Oki OKIFAX 5400 Maintenance Manual page 164

(3) Others
No.
1 Document feeder
2 Recording paper
feeder
3 Battery
4 MTBF
40838301TH Rev.1
Table 6.1 Reliability
Item
Jam occurrence and misfeeds in the automatic document
feeder will be less than one in 500 operations for all specified
documents.
Jam occurrence in the automatic paper feeder will be less than
one in 1,500 operations and misfeeds will be less than one in
500 operations for all specified recording paper.
The life of the battery is five years.
Lithium battery. Not rechargeable.
The MTBF for the overall machine will exceed 3,000 hours of
actual operation.
The MTBF will be measured at a confidence level of 95% under
controlled laboratory conditions.
The MTBF will be based on 50% transmit and 50% receive
activities.
Danger of explosion if battery is incorrectly replaced.
Replace only with the same or equivalent type
recommended by the manufacturer.
Dispose of used batteries according
to the manufacturer's instructions.
Specifications
CAUTION
6 - 2