8 General Disassemble  
Agilent U1602B/U1604B User’s and Service Guide  163
Do not use non-rechargeable batteries (alkaline, carbon-zinc, etc.) with AC power 
adapter connected. 
For battery replacement, ensure the new battery pack are located in the correct polarity in 
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.