Xbee pro stops sending around 5.38 = 4.91 = 1.22V per cell
detect voltage dips and voltage below X

2012-08-06 23:00:58: AF|200112:4C66666666676567666667676666676763656363646060626462616061646565656267636A6C7068606666686A68697168
2012-08-06 23:01:03: POS|205047:"2012/08/02 06:22:11",,X:-0.39,Y:0.36,Z:-0.87,V:0.00,down,rssi:902(DC:0)
xbee sleep problem:
2012-08-06 23:01:03: AF|205182:6064676967666465636762615C5B5F5E60595E5857595A5458575E51585C59565759514E4F545453545554545652505553
2012-08-06 23:01:08: POS|210049:"2012/08/02 06:22:16",,X:-0.40,Y:0.36,Z:-0.86,V:(DC:0)
2012-08-06 23:01:08: AF|210114:384F514F5253545257565454534C4F5051504F505050504E4F515251504E4F515052535357565756585955555557555656
2012-08-06 23:01:13: POS|215048:"2012/08/02 06:22:21",,X:-0.40,Y:0.36,Z
2012-08-06 23:01:13: AF|215113:3A5257575650585959595754545353535557555656545555555353545151535252504F505452504F515253545250515254
2012-08-06 23:01:18: POS|220119:"2012/08/02 06:22:26",,X:-0.39,Y:0.36,Z:-0.86,V:0.00,down,rssi:903(DC:0)


Random noise due to no cap:
500113:818384878A8E92969897959493949697999998989B9EA1A2A2A4AAB2B8BEC1C0BEBAB7B5B2AEA9A39E9994939395979B9E

Better, but first samples are bad
2B2B2B2B2B2B2B2B2B2B2C2C2B2B2C2C2C2B2C2C2C2C2C2C2C2C2C2B2B2B2B2B2B2B2C2C2C2B2C2C2B2B2C2B2C2C2C2D
3F2B2B2B2C2C2C2C2C2C2C2B2C2C2C2C2C2C2C2C2C2C2C2C2C2C2C2C2B2C2B2C2C2C2C2C2C2C2C2C2C2C2C2C2C2C2C2D
2B2B2B2C2C2C2B2C2C2C2C2C2C2C2C2C2B2C2C2C2B2B2B2C2C2B2B2C2B2B2B2C2C2C2C2B2B2C2C2C2B2B2C2C2C2B2C2C2D
322C2B2B2B2B2B2C2C2C2B2B2C2C2C2C2C2C2C2B2B2B2C2C2C2C2C2C2C2B2B2B2C2C2B2C2C2C2C2C2C2C2C2C2C2C2C2C32


check for random noise:
2A2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2C2C2B2C
2A2B2B2B2B2B2B2B2B2B2B2C2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2C2C2C2B2B2B2B2B2B2B2B2B2B2D
2B2B2B2B2B2B2B2C2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2C2C2B2B2B2C2C2B2B2B2C2C2C2C2A
2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2D
2B2A2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2C2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B3F
2A2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2C
2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2C2B2B2B2B2C2C2B2B2B2B2B2B2B2B2C2C2C2B2B2C2B2B2B2B2C2C2B2B3C
2B2B2B2B2B2B2B2B2B2C2C2B2B2C2C2C2B2B2C2B2B2B2B2C2B2B2B2B2B2B2B2B2B2C2B2B2B2B2C2B2B2B2C2B2C2B2B2B2D
2A2B2B2B2B2B2B2B2C2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2C
2C2B2B2B2B2C2B2B2B2B2C2C2B2B2B2C2C2B2B2B2C2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2C2B2B2B2B2B2B2C2C
2A2B2B2B2B2B2B2B2B2B2B2B2B2B2B2C2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2C
302B2B2B2B2B2B2B2C2B2B2B2B2C2C2B2B2B2C2C2B2B2C2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2C
2A2B2B2B2B2B2B2B2B2B2B2B2B2C2B2B2B2C2B2B2B2B2B2B2B2B2B2B2B2B2B2B2C2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B33
2A2B2B2B2B2B2C2C2B2B2C2C2C2C2B2C2C2C2B2B2B2B2C2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2C
2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2C


Debug not sleeping and why I get 1 or 5 wakeups

00000000000000000000000100000100000000000000000000010000000000000001000000000000000000000101000000
370000000000000100010101010101010001010101010101000000010000010101000101010101010101010101010121
00000000000000000000000000000000000000000000000000000000000000000000000001000000000000000100010128
00000000000000000001000100000000000000000000000100000100000000000000000000000000000000000000000001
00000000000000000100000000000000000000000000000000000000000001000000000000000000000000000000000001
00000000000000000000000000000000000000000100000000000000000000000000000001000000000100000001
2C0000000000000000000000000000000101010000010101000001010000000000000100000000010101010100000000
0000000000000000000000000000000000000100000000000000000000000000000000000000000000000000000000002F
04000000000000000000000000000000000000000000000000000000000000000000000100000000000000000000000001
00000000010000000000000000000000000000000000000000000000000000000000000100000000000000000000000000
010000000000000000000000000000000000000000000001000000000000000000000000000000000000000000000100

01360102030303030203030303020202030303040405050404030303030002020203030303030203030303030303030305
370102020303030303030303030303030303030303020303030303030202030303020303030303030303030303030306


Better with triple strap, but still some noise
464A4A4A4A4A4A4A4B4A4A4A4A4A4A4A4A4A4A4A4A4B4A4A4A4A4A4A4A4A4A4A4A4A4A4A4A4A4A4A4A4A4A4A4A4A
474A4B4A4A4A4A4A4A4A4A4A4A4A4A4A4A4A4A4A4A4A4A4A4A4A4A4A4A4A4A4B4A4A4A4A4A4A4A4A4A4A4A4A4A4A4A4A4A
4A49464A4A4A4A4A4A4B4A4A4A4A4A4A4A4A4A4A4A4B4A4A4A4A4A4A4A4A4A4A4A4A4A4A4A4A4A4B4A4A4A4A4A4A4A4A4A


Fixed the diode:
When battery dies, signal does from 
D3D0D3D3D3D3D3D3D3D2D2D2D2D2D3D3D3D3D3D3D3D3D2D3D2D3D3D3D3D3D3D3D3D2D3D3D3D2D0D3D3D3D3D3D3D3D3D3D3
CFD3D3D3D3D3D3D3D3D3D3D3D3D3D3D3D3D3D3D3D3D3D3D3D3D3D3D3D3D2D2D3D2D2D2D2D2D3D2D2D2D3D3D3D3D3D3D3D3
D3D3D2D2D2D2D2D2D3D2D3D3D3D2D2D2D2D2D2D3D0D2D3D3D2D3D3D2D3D3D3D2D3D2D3D2D2D2D2D2D3D3D3D3D3D3D3D3D3
D3D3D3D3D3D2D2D2D2D2D2D3D2D3D2D3D2D2D2D2D2D3D3D3D3D3D3D3D3D3D3D3D3D3D3D3D3D3D3D3D3D3D3D3D3D3D3D3D3

to 
E4E4E4E4E4E4E4E4E4E4E4E4E4E4E4E4E4E2E4E4E4E4E4E4E4E4E4E4E4E4E4E4E4E4E4E4E4E4E4E4E4E4E4E4E4E4E4E4E5
E5E5E5E5E5E4E4E1E4E4E4E4E4E4E4E4E4E4E4E4E4E4E4E4E4E4E4E4E4E4E4E4E4E4E4E4E4E4E4E4E4E4E4E4E4E4E4E4E4
E1E4E4E4E4E4E4E4E4E4E4E4E4E4E5E4E4E4E4E4E4E4E4E4E4E4E4E4E4E4E4E4E4E4E4E4E4E4E4E1E4E4E4E4E4E4E4E4E4
E4E4E4E4E4E5E4E4E4E4E4E4E4E4E4E4E4E4E4E4E4E4E4E4E4E4E4E4E4E4E4E4E4E4E4E4E4E4E4E4E4E4E5E4E4E4E4E4E4

Slight noise (only '3', which is quite good).