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ThinkPad G40 Series Li-Ion Battery - Overview


ThinkPad G40 Battery (08K8178)

At a glance

The ThinkPad G40 Series Li-Ion Battery (08K8178) is a rechargeable system battery. The system battery option can replace the original battery or can be easily swapped in to extend the unplugged computing time of the ThinkPad notebook. This 12-cell battery option delivers an output of 10.8 V. It can be recharged in as little as 4.5 to 8.5 hours, depending on the ThinkPad system usage while recharging.


  • Up to 3.0 hours of battery life without recharge
  • Over-discharge protection
  • Li-Ion technology
  • Twelve cells


1 year Limited - customer carry-in exchange


You will receive one box containing the following items:

  • Battery
  • Publication

Product dates


  • Announce date: April 2003
  • Planned availability date: May 2003
  • Discontinued, Withdrawn from marketing date: April 2009:

Technical specifications

Performance specifications as known at time of announcement

  • Battery life: up to 3.0 hours without recharge
  • Output voltage: 10.8 V dc (nominal)
  • Charge time:
    • Power off: 4.5 hours
    • Power on: 4.5 - 8.5 hours

Physical, environmental, and compatibility specifications as known at time of announcement


  • lbs: 1.43
  • g: 650
  • inches: .81
  • mm: 20.7
  • inches: 8.18
  • mm: 207.7
  • inches: 3.42
  • mm: 86.75

Operating temperature

  • between 5 degrees Celsius and 35 degrees Celsius
  • between 41 degrees Fahrenheit and 95 degrees Fahrenheit

Relative humidity

  • Operating: between 20% and 80% (non-condensing)

Agency approvals

  • CE MARK, UL, C-UL, C-Tick

Hardware compatibility

The ThinkPad G40 Series Li-Ion Battery is supported on all models of the ThinkPad G40, Machine Types 2387, 2388, and 2389.

Related Information:

Parts information
Lenovo Support: Batteries: Reference Guide - A list of other batteries
Personal Systems Reference (PSREF) - Comprehensive information on the features and technical specifications of Lenovo products.
All Day Computing (www.lenovo.com/alldaycomputing) - Information on batteries, including estimated battery life, and power adapters



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Disponibilidade País
ID do documento : PD011528
Legacy Document ID : MIGR-50422
Atualizado :
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