I need the following information in regards to Nickel cadmium battery/ Lithium ferrite battery
I tried searching online but did not find a good reference.
I am trying to understand the following concepts

1) how to charge / how to check charge level / maintenance/ how often keep it charged

2) energy capacity of each battery (volume/ physical size)

Is there any tutorial/ reference that can clarify these things?

 

This might be a start.

http://batteryuniversity.com/learn/article/charging_nickel_based_batteries

 

I did check that link before but for a beginner like me, its difficult to understand

 

If anyone has a good reference, please share

 

Battery university is the best reference that I know of, especially for laymen.

 

I did check that link before but for a beginner like me, its difficult to understand

Recharging most any battery is not a trivial task. Something like lithium is especially difficult. Just look at all of the lithium related fires in the news. It is best to leave this kind of charging to the experts. If an when something goes wrong you have someone to sue rather tahn convice your insurance company the source of the fire really had nothing to do with your home made charger.