i've perused the various threads of discussion about the DR-680 and battery power in search of a solution to my DR-680 problems, and so far i've found no solution. i started out using a Tekkeon and the DR-680 would always die 1-2 hours into a show. after 10-15 minutes of rest it would come back to life, but it was consistently unreliable with the Tekkeon. i then went to a battery from batterygeek and the unit stopped dying, but now i have a new problem... strange digi noise at various points on the recording. i've tried two different DR-680s and have run the external battery at 9v as well as 12v with the exact same results
whatever is going on with the DR-680 it seems to be very picky about external battery power and for the most point just doesn't work properly when powered by an external battery. at least that is my conclusion after about a dozen shows of consistent problems.
i'm at the point of bagging the DR-680 and taking the loss and either going to an R-44 or saving up for the 744... or perhaps even just staying with the simple and very reliable stereo set-up which
never fails (mics > Aerco MP-2 > Sony M10). however, before i totally give up on the DR-680 i'm seeking any suggestions / feedback from those that may be able to help.