Different experience for me.
Using DoomMeister's diagram,
Cell 1 = P1 to P2 measured 1.5v
Cell 2 = P2 to P3 measured 1.5v
Cell 3 = P3 to P4 measured 2.5v
I used a variable DC Power supply (Eventek KPS3010D)to charge each cell, one at a time, for about a minute.
Using a variable supply will...