What are good Li Ion batteries, aka vape batteries?

  18650 battery is cylindrical, there is liquid inside, because of battery design and materials, 18650 is suitable for high current, so almost all notebooks, electric cars are designed with 18650 battery ; only super notebook, because of energy saving, so can not be used 18650 battery and use a polymer lithium battery , especially tablet computer; digital camera because of the charge and discharge of the flash requires large voltage and instantaneous high current, so only 18650 similar battery, but the volume is slightly smaller.   The advantages of polymer lithium battery , small size, large capacity, the disadvantage are that the life is shorter than 18650, because of the use of different designs and materials, some have liquid inside, some are dry or colloidal, and high current discharge performance not as good as the 18650 cylindrical battery, so the need for large-capacity and small-volume electrical equipment, usually using polymer lithium batteries , the most typical performan