Daniel Fynn wrote:
Please I have nine cells which are 2 volts, 2amp each. I need to
combine them to get 6 volts, 6amp, which connection is better -
connecting 3 cell in parallel (to obtain 2 volts 6amp) then i connect
the 3 groups in series or connecting 3 cells in series first to
obtain 6 volts, 2amp per set and connecting the set in parallel?

This question sounds suspiciously like a homework problem.