Intermec PB42 User Manual page 18

2 Insert batteries into the two battery slots until they lock in
place. The contact side of the battery faces the back of the
printer. The printer plays the Power sound when you insert
the battery completely.
3 Close the battery cover by pulling the battery cover latch
toward the front of the printer and pushing down.
PB42/PB42c Portable Receipt Printer User's Guide
Batteries
Battery
cover
Battery
cover
Battery
cover
latch
17