Hi guys...i wanna buy a lipo for my quad , but iam not sure about the terms used for lipo specs . for ex , 'C' rating etc...can any pls enlighten me..!!!!

@shanx,
Welcome to RCI.
Fastest way to get answer is to Google 'Lipo C rating'.
But I'm sure you knew that already 
Regards

We'll I sure knw that..just that I wud b able to clarify stuff on d forum..it's any day better compared to googling concepts which we are unaware of..!

@shanx,
Well then, here goes:
1. 1s, 2s, 3s etc indicates the number of cells in the lipo
2. Nominal voltage per cell is 3.7v
3. Fully charged is 4.2v
4. 3v, 3.3v is fully discharged, depending on who you ask
5. 3.75-3.85v is 50% charge.
6. If lipo is not going to be used for a few weeks or more, must be stored at ~50% charge, 3.75-3.85v
7. Either above or below that, they will puff up and die
8. The C rating, multiplied by the capacity, indicates the max current that can be drawn continuously

A 20C, 1000mah lipo can provide max continuous draw of 20amps.
That's the theory/manufacturers' claim.
In practice, the actual C rating is far less than claimed, especially in non high end lipos.
I usually do not draw over 10C from a 20C rated lipo. Others draw more. But mine, used at much less than the rated draw, have lasted over 3 years...

Hope that helps.
But seriously, all this info is in the public domain, and easily accessible.
The Google search shows an RC Groups member saying there are some 10 million answers already...

When we choose to ASK, instead of SEARCHING first, it tells others something about us, no?
Regards

We'll firstly thanx for d info kk iyer...secondly iam a beginner and new to this forum..so iam just learning  stuff..iam unaware of wat d forum has in store for its members..so pls don't post any comments saying " wat ppl think abt " me wen iam hoping to be benefited by the forum.  ...!! Hope u understand... Cheers!