[@TheForgottenArc] Take a look [url=http://dragonball.wikia.com/wiki/Android]here[/url] if you want more detail on the types of android and their powers etc. The gist I get from it is that with the "model" you have chosen is that to get stronger, he'd need to regularly absorb energy. Also likely is that he'd need to top up his energy or risk malfunctioning/shutting down. 

As for the absorbtion of ki waves, i'm pretty sure that 19 absorbed the Kamehameha after Goku was already pretty badly drained. I may be wrong however. 

Ultimately it's up to you how you want to run your character mate :cool