Charge the battery using the Soulblu caballero USB cable plugged into a computer USB port, or into a Soulblu wall plug for quicker and safer charging. It's not safe to use other chargers. It might also cause shortage and void its warranty.
It is time to charge Soulblu Caballero II battery once the light at the end of the battery (and diamond button) flash continuously or you cannot draw any vapour when you inhale. To avoid battery shortage, wipe off any moisture accumulated inside the battery fitting using a cotton bud prior to charging it.
To charge a Soulblu Caballero II battery simple screw the battery to the caballero II USB cable and plug into to a PC port or Soulblu Wall Plug. The battery is fully charged once the USB light indicator changes from red to blue. It takes up to 2 hours approximately for the battery to fully charge.