But even if it's true , there's no lipo that has 120 amps.
Do you mean 120Amps 'Capacity' rather than the 'discharge current'?
If not, this 3S 2200mah LiPo can deliver 143 Amps Constant with minimal voltage lag.
http://hobbyking.com/hobbyking/store/__45130__Turnigy_nano_tech_A_SPEC_G2_2200mah_3S_65_130C_Lipo_Pack.htmli found online that a lipo's amps can be measured by (mah/1000*C) like a 2200mah 3s 30c battery gives 2200/1000*30=66amps is this correct
Correct
Rohan, The problem with your setup is that you have got yourself high speed motors which are more used for acrobatics and are not advisable for beginners. Motors in range of 900-1000KV is the most beginner friendly on a 3 cell stups on a 450 sized quad.
It's not like the 1400kv it's unflyable. But you just need to be more cautious in the beginning since this quad is going to be quite agile.
A Power source capable of delivering higher than than requirement is never an issue.
Think about it this way:
The electricity in your home wall socket is coming from a 800+ Amps Power source (Local Transformer in your locality) and you still can easily connect a 0.1 Amps Mobile charger in the same wall socket. All because the mobile charger consumes only 0.1 Amps and never more than that.
So your motor will consume a maximum of 26Amps each at full load and will never exceed that. No matter how big LiPo you connect to the Quad.
Another aspect is that you hardly fly the quad at full throttle. At full throttle the quad will gain altitude rapidly (unless you choose wrong sized props).
As a beginner, you would want to hover the quad as much possible which will be more like 30-40% throttle which will be roughly between 10-15 Amps/Motor (These figures will vary according to the size of the props being used)
As i can see, there are 2 ways you can choose a LiPo for your model.
1. Lower Amperage than required: Get a LiPo which can deliver a Max of 60-80 Amps or so. This will result in the quad not being so agile. The LiPo will be cheap. You will have somewhat easier control in the beginning since the LiPo will not be able to deliver the full current requirement. The drawback of this option is that this LiPo will have less life due to the fact it will be operating at close to 100% capacity most of the time. LiPo's usually do give up faster when they are constantly being used at 100% Amperage capacity. Once you learn to control the quad well with this LiPo, you can move on to bigger LiPo's in future for a more agile flight.
2. Full Amperage: Get a LiPo which can deliver 104 Amps+. This LiPo will cost more, and/or will be heavier. But it will have a longer life and you will get longer flight time.
About the Charger:
Most of the time the fault is not of the charger.
There is always a high chance of a LiPo's automatically get damaged when you let the voltage on any cell go below 3 volts. Basically a certain chemical reaction takes place in that once it's voltage drops to 3 volts or less making it permanently unusable.
That's why "LiPo Voltage Alarm" is used since they alarm you right when the voltage on any of the calls goes below a threshold. (Usually 3.8 volts is considered a safe threshold)
For now, Basic B3AC chargers would be more than enough for you. They are cheap as well as simple to operate.
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