Topic: NP-120 equivalent battery specs

I have seen a battery I want to but that states it is equivalent to the NP-120 battery suggested by Chumby, but it has different power ratings to that mentioned on the Chumby battery page.

The specs are of the battery I want are:

3.6v 1600mAh

and the genuine Fujifilm battery is 3.7V, 1800 mAh

Will the equivalent battery work slightly less well or not at all?

Thanks for your assistance,

Re: NP-120 equivalent battery specs

I'm using a generic NP-120 with 1700mAh of capacity with no problem.  The 1600 mAh one should work too, just not run as long.