Difference between revisions of "Ultrabay Slim Battery"

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(Using the UltraBay Slim battery for hot-swapping the system battery: - tp_smapi)
(Linux Support: - tp_smapi)
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=== Linux Support ===
 
=== Linux Support ===
Second battery is correctly detected by either the APM or ACPI subsystem
+
Second battery is correctly detected by either the APM or ACPI subsystem. Battery charging control and extended status are provided by the [[SMAPI_support_for_Linux#Using_the_tp_smapi_module|tp_smapi]] module.
  
 
=== Supported with ===
 
=== Supported with ===

Revision as of 21:56, 22 December 2005

Ultrabay Slim Battery

This is a battery that slides into a supported Ultrabay Slim

Features

  • 10.8V Lithium-Ion
  • Capacity: 1.5Ah or 2.2Ah
  • Weight: 280g (0.48 lbs)
  • Charge time: 2.8 to 4.0 h
  • Up to 8 hours of battery life on select systems in combination with main battery

UltraBay Slim 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

NOT supported with

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.

Using the UltraBay Slim battery for hot-swapping the system battery

When the UltraBay Slim battery is inserted and charged, the system battery can be hot-swapped (i.e., replaced without the need to reboot, hibernate or use an external power adapter). However, the laptop will completely deplete the UltraBay battery before using its system battery, so to make hot-swapping useful you'll need to keep the Ultrabay Slim battery outside the Ultrabay during normal battery-powered usage. The complete depletion of the Ultrabay battery also reduces its lifetime.

Help needed
It may be possible to control which battery is discharged using the tp_smapi module. If you have an Ultrabay battery, please test the dual-battery operation of tp_smapi and report your results to its author or on the discussion page.