Did you test/check the 9v battery?
I just had a brand new one with a 2015 expiration date that only had 4.3 volts right out of the package!
That's 3 x's this year already!
I use the quest with no problem so far.
Yes you can use a 12v gel cell.[lawn mower/ motorcycle/emergency battery/ jump start package battery] 15-40 bucks. Will supply endless power for micro's
L-3 Tripoli 9693 Tap
ICBM Orangeburg SC
QCRS Princeton ILL
MDRA Price Maryland
Woosh Bong Wisconsin
"Made" member of Chicago Rocket Mafia
Rocketry...........an exact science.......but not exactly !!!