 10.8v and it was all about the same.  I guess it varies for everyones gun.

[ga mercs]

kwaispro727, on 09 May 2012 - 07:00 PM, said:

Hmmm interesting.  Before I changed my spring, my 9.6v and my 11.1v were almost exactly the same.  I tried my friends 10.8v and it was all about the same.  I guess it varies for everyones gun.

i have noticed that the 9.6 fresh of the charger will have a decent rate of fire but fall off quick ,,,,the 10.8 tends to last a little longer than a 9.6  but lets face it after 30 minutes of play it is not fresh off the charger ,,,,,,,i can get the lipos for $10 so if one goes bad so what ,,,,if the nimh goes bad your out $35

Edited by ga mercs, 10 May 2012 - 03:50 AM.

[FrankAR15]

I've played for 4 hours(of course not shooting constantly) and have not noticed any lack of power or drop in ROF with NiMh. Not to say it may lose a couple bb's per sec but nothing noticeable.

I think it's worth mentioning also that not all NiMh are equal. Highly recommend elite airsoft batteries. Cheap and reliable.

Also doing a test on batteries that sat a few days is kind of pointless.(though the time you took and the data is still appreciated) A few hours is ok . You always charge your batteries before a game

Edited by FrankAR15, 10 May 2012 - 05:11 AM.

[niko_gpsy]

FrankAR15, on 10 May 2012 - 05:00 AM, said:

I think it's worth mentioning also that not all NiMh are equal.

You are absolutely correct.

[ga mercs]

i will agree with you there i have nothing against nimh batteries ,,, i have 12 of them but i found the lipos so cheap i just converted over ,,, we have a 2 day game coming up in june maybe i will do some chrono specs on each of the batteries after say 3 mags each and see what the drop in rof is ... my 9.6 v are tenergy ...my 10.8 is an intellect   and the lipos are turnigy nanotechs ,,,,, i think i have some echo 1 9.6 and an airsoft elite i will look ..... i will freshcharge all the batteries and give it another whirl but i got to get my buddy to bring his gun over,,,, i have the same gun but i am running a different spring and deans plus 4mm gold connectors on the ground

[kwaispro727]

ga mercs, how did you manage to put the 3s 1200mah lipo in the crane stock?  I got one on each side and down the buffer tube, but it's pretty tight in the buffer tube and hard to adjust the stock position if needed.  How did you get the middle cell around the wires?

[ga mercs]

i pulled the wire tight with the stock all the way extended and then slide the stock back to were i wanted it .... the ris is my wifes gun so she doesnt do alot of adjusting during the game,,,, it is tight but it works    a 2000mah WILL NOT  fit

[kwaispro727]

Yeah I just picked up two 1200mah lipos.  I just got them today.  The 1400 seemed like it would be a little tight too.

[FrankAR15]

Got my gun back and everything is working great. Tried the 9.6v and it's just not as impressive as the 10.8v.

Almost wondering about just trying the 10.8 again and hoping the same thing doesn't happen.
Maybe the dirty contacts weren't because of the battery?