I haven't used them in flight yet but have done some simple testing.
My old AltAcc which uses a 9V battery worked fine. A RDAS Compact which uses a 2200uF capacitor charged to 9V failed. Touching one to a single cell Lipo worked.
In addition, the stated all fire current of 600mA is for a current pulse of unknown duration. Based on the failure of the RDAS, it was certainly greater than 200ms.
I am tempted to perform a good all fire current test with a 100ms pulse duration but that would require using about 30.