Agilent Technologies U1602A User's And Service Manual page 188

8 General Disassemble
Do not use non-rechargeable batteries (alkaline, carbon-zinc, etc.) with AC power
WARN IN G
adapter connected.
For battery replacement, ensure the new battery pack are located in the correct polarity in
N O TE
the battery compartment and proper contacts between the 3-wire connection to the PCBA
board. Assemble the battery pack into the instrument by following the reverse diassemble
process.
188 Agilent U1602A/U1604A User's and Service Guide