Cuba struggled to restore power Monday after another nationwide blackout, with the extended darkness prompting some frustrated residents to bang pots and pans in small-scale protests. In pitch-black Old Havana, residents stood on balconies and hung out of windows thumping kitchenware and clapping in an hour-long protest at a power cut that began on Sunday. Advertisement AdvertisementAdvertisement AdvertisementMost Cubans now have power only for a few hours a day at best, making normal life nearly impossible. Advertisement AdvertisementAdvertisement AdvertisementBy midday Monday, about 50 percent of Havana had electricity restored, as well as seven provinces in central and western Cuba. The state electricity firm said efforts to restore power had been hampered by bad weather.