ThinkPad Battery 39+

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ThinkPad Battery 39+ (0A36279)

This is a battery pack that attaches to the 2nd battery connector of a supported model.


  • Battery specification: 3.2Ah, 11.1V, 35.52Wh
  • Battery cell count: Six, 3.7V lithium-ion polymer pouch cell
  • Battery run time: up to 3 hours
  • Battery charge time: up to 40 minutes
  • Weight: 395 grams or 0.87 pounds

Thinkpad battery 39+.jpg

Part numbers

  • 42T4978 (42T4938)

Models supporting this accessory