with 170W 20V lenovo p/n 45N0113 FRU 45N0114 with REV B or C or higher
the DC end must be keyed i.e. the plug into the laptop has notches vs. only being round inside
to power ThinkPad W520 4284-CV4
AC power cord for USA 2 prong preferred vs 3 prong plug
Lenovo reference....https://support.lenovo.com/en/documents ... ccessories
NOTE: I'm not a millionaire, I can only accept reasonably priced power supplies with reasonable shipping costs to TX, thanks.
Paypal payment preferred.
ONLY genuine Lenovo AC power adapters please
NO fakes, knock-offs, imitations please



