MFU-vs-Battery

[mtdriver]

It is an easy fix, you just need to keep a shop vac handy. When you let out the majic smoke, just suck it up, put the esc to the tube and hit reverse. All the smoke goes back in and viola! Your back in business!

In all seriousness, that sucks. In my experiences its not worth the cost, down time or hassle to get things like that repaired. Ive smoked a lot of electronics and they usually cost 60 to 80 percent of the original cost to repair.