Quite a few bits and pieces of battery storing energy (8)
I believe the answer is:
terabyte
'quite a few bits' is the definition.
(a terabyte is made up of computer bits)
'pieces of battery storing energy' is the wordplay.
'pieces of' is an anagram indicator (I've seen this in other clues).
'storing' indicates putting letters inside.
'energy' becomes 'e' (physics symbol as in E=mc2).
'battery' anagrammed gives 'trabyte'.
'trabyte' placed around 'e' is 'TERABYTE'.
'and' acts as a link.
(Other definitions for terabyte that I've seen before include "Large unit of computer memory" , "1000 gigabytes of data information" .)