Decided it was time to replace my big, bulky, battery hungry W520, as it was starting to fail on me. So, I decided to get a smaller, but loved ThinkPad X230. :
0A36303 0A36302 Laptop Battery Compatible with Lenovo ThinkPad T430 T530 W530 T420 T410 T520 T510 W510 W520 L412 42T4793 42T4755 42T4763 42T4848 45N1000 42T4791 51J0499 (73Wh 9-Cell) - Walmart.com
Lenovo ThinkPad W520 battery
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Lenovo ThinkPad W520 4282 Battery Replacement | LenovoBatt.com
Lenovo Replacement Laptop Battery 42T4791 for T510 T520 T530 T520I T410 T420 T430 T410I T420I T430I W510 W520 W530 W530I - Micro Center
Amazon.com: Battery for Lenovo ThinkPad E40 E50 E420 E425 E520 E525 L410 L412 L420 L421 L510 L512 L520 SL410 2842 SL510 T410 T410i T420 T510 T520 W510 W520 ThinkPad Edge 14" 05787UJ
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Lenovo ThinkPad W520 4276 Battery Replacement | LenovoBatt.com
Lenovo ThinkPad W520 4260 Battery Replacement | LenovoBatt.com
For Lenovo 55++ Battery 42T4798 42T4799 T410 T420 T510 T520 W510 W520 SL410 | eBay
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Amazon.com: GHU Premium 73Wh Extended Life Battery for Lenovo ThinkPad T420, T430, W510, Compatible with Lenovo 0A36303, Lenovo T420 Battery 6 Cell, ThinkPad W510 Battery, 42T4791 Battery, Lasts More than 5 Hours :
Lenovo IBM ThinkPad W520 Extended Life Replacement Battery
45N1005 Battery for Lenovo ThinkPad 70+ T430 T530 W530 L530 W520 57Wh | eBay
Amazon.com: Gomarty T430 Battery for Lenovo Thinkpad 70++ T410 T420 T510 T520 T530 T530I SL410 SL510 E420 E520 W510 W520 W530 45N1001 42T4733 42T4751 42T4752 42T4753 45N1000 42T4731 42T4235 42T4757 42T4755 :
Amazon.com: Trimnpy T410 T510 Laptop Battery New Replacement for Lenovo ThinkPad SL410 W510 W520 T520 E40 E50 E420 E425 E520 E525 L412 L420 L510 L512 L520 SL510 P/N 0A36303 42T4799 42T4751 10.8V
Lenovo ThinkPad W520 Review - StorageReview.com
Laptop Battery For Lenovo ThinkPad E420 E520 T510 T520 W510 W520 SL410k SL510 - Walmart.com
