A power bank. 1. Because mobile phone power has become an indispensable part of modern life, people often use mobile phones to navigate, make phone calls, take photos, play games, etc., which is easy to cause power exhaustion. The charging bank can provide power supplement for the mobile phone and become an important companion for the mobile phone. 2. In addition to the charging bank, there are some smart watches, bracelets and other devices can also be more portable for mobile phone charging, but the charging bank is more general, lower cost, more popular with the public.
It should be noted that safety issues need to be considered when using the power bank, choose regular brands and legal channels to purchase, and do not use inferior or damaged power banks.