Item upgrades | General information Final Fantasy XIII Guide

In Final Fantasy you will be able to improve your weapons. Each item has its own experience bar that can be charged with some components found during the game. Important thing is that you can upgrade your weapon only in special places called save points (you have to pick the option: Upgrade).

These components can be divided in two groups: organic and mechanic. First one will give you less experience points but they will raise your multiply value and the others are good in rising EXP. The most important thing is to balance them in a proper way - use your organic components one after another and when the multiply value will get to the max (X3) then you can start upgrading your weapon with some mechanic parts. But when you will use them, multiply value will decrease (so you have to use as many of them at one time). In addition you can only one level at one improvement process. Maybe I will give you some example now:

You've got Lionheart lvl 1 with 0/4000 EXP. You don't know anything about requirements to the third level but, for sure, they are higher. So the best option is to use components worth 8000 EXP. As a matter of fact you will get Lionheart lvl 2 4000/4200 (or something close to this) EXP. You will be sure that the multiply value was used properly and that you didn't lose your valuable points.