macbook pro high cpu while off charger

Hi forum.

my macbook pro mid 2011 i5 8 g ram, everytime i take it off the charger it goes crazy with nearly 100 percent high cpu, & its barely usable, the i stat cpu gauge
is full but soon as i put it back on the charger you can see the cpu just drop straight away back to normal & it is usable again.

Can a faulty battery cause these panics my battery has only 336 cycles not even half its life span. I read somewhere this guy had the same problem & he replaced the battery & solved his problem so i aint sure, i dont want to rush out & buy a new battery & it doesnt solve my problem.
At the moment I have applied the workaround which is helping but i dont seem to be getting full power of the cpu..

Thanx in advance forum..
link http://www.rdoxenham.com/?p=259

maflynn said:

What does the activity monitor say when on the battery? What processes are eating up your cycles?

Click to expand...

on battery kernel task is like 4 percent when you take it of the charger it goes
up to 100 percent the cpu box on stat menus is fully red .

the kernel task seems to be the culprit.