Keysight Technologies U1253B Schnellstart Handbuch Seite 5

For the battery charger, the main supply voltage
NOTE
fluctuations must not exceed ±10%.
CAUTION
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Keysight U1253B Quick Start Guide
charging after 10 seconds. It is recommended
not to charge the battery if the battery
capacity is over 90%.
Do not rotate the rotary switch from
position when charging the battery.
Perform battery charging only with 7.2 V or
8.4 V NiMH rechargeable battery, 9 V size.
Disconnect test leads from all the terminals
when charging the battery.
Ensure proper insertion of battery in the
multimeter, and follow the correct polarity.
A new rechargeable battery comes in a
discharged condition and must be charged
before use (refer to the U1253B User's and
Service Guide for charging instructions).
Upon initial use (or after a prolonged storage
period), the rechargeable battery may require
three to four charge/discharge cycles before
achieving maximum capacity. To discharge,
simply run the multimeter under the
rechargeable battery's power until it shuts
down or the low battery warning appears.
The multimeter may indicate that charging is
complete after ten minutes when charging a
new rechargeable battery. This is a normal
phenomenon with rechargeable batteries.
Remove the rechargeable battery from the
device, reinsert it, and repeat the charging
procedure.
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