Power Bank is a portable charger that can be carried by individuals and reserves power by itself. It is mainly used to charge consumer electronic products such as handheld mobile devices (such as wireless phones and laptops), especially when there is no external power supply. Its main components include: a battery for electrical energy storage, a circuit (DC-DC converter) to stabilize the output voltage, and most mobile power supplies come with a charger for charging as a built-in battery.
Whaylan always adhere to the concept of "innovation drives development, science and technology leads the future", product research and development is quality-oriented, efficient-based, safety-oriented as the principle, the establishment of a strong, experienced R & D team, the company has been rated as science and technology small and medium-sized enterprises, specialized new enterprises, high-tech enterprises.
ince its establishment, the company has always adhered to the original intention of "let the whole world use clean energy", deeply plough into the field of power, electronic and electric energy transformation, and is committed to providing smart energy management and other overall solutions for families, industrial and commercial users and ground power stations with innovative technology, excellent products and professional services.
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Yesterday, the Tianyi 3G internet mobile phone trade fair kicked off in 2011. China Telecom displayed a strong appeal and more than 200 manufacturers participated. It is understood that China Telecom and Motorola, Samsung, Yulong Coolpad, HTC and other nine terminal manufacturers signed about 12 million terminals, accounting for about 30% of the total contract. The number of terminal purchases signed by the four major countries on behalf of businesses was 27.9 million. This time, China Telecom and the four major state-owned companies have made rare purchases for the industry. Yang Xiaowei, deputy general manager of China Telecom, said that he hopes to achieve the market scale target of 60 million handsets this year.
In recent years, China Telecom has vigorously promoted the sales scale of socialized channels. The latest attempt is to hand over deeply customized mobile phones to the above-mentioned four countries. According to relevant person in charge of China Telecom, at present, China Telecom’s 3G mobile phone has accounted for 50% of China Telecom’s overall mobile phone. 
Telecommunication Raises 40 Billion Yuan in Purchase of Mobile Phones
A new round of feasts for China's CDMA industry chain opened. Yesterday, China Telecom, together with the four major national players and dozens of mobile phone manufacturers, signed the largest purchase list of CDMA mobile phones this year: the total procurement volume is close to 40 million, involving a total amount of about 40 billion yuan, of which only the four major countries are purchasing parts. About 70%. What attracts people's attention is that Android phones will become the most relied mobile operating system of China Telecom. At the China Telecom booth, Android robots were covered with Tianyi badges.