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Old 01-29-2014, 06:27 PM
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What are lipos?

Hey guys I have been wondering for awhile as to what the differences of lipo batteries are and what one needs to use them? thanks everyone for your time and effort in helping me to expand my airsoft knowledge
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Old 01-29-2014, 06:57 PM
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Lithium ion polymer battery. It's a recent type of battery that has a higher energy potential them nickel metal hydrides, NiMH batteries. They offer more capacity and can deliver more "punch" then other batteries in a smaller package. A motor requires a certain amount of voltage at a certain amount of amps to start moving. Lipo can deliver that, that's why a 2 cell lipo, 7.4volts can typically deliver the same performance as a 9.6 volt NiMH battery. Lipo can sustain higher amperage draw also for longer periods. It's called C rate, or discharge rate. Typical lipos are rated a 15 or 20C. 1C is equal to the capacity of the battery in AmpHour so a 2cell 2000mAH 20C battery will deliver 40amps at 7.4volt in bursts of 5 to 10 seconds. Each cell runs at a nominal 3.7 volts. Lipos also need a special charger because they are fragile. They need to be charged at a certain rate and you can't let them drain below 3volts or it kills the cell. That's why most people that run lipos also run a cell monitor that alerts you if you get close to 3volts. You can get started with lipos for less then 20$. Hobbyking sells butterfly lipos for around 7-8$ and you can pick up a basic turnigy 2cell balance charger for 6$. A lot of people go with a 3 cell setup that runs at 11.1volts but it will wear out your gearbox faster. It's a lot of power and it stresses internals. Hope this helps

Last edited by Nforcer; 01-29-2014 at 07:16 PM.
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Old 01-30-2014, 07:16 AM
OhioAirsoftJunkie OhioAirsoftJunkie is offline
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I was under the understanding that lithium ion and lithium polymer are different batteries. Basically lipos can hold more, higher voltage, and a smaller package.
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Old 01-30-2014, 10:54 AM
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do lipos have the same options as far as conections that nimh have? and is there any way to tell that its getting down near the 3 volt mark without a cell monitor? and where do you hook up the monitor?
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Old 01-30-2014, 04:07 PM
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You can use the same connections for a LiPo that you can for a NiMH, however on a higher discharge LiPo it's highly recommended that you switch to deans/T-connectors. To tell if it is at the mark you need a monitor, or you risk frying it. They're cheap, buy one for a few dollars and it will save you $ in the long run. Light indicator version: http://www.hobbyking.com/hobbyking/s...po_users_.html
Alarm version: http://www.hobbyking.com/hobbyking/s...rm_2s_4s_.html

You plug it in at the JST plug. The same plug you use for charging, labeled in this picture: http://traxxas.com/sites/default/fil...ded-view_m.jpg
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Old 01-30-2014, 10:08 PM
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Quote:
Originally Posted by sloan View Post
do lipos have the same options as far as conections that nimh have? and is there any way to tell that its getting down near the 3 volt mark without a cell monitor? and where do you hook up the monitor?
I, among many others, have found that when your gun begins to loose trigger response and/or rate of fire, its time to stop using the battery. At this point this is where the battery has depleted most of its stored charge and is now trying to drive your gun by chemical reaction alone at the expense of being a constant-voltage source. This generates heat, and heat kills your battery.

Quote:
Originally Posted by OhioAirsoftJunkie View Post
I was under the understanding that lithium ion and lithium polymer are different batteries. Basically lipos can hold more, higher voltage, and a smaller package.
Yes, those are two different battery chemistry's.
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Old 01-30-2014, 10:38 PM
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thanks everyone ill probably get some
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