After using a VHF handheld for years while duck hunting in January & February (sea ducks) I'd recommend that anyone considering a handheld to (1) buy a waterproof model, preferably the submergeable ones and (2) don't buy a rechareable, buy the newer ones that use AA alkaline batteries.
Some newer rechargeable units also accept an alternate battery pack that use AA batteries. A spare pack with extra batteries could be a life saver. The rechargeable NiCads are almost worthless in the cold, losing their rating capacity on an exponential factor as the ambient temperature drops. If you have/use one in the cold, keeop it inside your jacket breast pocket or similar to keep it warm.
BTW, these aren't just personal opinions, I worked for E&B/Bliss (now West) Marine, and the performance, or lack thereof, of the recharge NiCad packs was the biggest reason for returns and customer complaints. Up to a few years ago, a few Manufacturers reps we had even advised to use the handhelds as "backups" . . . gives you confidence - doesn't it?
Personally, I use a built-in VHF powered from main battery with a switchable battery backup protected from water in case of a swamping, along with a cell phone. Go with the most current, best rated model you can.
Dale