Proface PS4800 - 19 Panel PC" - Manual (Page 128)

Hardware Modifications
128
Years to 80% of battery capacity (guide of the battery lifespan when applying current)
Diagrams of the Temperature and Lifespan to 20 % of Battery Capacity
(guide of the battery lifespan when storing)
Ambient Temperature ( o C)
Years to 80% of Battery
Capacity
Temperature Lifespan
(days) Diagram
25
°C (77 °F)
14600
30
°C (86 °F)
9467
35
°C (95 °F)
6139
40
°C (104 °F)
3980
45
°C (113 °F)
2581
50
°C (122 °F)
1674
55
°C (131 °F)
1085
60
°C (140 °F)
704
65
°C (149 °F)
458
70
°C (158 °F)
298
75
°C (167 °F)
192
80
°C (176 °F)
124