LiPo Batteries in a CM16 Carbine

Shinobi

Shinobi

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Hey Guys! I'm aware there are forums similair to this, but I just wanted to throw out some specific details. I'm getting a CM16 Carbine, in about a month and I of course need a battery or two. I was looking ar NiMH's, but I have found that I can get LiPo's for even cheaper and higher MaH. Firstly, the website. Is HobbyKingz trusted? I've heard there good, but just wanted to check. Now on to the main things! Will this battery be suitable? http://www.hobbyking.co.uk/hobbyking/store/__7312__Rhino_1750mAh_2S_7_4v_20C_Lipoly_Pack.html
I think it should fit, as it fits an MOE on paper. Also, the guns a CM16. Will it hold up to a 7.4 LiPo? It's 20c. I've heard that's the max if you want it to be safe. I've had no previous experience with LiPo's and i've heard there are some drawbacks like discharging. What's that? Also, it has different connectors, though I assume I can just get an adapter. I've briefly looked at chargers, but does anyone know any good ones? This was one of the ones I found: http://www.hobbyking.co.uk/hobbyking/store/__28146__IMAX_B6_Charger_Discharger_1_6_Cells_GENUINE_UK_Warehouse_.html

With no experience with LiPo's would that be alright? Or would it completely screw my battery and whatnot. ANything's I need to change on my gun to make it handle/be LiPo compatiable?

Sorry for the long post, don't answer all the questions if you don't want ;D Thanks,

Shinobi

 
Also, would any changes to the gun be neccesary?

 
Try component shop for all your lipo needs ;)

With lipo's once they start to loose there charge stop using them and charge it! Never fully discharge a lipo as it will be scrap if you do.

 
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Yep that's the key, but don't worry, you will know when it's begging to run down, so can swap it out wayyyy before its at the end point ;)

 
sp00n said:
Yep that's the key, but don't worry, you will know when it's begging to run down, so can swap it out wayyyy before its at the end point ;)
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Ok then, the place I was looking at was abit cheaper. Would the battery and charger I detailed be good? What's this whold '15c 20c 30c' thing :L

 
Yeah your right they are cheaper, and it is your choice, but unless you live in America, you may get stung for import duty etc

The IMAX b6 charger is good, I use one myself, but you will need a power supply for it.

 
The "c" rating is how much current the battery discharge at any one time

 
sp00n said:
Yeah your right they are cheaper, and it is your choice, but unless you live in America, you may get stung for import duty etc

The IMAX b6 charger is good, I use one myself, but you will need a power supply for it.
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The products are from the UK warehouse I believe ;D Power Supply? Mains?

 
Shinobi said:
The products are from the UK warehouse I believe ;D Power Supply? Mains?
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Check the input for the charger, and trust me it needs a 12v dc power supply. Mine came with one that looks like a laptop charger.

Dunno about where hobby king ships from.

 
Sorry I have no idea on that count.

I would have thought that as long as you kept to 7.4v lipo's you should be ok. I have some 25c ones in my mp5k but that's a heavily modified gun (not much standard left inside the gun).

 
sp00n said:
Sorry I have no idea on that count.

I would have thought that as long as you kept to 7.4v lipo's you should be ok. I have some 25c ones in my mp5k but that's a heavily modified gun (not much standard left inside the gun).
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Ok then, 7.4 20c it is then! :D

 
20C is what Component Shop recommend for airsoft use, so I expect it'll be fine.

 
No it shouldn't wear out the mechanical parts quicker - a 7.4V LiPo is around the same voltage the gun was designed for (8.4V) so it will run at about the same speed. Something that may well happen is that the trigger switch contacts may get worn out faster b/c you're typically dealing with a higher current initially than an NiMh battery produces. The minute damage is caused by micro-arcing which vaporises the surface of the metal in tiny pits.

There is some specially designed grease to help prevent this (google trigger contact grease), but as of yet nobody on here has actually tried it so it may be bollocks. Your best bet is to fit a MOSFET to regulate power delivery. That'll save your contacts, protect your LiPo, make your motor & spring last longer, and improve trigger response.

 
Ian_Gere said:
No it shouldn't wear out the mechanical parts quicker - a 7.4V LiPo is around the same voltage the gun was designed for (8.4V) so it will run at about the same speed. Something that may well happen is that the trigger switch contacts may get worn out faster b/c you're typically dealing with a higher current initially than an NiMh battery produces. The minute damage is caused by micro-arcing which vaporises the surface of the metal in tiny pits.

There is some specially designed grease to help prevent this (google trigger contact grease), but as of yet nobody on here has actually tried it so it may be bollocks. Your best bet is to fit a MOSFET to regulate power delivery. That'll save your contacts, protect your LiPo, make your motor & spring last longer, and improve trigger response.
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Alright Mate, i'll be sure to check out MOSFET's ;D

 
Shinobi said:
Alright Mate, i'll be sure to check out MOSFET's ;D
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Hmm, I don't really want to go and disassemble my gun :/ Might stick with NiMH's but there abit more money :/ The website i'd found was a hobby website with like £5 LiPo's (Decent Makes), but no NiMH's. Looks like i'll look for some cheap NiMH's :L Thanks though :D

 
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