Last night's test flight with new PMU and IOSD worked fine, and it started to drizzle so I quickly landed and came inside. Just plugged in a battery today and no loud happy chirps ... instead, a single repeating beep. Anyone know what that signal means? After I calm down I will tear the whole thing apart and perhaps remove, retest, and then reinstall the mods. I was finally happy with this setup. and I have some new batteries on order. I hope I don't have to send them back. Help!!