20 replies to this topic

[LordElpus]

Not noticed a thread on these.. For the stats they are very small and very cheap. The 1200mAh 15C one is only 54x15mm



http://www.hobbyking.com/hobbyking/store/uh_listCategoriesAndProducts.asp?idCategory=582

[BaggyPants]

It's only a 3.7v though

[LordElpus]

they have solder tabs on, so those of us that are suicidal and have a soldering iron have a 50/50 chance of having a 7.4v 1200mAh 15c stick lipo that is not very big at all. 3.7v 1200mAh cell = 54mm x 15mm. AA battery = 49mm x 15mm. Or we could cause the world to end.

You might even be able to use a working EOtech as a battery box (and run the eotech of one of the cells via the balance lead) for guns that are next to impossible to fit a pack.

Edited by LordElpus, 04 July 2012 - 06:26 PM.

[BaggyPants]

But you can already get quality 7.4v stick lipo batteries that are no bigger than two of those end to end.

[bjorn]

The only advantage this one has is the round tubular shape.

B.

[aznriptide859]

The rating's aren't that good either. 1200mah at 15C only gives 18A of continuous discharge. The Nanotech lipos I have now are 1200mah 25C, which gives me a good 30A of continuous discharge.

[Isamu]

as soon as they make them 7.4v abd 20c, i will be all over them...

[Inari]

Plus, the Turnigy batteries are *suitcase*. The price is indicative of that. They're fine for airsoft's purposes, but for not that much more you can get far better batteries that last a helluva lot longer.

I am not going to pretend to know everything about batteries, because I don't. But, after having very extensive talks with RC lads, here's what I've picked up about Lipo batteries and airsoft:
- Many manufacturers lie; the information printed on the battery is not accurate. You're trusting them that if it says 20C that it is, same for mAh
- You get what you pay for; a cheap battery is a cheap battery. Ever used ###### poor AA batteries? They do the job...just not very well or for very long

There's a brand called Giant Power, and measuring up against Intellect, the Giant Power was decimating it! Literally. Intellect was 7.4v 1800mAh 20C and Giant Power was 7.4v 1500 mAh 15C. The Giant Power lasted longer (lower discharge rate, to be expected), BUT - it provided far better current. RPM had significantly increased over the Intellect...not what you'd expect. Except of course because you have to trust what it says on the tin...so to speak.

If you're looking for good lipo batteries, talk to lads who know what they're talking about in RC. There's lots who think they know stuff and really don't (just like airsoft), but you occasionally meet a lad who's worth their weight in gold. Pick their brains!

[LordElpus]

Actually, it's not worth talking too much to RC types because they need real heavy duty batteries where as we do not. I have used enough airsoft branded lipos to know they are not worth the money, I have varies sizes, capacities and voltages of Turnigy NANO packs and all have served me well. For airsoft purposes, you can't get a better battery for the £

[NeoVeNoM]

That's true.
15c is more than enough, yet still, there are people who think using a 40c lipo on a normal AEG is a good idea... .
As for stock tube batteries, there are even 11.1v types that fit in it.

[LordElpus]

Looking at the dimensions, it looks like the 950mAh ones will fit side by side and may just about fit the SMG AEPs

[RSM]

That's true.
15c is more than enough, yet still, there are people who think using a 40c lipo on a normal AEG is a good idea... .
As for stock tube batteries, there are even 11.1v types that fit in it.

Is there anything really wrong with using a 40c lipo? I always thought that just because the pack could discharge 9001 amps doesn't mean your gun will draw that much.

[uscmCorps]

I've been having to retire some of my older lipo batteries (mostly because they were lent to people who used them till they died). Some were resuscitated. Some were down for the count. Between all the recommendations for Turnigy Nano-Tech batteries, my teammate and I decided to give some a go and found the absolute largest battery we could fit into our AR15 buffer tubes were these ones:
http://www.hobbyking.com/hobbycity/store/__17279__Turnigy_nano_tech_1400mah_2S_15_25C_Lipo_AIRSOFT_Pack.html

1400mah, 7.4V 15-25C. They fit tight but not too tight (you're not cramming it in there, but they're certainly not loose by any means). So far they've been stellar. Great performance and last me for a full day of heavy shooting. I have yet to find a battery that has the same performance, capacity and discharge rate that will fit into an AEG AR15 buffer tube. They're also very inexpensive. Cheap enough to buy 5 or 6 and have spares as back ups. All mine are rewired to female Deans. That said, these types of batteries, being square in cross section may not fit some guns such as in the receiver covers for AKs which tend to prefer cylindrical batteries. If HobbyKing ever gets around to packaging these round cells into 7.4V and 11.1V packs, they'll move these quite quickly in the airsoft community.

As for support weapons, I recommend getting higher end batteries since you're putting them under more constant strain. I like Gens Ace batteries. I have been using 7.4V, 5300mah, 30C Gens Ace batteries in all my SAWs (G&P Mk46, G&P Stoner, etc):
http://www.hobbypartz.com/98p-30c-5300-2s1p.html
They fit perfectly in the stock of the G&P stoner, and in the box mag of the G&P SAWs. We have yet to use one to it's limit during a full day of heavy shooting. It's a beast.

[aznriptide859]

uscmCorps I use a 3S version, but it's the longer 160mm one so I can't retract my stock all the way (though it isn't an issue for my AEG's that use GBBR buffer tubes).

Yes, it is true, a gun will not draw more amps than what's needed; though it's hard to measure that without instruments like an oscilloscope, so most people go for higher amperage batteries anyways just in case the motor draw a lot more than anticipated.

[uscmCorps]

Yeah, on my Ares SR25 which uses a RS buffer rube I can use a crazy long lipo especially when used in conjunction with a Magpul ACS stock. The trouble is most AEGs on the market today (TM, G&P, KA, VFC, KWA, G&G, CA) use AEG specific buffer tubes and as a result have limited internal dimensions in terms of length. In fact, using these 2 cell 1400mah batteries, I still can't collapse the stock completely, but that (for me) isn't a big deal since I always have the stock a couple positions out from the receiver.

[fiddlesticks4220]

Heard some new VFC guns use RS type buffer tubes, maybe there's hope

[adadqgg]

Pretty sure this is just for Polar* so everyone trying to use it in their regular AEG should not get these for obvious reasons.

[NeoVeNoM]

Is there anything really wrong with using a 40c lipo? I always thought that just because the pack could discharge 9001 amps doesn't mean your gun will draw that much.

don't take my word for it, but burned switches tell me otherwise.

[Tacitus]

don't take my word for it, but burned switches tell me otherwise.

RSM is correct. A battery's discharge rate (Amps x C rating) tells you how much current the battery is capable of delivering. The components which draw power (i.e. the motor) will attempt to take as much current as they need, and no more.

Voltage is another matter though. The battery determines the voltage, and will attempt to force that voltage through the system whether the rest of the components can handle it or not. For this reason, increasing battery voltage is your route into high ROF.

The confusion comes from people comparing high discharge batteries (e.g. LiPos) to low discharge batteries (e.g. small NiMHs). With a low discharge battery, often it can't actually supply enough current for the motor to take what it needs, so you have been unwittingly running it underpowered. Then you plug in even just a 2-cell LiPo and the higher discharge rate now means that your motor is able to run at 'full' power, resulting in a performance increase.

Without a MOSFET, burned trigger switches can occur in any gun, although higher electrical power systems will speed up this effect.

[ctres94]

Here is another great option. Shipping is cheaper for those in the US and is free over $50.
http://www.hobbypartz.com/98p-20c-1200-2s1p-2222.html

20C*1.2 Amp hours=24 amps continuous discharge

15C*1.4 Amp hours=21 Amps continuous discharge

Judging by the data the Gens Ace battery should actually be able to supply more amps if the motor requires it, though in my G&P which shoots about 330-340 fps w/ .2g bb's using stock ratio gears and a G&P m140 motor there was no difference in rate of fire between my Gens Ace (the one linked above) and my turnigy which is this one

http://www.hobbyking.com/hobbycity/store/__17283__Turnigy_nano_tech_2000mah_2S_15_25C_Lipo_AIRSOFT_Pack.html

FYI this one can put out 30 amps continuous if you do the calculations, which is more than the Gens Ace. Also, it does fit in my G&P lipo buffer tube but not in my element one. Either way I would not recommend it for a buffer tube setup since it is a very tight fit, when it does fit, and leaves no room for situating your wiring. Right now I have a crane stock so I have the plugs over in one of the side saddles.