# Why is the maximum work done by a voltaic cell negative [closed]

The maximum work done by a voltaic cell is given by -nFE. Why the negative sign? From what I know, a battery does positive work on the load attached to it

## closed as off-topic by Pritt Balagopal, bon, Mithoron, Tyberius, M.A.R. ಠ_ಠSep 27 '17 at 16:00

This question appears to be off-topic. The users who voted to close gave this specific reason:

If this question can be reworded to fit the rules in the help center, please edit the question.

Maximum work is also taken as the change in Gibbs free energy $(ΔG)$.