TM batteries

[uglyokuma]

Has anyone tried these for their trolling motor?  

[Fishmedic]

Have one for my Minkota 55 on pontoon boat.  Works great. Lasts longer than lead acid battery I used before.  Also is half the weight of old battery.  Need a charger for lithium battery.  Only thing I don't like is it will read 12 volts all the way till dead so no real indicator of charge left. Usually lasts for three to four days out depending on wind and current.  

Grandson has same one for his kayak and ladts forever.