Extech Instruments S4000T User Manual page 23

4.2.1 Important Notes on Charging Batteries
The model S4000T printers require an adaptor output of 10VDC/1.32A.
The battery Fast-charge is initiated each time the power adapter is connected to the printer
The fast-charge controller checks the battery's voltage and temperature before the start of
the fast recharge process. If the battery voltage or the temperature is outside of the fast-
charge limits, the charger defaults to trickle charge at C/10 or 70 mA rate
Optional external battery chargers are available for Extech batteries. Refer to
"Printer Supplies" for detailed information.
4.2.2 Important Notes on Replacing Batteries
• Check for the correct Extech part number for the battery and only use that part for your new
battery
Risk of explosion if battery is replaced by an incorrect type
Dispose of used batteries according to instructions in Section 4.5
S4000T User's Guide Rev 1.2
Section 4.7
23