Li-ion battery pack from non- identical batteries
Take the advice of all 3 commenters so far. The approach that your are taking violates a number of rules" of good practice, sensibility, reasonable safety and living to a ripe old age.

Not knowing what you are doing is acceptable. We all start there and to some extent are always there BUT - continuing in the face of warnings from those with substantial experience may result in you never getting old enough to gain that experience. Not likely, but LiIon cells really can be that bad. 

LiIon is prone to "vent with flame" at the best of times if you violate certain "rules". At the worst of times the chances of avoiding vent with flame is low. You are deep into "worst of times" territory.  At the power levels that you are talking about you AT A MINIMUM want 


well matched cells, 
well balanced charging and 
good cell protection suited to the cells and application and 
"reasonable" knowledge. 


Doing it with none of these, which is your situation,  is a "really really bad idea". 

Start with Battery University

BU has many articles on LiIon use

Also, on stack exchange:

Lithium Ion

My SE answers re
Lithium Ion and
LiIon (they will overlap)