Lithium Iron (LiFe)
Lithium Iron offers good electrochemical performance with low resistance.
This is made possible with nano-scale cathode material.
The key benefits are enhanced safety, good thermal stability, tolerant to abuse, high current rating and long cycle life.
Storing a fully charged battery has minimal impact on the life span.
As trade-off, the lower voltage of 3.3V/cell reduces the specific energy to slightly less than Li-manganese.
In addition, cold temperature reduces performance, and elevated storage temperature shortens the service life (better than lead acid, NiCd or NiMH).