I installed two TBM Li-ion packs in my28% WH Edge, one for a back up connected to a unused slot in the RX. Both packs are 2 cell, 7.4V, 2400mah Li - ions, connected to a 5.4 v regulator and a DSC Switch.
I am not looking for extendet Flight times, rather the safety of a back up pack. With all the hoopla about Li-ions, is this set up safe??