Technical information

Battery-Powered Operation
The following tables show the approximate charging times for the
battery pack.
When you use the lithium ion battery pack:
When you use the NiMH battery pack:
Conditions Charging Time
Operational charging 2.0–2.5 hours
Power-off charging 1.5–2.0 hours
Suspend-mode charging 1.5–2.0 hours
Conditions Charging Time
Operational charging 1.7 hours
Power-off charging 1.2 hours
Suspend-mode charging 1.2 hours
To discharge the battery:
Page 98.
If the NiMH battery pack is new or has not been used for a long
period of time, it will not reach full charge with only a single
charging. You must discharge and recharge it from three to six
times to maximize battery operating time.
Charging with the Travel Quick Charger
You can charge the battery pack with the Travel Quick Charger
(available as an option). For the charging procedure, refer to the
instructions supplied with the Travel Quick Charger.
94 IBM ThinkPad 755CX User's Guide