On Thu, 07 Dec 2017 22:38:41 +0100, Emanuel Berg
wrote:

Speaking of the Ryobi cordless power tool
chain, I see there are no less then five
different batteries! All are 18V Lithium but
the Ah's are 1.3, 1.5, 2.5, 4.0 and 5.0.
What does that mean? Do you get more power for
a single drill or cut or whatever or can you
just do the same thing more times
before recharge?

The capacity is shown in Amp Hours so you can do the same thing more
times with the larger battery :-)

But of course the larger battery is heavier so if you are working at
arm's length perhaps you want the smaller one.
--
Cheers,

John B.