Li Ion vs NiMH Batteries

A primary advantage of using Li Ion battery instead of a NiMH battery in your cell phone is:

Li Ion batteries are lighter

Li Ion batteries have a higher energy density, allow them to:

Store more energy in a smaller space

Why do Li Ion batteries lose less charge when not in use?

Because they have a lower self discharge rate

What do Li Ion batteries not suffer from?

The memory effect

How can NiMH Batteries lose their maximum energy capacity?

If repeatedly recharged before being fully discharged