For each Lenovo Thinkpad there is a so-called Hardware Maintenance Manual (HMM) available. It describes the teardown and contains the part numbers. Just search the web for HMM and the model name.
I could imagine that the voltage tolerances are a bit wider than the maximum 5.5V the capacitor is specified for. So I would go for a 6+V 0.22F cap if it is available in the same housing.
I could imagine that the voltage tolerances are a bit wider than the maximum 5.5V the capacitor is specified for. So I would go for a 6+V 0.22F cap if it is available in the same housing.