HELSINKI — Nokia said Friday its top N8 model, aimed at making up lost ground in the smartphone market, has had power problems with some handsets not turning on after recharging.

(AP) -- Nokia Corp. said Friday its top N8 model, aimed at making up lost ground in the smart phone market, has had power problems with some handsets not turning on after recharging.

Nokia on Thursday confirmed that a small number of its N8 smartphones are experiencing power problems that affect a customer's ability to turn on the device.

Nokia, the world's top cellphone maker, has notified customers that some of its flagship N8 smartphones were sold with a power fault that meant they switched themselves off.

Nokia admitted the growth of its Windows Phone smartphone business has been held back by supply problems after it feared a potentially costly stockpile of unsold Lumia handsets.

A small number of Nokia N8 smartphones have power problems, but Nokia has promised to replace them Some Nokia N8 smartphones are turning themselves off or refusing to turn on after charging.