Apple CEO Tim Cook said at the WSJD conference that the Apple Watch will require daily charging.

Apple CEO Tim Cook spoke in detail about the company's future plans during the WSJD Live conference Monday, stressing on the importance of Apple Pay, data privacy, Apple Watch and iPod. Among other notable things, Cook said the coveted Apple Watch, which is expected to hit stores early next year, will last about a day on a single charge.

The latest revelation about Apple Watch is one of the few details about the smartwatch's specs revealed to date.

"You're going to wind up charging it daily," Cook said in an interview with WSJ's managing editor Gerry Baker.

Availability or price was not revealed by Apple's chief. Cook mainly spoke about the growing Apple Pay network, data privacy and the end of iPod classic. Apple will no longer provide parts for the original 160GB iPod Classic, which was pulled off from the official stores last month.

Aside from the Apple Watch, Cook was excited about the rapid growth of Apple Pay. According to him, the company recorded more than 1 million credit and debit card activations during the first 72 hours of availability. Cook insisted that the new seamless solution for payments at retail outlets "looks fantastic" and that it has reached far more customers in the U.S. than all other mobile payment services combined.

Cook did not fail to mention in h is talk with Baker that Apple Pay was more secure than traditional credit cards. To avoid ending up in a situation like Target, Home Depot, Staples, Apple pushes the use of its new payment-via-mobile system for a secure transaction. In fact, Cook reiterated that Apple doesn't store any information about its consumers, which can in turn be exploited by the government, MacRumors reported.

"We're not big brother. We'll leave that to others," Cook said.

"Your data is yours. We don't keep iMessage data, record the temperature of your home or retain search history."