2 more awaken from the dead today. Couple of the things I noticed today was that 1 of the units the battery actually got flooded. Luckily when they built these the circuit board is pretty safe from water intrusion. On the other, the positive terminal of the battery had just cracked apart. When jumping from battery to board the unit awakened. Unfortunately there isn't enough battery lead to rework it, but the new batteries we're using are bigger and seem to be lasting folks longer anyways.