[RocketsNW] Batteries for Altimeter vs E-Match

[Hammer]

But how do you test them under load to ensure the battery is flight ready?

Robert

W. Raymond Stoner wrote:
> I'll assume that you know how to test volts...
>
> To test current.  Set your multimeter to measure the maximum current you
> can, this should be at least 10amps.  Most of the time you'll be moving the
> positive lead to another hole in the multimeter.  Then touch the leads to
> the battery posts for ONLY long enough to get the measurement.  You don't
> want to leave the leads on too long, maybe 1-2 seconds.  You are shorting
> the battery when you take this measurement, it will discharge quickly if you
> spend a long time getting the value.  On a fresh warm 9V, I've seen up to
> around 8 amps...on a cold fresh 9V, you'll see 5-6 amps.
>
> I've used batteries down to three amps measured current with no failures
> (knock on wood) on a PerfectFlite MAWD.
>
> Of course, you mileage may vary.
>
> Ray
>
>