Does anyone know if there is an easy way to completely drain the batteries? I know with normal rechargable batteries, the best habit is to drain the battery as much as possible before recharging to avoid "memory" issues and lengthen the life of the battery. I assume that it's the same for these. How dead is the battery when it starts the long blink? The only way I can think of to completely drain the battery is to suck on the end of the battery until it stops responding.