On 15/11/2016 22:57, John Rumm wrote:

That is where Li-Ion wins - it does not auto discharge quickly like
NiMh, and had better capacity (usually) than NiCd. So its better for
occasional use.


Corded is even better from that point of view. For *very* occasional
use, the added hassle of having to use an extension lead is far less
than the hassle of having to charge it before use or, worse still,
having to throw it away because the battery is knackered.