North Coast Rocketry Adrel Battery ADR 811
This battery is the only one recommended for the Adrel Altimeter. Special adapter plug hooks up to power the altimeter, and hooks into the data port to be charged.
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Adrel battery
I always appreciate erockets because they offer products I can't find elsewhere. Actually, I will probably cut-off the connector from the battery and use that part. I recently realized that I probably won't need the Adrel electronics for current NAR competition, but I will save the parts for later.