HI, I'm a novice doing community service communications backup 2-3 times a year preparing for the next emergency. Which is the better radio for me and why if you don't mind my asking?

Is Li-Ion better for me than NiCad or NiMH?

Would the LI-Ion output of 7.4 v reduce the 5w output power of the HT vs a 9.6 NiCad or NiMH?

Can Li-I remain plugged in to a trickle charge for months?

Thanks for your time