User manual
Chapter 7: Peripheral Devices & Accessories
Charging Batteries
328
Psion Teklogix 7535/7530 Hand-Held Computer User Manual
Table 7.1 Gang Charger Indicators
7.5.4 Charging Batteries
• Install the battery with the battery contacts facing the charger. Slide the battery
between the guide rails until it lightly latches in place.
The LED directly below the slot in which a battery is inserted lights up immediately.
A solid yellow LED indicates that the battery is being charged. If the battery
temperature is outside
5° C to 39° C (41° F to 102° F), the LED flashes yellow until the
temperature is acceptable. A fully discharged battery will normally take between 1.5
and 4 hours to charge. When the battery charge reaches 75%, the indicator flashes
green. At full capacity, it turns solid green.
When the battery is fully charged, the charger stops applying power; the battery
cannot be overcharged if left in the charger slot. The 75% charge indicator is handy
if you need a quick recharge – it often occurs after less than an hour.
7.5.5 Troubleshooting
7.5.5.1 Excessive Charge Duration
The charger is equipped with a recalibration function – a function that fully
discharges and then fully recharges the battery. This process is necessary to
recalibrate the battery capacity gauge internal to the battery. The charger attempts
recalibration when:
• the battery capacity is at less than 30%, and
• the battery has undergone more than 40 partial charge cycles since the last full dis-
charge.
A complete battery discharge takes between 1.5 and 4 hours to complete. When in
discharge mode, the LED indicator flashes yellow. The recalibration function
extends the charge time by up to 2 hours.
Flashing
yellow
Battery temperature out of charge range between 5° C
to 39° C (41° F to 102° F). This icon indicates that the
charger is waiting to charge. Charging is attempted
every five minutes until the battery is within the
appropriate temperature range.
Solid red
Battery rejected (at insertion) or unable to complete
charge on battery
Flashing red
Charging circuit problem. Refer to “Troubleshooting”
on page 328.