Why is a separate battery used for ejection charge ignition?
There are several reasons for this. In order to keep the overall size to a minimum, a tiny main battery was chosen. This battery provides plenty of power for the electronics, but does not supply enough current to operate ejection charge igniters. If you don t need the ejection features, you don t have to carry the heavy battery necessary for igniters. Even when you add the high-current NiCad ignition battery that we recommend, the altimeter with both batteries is lighter than just a standard 9V battery alone. Our altimeter/battery combination also fits in a 24mm body tube, something that even the 9V battery alone will not do! Our special NiCad battery has a lower internal resistance than common 9V batteries, allowing a greater current output for reliable ignition. You are not limited to flashbulbs with our system. Finally, separating the two power sources eliminates voltage glitches on the altimeter s power supply during ejection charge firing, which could cause corrupted data or prema
