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Rectangular black lithium-ion laptop battery with six cells

PISKEKAT

PISKEKAT 6-cell 48Wh 10.8V laptop battery for ThinkPad E430 E431 E435 E440 E445 E530 E531 E535 E540 E545 B590

SKU CH-YJKS-9T3GB

6-cell 48 Wh 10.8 V lithium-ion battery replaces Lenovo 0A36311 and fits ThinkPad E and B series models

  • Battery TypeLaptop Batteries
  • Li-ion chemistry delivers stable 10.8 V output for consistent performance
  • 48 Wh capacity provides extended runtime between charges
  • Six-cell design balances power density with reliable operation
  • Compatible with ThinkPad E and B series models including E430, E431, E435, E440, E445, E530, E531, E535, E540, E545 and B590
  • Rated for up to 500 recharge cycles over the battery life

Compatible ThinkPad models

This 48Wh 10.8V Li-ion battery replaces the Lenovo 75+ 6-cell pack for ThinkPad E430, E431, E435, E440, E445, E530, E531, E535, E540, E545 and B590. It matches part numbers 45N1048, 45N1049, 45N1043 and 45N1042 as well as 0A36311. The pack is intended for owners of those specific models who need a direct replacement.

Check your current battery

Verify that your existing battery carries one of the listed part numbers before ordering. Confirm the voltage reads 10.8V and the capacity is 48Wh on the label. Ensure the laptop model appears in the supported series above. The pack is not suitable for ThinkPad models outside the E and B ranges named in the compatibility list.

Build and daily use

The black 6-cell Li-ion housing fits the original battery bay without modification. Rated for up to 500 recharge cycles, it uses standard cell chemistry for routine office or mobile workloads. The form factor aligns with the factory latch and connector layout, so installation follows the usual removal and insertion steps.

Highlights

  • Li-ion chemistry delivers stable 10.8 V output for consistent performance
  • 48 Wh capacity provides extended runtime between charges
  • Six-cell design balances power density with reliable operation
  • Compatible with ThinkPad E and B series models including E430, E431, E435, E440, E445, E530, E531, E535, E540, E545 and B590
  • Rated for up to 500 recharge cycles over the battery life

Specifications

Battery TypeLaptop Batteries

Questions about this item

Does the PISKEKAT 48Wh 10.8V battery include any screws or tools, or must I buy them separately?

The battery ships as a single 6-cell Li-ion unit. No screws, tools or additional hardware are included; reuse the fixings from your ThinkPad E430, E440, E530, E540 or B590.

The part numbers 45N1048, 45N1049, 45N1043 and 45N1042 are all listed — which one matches my ThinkPad E435?

All four part numbers reference the same 48Wh 10.8V 6-cell design. Any of them replaces the original 0A36311 Battery 75+ in the E435, E445, E535 or E545 models.

What runtime can I expect from the 48Wh rating once the battery is fitted in a ThinkPad E530?

The 48Wh capacity restores the original 6-cell Battery 75+ runtime. Actual hours depend on workload, screen brightness and power settings, and the cell chemistry supports up to 500 recharge cycles.

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