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ThinkPad Battery 28++ (9 cell slice) - Overview

Features and specifications

Stay unplugged longer with this genuine ThinkPad battery. This rechargeable battery uses Lithium-Ion technology and can be used as replacement for aging system batteries or as a convenient spare battery.

  • Lithium-Ion (Li-Ion) technology
  • 9 cell slice secondary battery attached to bottom of system
  • Connection via docking port
  • Battery energy (Watt-hours): 94 Wh
  • Mechanical On/Off indicator
  • Compatible with the ThinkPad External Battery Charger (40Y7625)


Technical information:
  • 9 cells
  • Lithium-Ion (Li-ion) technology


Performance specifications:
  • Battery energy (Watt-hours): 94 Wh
  • Battery capacity (Amp-hour): 8.4 Ah
  • Output voltage: 11.1V dc (nominal)


Manuals  Version
 Release Date
Warranty Information (2.9 MB) Nov 2014 1 Dec 2014
Important information about Lenovo batteries (2.9 MB)
Nov 2014 1 Dec 2014


Physical specifications:
  • Approximate height: 29 mm (1.1 in)
  • Approximate width: 305 mm (12.0 in)
  • Approximate depth: 103 mm (4.1 in)
  • Approximate weight: 0.61 kg (1.4 lbs)



1 year – Customer Replaceable Unit (CRU)

  • Announce date: 05 Jun 2012 (Worldwide)
  • Availability date: 05 Jun 2012 (Worldwide)


Hardware compatibility
Description Machine Type Models
ThinkPad T410/T410i All All
ThinkPad T420/T420i All All
ThinkPad T430/T430i All All
ThinkPad T510/T510i All All
ThinkPad T520/T520i All All
ThinkPad T530/T530i All All
ThinkPad W510 All All
ThinkPad W520 All All
ThinkPad W530 All All

Note: For the latest updates on the compatible systems, please refer to the Accessories Compatibility Guide.

  • Battery
  • Publications


Operating environment
  • Temperature: 5 deg to 35 deg C (41 deg to 95 deg F)
  • Relative humidity: 8% to 95%
  • Shock: 50cm free drop
  • Vibration (Random RMS): 1.04 G (2 Hz to 200 Hz)


Agency approvals
  • UL/cUL
  • ACA/C-Tickv
  • PSE
  • KC


Additional product information
Service parts - Parts listing for your product
Personal Systems Reference (PSREF) - Comprehensive information on the features and technical specifications of Lenovo products.


  • Alias ID:
  • Document ID: PD024286
  • Last Updated :15 Jan 2015
  • (c) 2015 Lenovo