[CODE] If you charge it and it comes up, but then drops, I would suspect a bad pack. [/CODE] Cell 3 won't charge. Currently reading 4.19V, 4.19V, and 1.30V (cell 1,2,3). That's with it setting on the charger since my post 2 hours ago, charging display off, no tank attached. I am beginning to suspect a board issue. Cell 3 has now "stabilized" at 1.3V. During the time it was gradually dropping (even though it should have been charging), I noticed the USB current was very low, somewhere around 0.020 A and dropping as the charge on cell 3 dropped. Now that cell 3 is steady at 1.30V, the USB power and current are both showing zero (USB voltage is showing 4.766V). UPDATE: The drain is now affecting the other 2 cells. Current readings are 4.17. 4.12 and 1.29 (cells 1,2,3) (7/29 firmware)