Ultrabay Slim Battery

Ultrabay Slim Battery This is a battery that slides into a supported Ultrabay Slim Features 10.8V Lithium-Polymer Capacity: 1.5Ah or 2.2Ah Weight: 280g (0.48 lbs) Charge time: 2.8 to 4.0 h Battery life: "up to 2 hours without recharge", "up to 8 hours of battery life on select systems in combination with main battery"

IBM Partnumbers

• Order PN: 08K8190
• FRU PN: 08K8191

Linux Support

Second battery is correctly detected by either the APM or ACPI subsystem. Battery charging control and extended status are provided by the tp_smapi module.

Supported with

• ThinkPad T40, T40p, T41, T41p, T42, T42p, T43, T43p

NOT supported with

• UltraBase X4, ThinkPad X4 Dock

A note on capacity

The capacity of this battery is 1.5Ah or 2.2Ah. For comparison, in the ThinkPad T40 series, the 6-cell system battery has a capacity of 4.8Ah and the 9-cell system battery holds 7.2Ah. Thus, the UltraBay battery provides only a small improvement in total charge capacity.

Charging and discharging

See How to use UltraBay batteries.