Sharp Mobilon HC-4000 Operation Manual page 18

For HC-4500 users:
You can use the supplied Ni-MH Rechargeable Battery Pack(HC-BN01) as the
main battery, together with the supplied AC adaptor (EA-58A):
Note:
When shipped, the Ni-MH Rechargeable Battery Pack is not charged; therefore,
you must charge it before use. The charging process takes about 3 hours.
Caution:
Use only the Ni-MH Rechargeable Battery Pack(HC-BN01) for the main battery
and a CR2032 lithium battery for the backup battery. Using other types of
batteries may result in loss of data.
Use the supplied AC adaptor (EA-58A) to charge the battery pack.
Always have the main battery installed and charged before installing the backup
battery.
1. Slide the battery replacement switch to the REPLACE MAIN BATTERIES
position. (When you release the switch, it may slip to the REPLACE BACKUP
BATTERY position. This is not a problem.)
2. Attach the battery pack to the unit, noting the position of the two projecting
parts on the battery pack.
Note:
Be careful not to bend or break the two projecting parts.
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