I've been thinking about this all morning...
- low availability (can't find 800mAh with the same size as those in the FT mini clone)
- charging when on holidays/travel... a soda charger or luc4 are much more convienient
Don't know...
Look to many of the R/C sites for the batteries. I've used Hobby King dot com many times.
Why not just use the on board charge feature when traveling?