Epson HX-20 - Manual (Page 14)

recharge the HX-20 before you see that message, you will only
shorten the useful life of the batteries.
Charging the batteries for more than eight hours at a time will
shorten their life. Charging them continuously for more than seven
days can destroy them.
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If your batteries fail to hold a charge, take your HX-20 to an
Epson Service Center. DO NOT ATTEMPT TO REMOVE THE
BATTERIES YOURSELF, or you could damage your HX-20.
You may damage the HX-20’s built-in microprinter if you pull on
the paper while the printer is working.
You may, however, pull on the paper when the printer is inactive;
this will cause no damage to the printer.
HX-20
The sockets on the back of the HX-20 enable you to connect it to an
Epson disk drive or an RS-232 serial device such as a modem or a
printer. Sockets on the side of the HX-20 enable you to plug in a
bar-code reader or a cassette recorder.
Do not plug any device into these sockets unless it conforms to
the interface specifications listed at the back of this manual.
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