Amazon.com: thinkpad r50e

10.80V (Compatible with 11.10V),7200mAh,Li-ion, Replacement Laptop Battery for IBM ThinkPad R50, R50e, R51, R51e, R52, T40, T41, T42, T43 Series (Extra), (Fits selected models only), Compatible Part Numbers: 08K8194, 92P1010, 92P1011, 92P1013 ...

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