In theory, you can always use the charging bank to charge the mobile phone, because the charging bank has the same storage and charging function as the charging device, which will not cause direct harm to the mobile phone battery, but it can not be charged all the time, overcharging will damage the battery, and the selected charging bank should be qualified and adapted to the mobile phone to achieve the charging effect. Charging treasure can play the function of charger and spare battery, it is a collection of storage, boost, buck, charging in one of the charging equipment, so has been using the charging treasure to charge the mobile phone, and charging with the charger is no difference, basically will not cause direct harm to the mobile phone.