Originally Posted by
FlyJSH
I'd rather go back to lead acid. NiCads and MiMH can both go into an overcharged/overdrawn/overheated state that can lead to venting or fire. Lead acid generally do not (without actually throwing them into a fire).
Also, the nice thing about lead acid is they tend to fail slowly and have a more measurable output drop (they give warning when they are getting weak while NiCads and NiMHs do not).
That's what we did...all Ni batteries replaced with Pb over the last decade.
I'm sure Li batteries can be made safe enough for aviation use, at some significant cost, but not when the manufacturing is outsourced to certain latin american countries.