The ThinkPad Battery 22 (4 cell), ThinkPad Battery 22++ (8 cell), ThinkPad Battery 31 (4 cell) and ThinkPad X60 Series Extended Life (4 cell) Battery are rechargeable system batteries that can replace your original system batteries or be swapped in as spares. These options all feature:

• Lithium-Ion technology
• Standard system battery specifications
• Over-discharge protection

The ThinkPad Battery 22 (4 cell) (40Y7001) features:

• Four-cell, rechargeable system battery
• Battery Performance watt-hours: 37.4 Wh
• Compatible with the ThinkPad External Battery Charger
• Previously named as: ThinkPad X60 Series 4 Cell Enhanced Capacity Battery

The ThinkPad Battery 22++ (8 cell) (40Y7003) features:

• Eight-cell, rechargeable system battery
• Battery Performance amp-hours: 5.2Ah
• Battery Performance watt-hours: 74.9 Wh
• Compatible with the ThinkPad External Battery Charger
• Previously named as: ThinkPad X60 Series 8 Cell High Capacity Battery

The ThinkPad Battery 31 (4 Cell) (40Y6999) features:

• Four-cell, rechargeable system battery
• Battery Performance watt-hours: 28.8 Wh
• Compatible with the ThinkPad External Battery Charger
• Previously named as: ThinkPad X60 Series 4 Cell Slim Line Battery

The ThinkPad X60 Series Extended Life Battery (4 cell) (40Y7005) features:

• Four-cell, rechargeable system battery
• Battery Performance watt-hours: 28.1 Wh
• Compatible with the ThinkPad External Battery Charger
• Connects to the docking connector on the bottom of ThinkPad X60 Series notebooks. Together with a system battery, it can extend user mobility and unplugged computing time.

• Battery 22 (4 cell) (40Y7001)
  • Approximate height: 24 mm (0.93 in)
  • Approximate width: 162 mm (6.39 in)
  • Approximate depth: 69 mm (2.71 in)
  • Weight: 260 g (0.57 lb)
• ThinkPad Battery 22++ (8 cell) (40Y7003):
  • Approximate height: 27 mm (1.05 in)
  • Approximate width: 269 mm (10.59 in)
  • Approximate depth: 95 mm (3.75 in)
  • Weight: 475 g (1.05 lb)
• ThinkPad Battery 31 (4 cell) (40Y6999):
  • Approximate height: 15 mm (0.58 in)
  • Approximate width: 177 mm (6.96 in)
  • Approximate depth: 69 mm (2.71 in)
  • Weight: 200 g (0.44 lb)
• ThinkPad X60 Series Extended Life Battery (4 cell) (40Y7005):
  • Approximate height: 34 mm (1.32 in)
  • Approximate width: 266 mm (10.46 in)
  • Approximate depth: 158 mm (6.21 in)
  • Weight: 370 g (0.82 lb)

1 year Limited – customer carry-in exchange

• Availability date: February 2006
• Discontinued, withdrawn form marketing:
  • February 2010: ThinkPad X60 Series Extended Life Battery (4 cell) (40Y7005)
    • No replacement available. This battery may be available via the Options Continuation Program at: www.lenovo.com/ocp

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