title_body: How do I re-charge the batteries of my S49 drone faster when outside? I have a small S49 quadcopter. After around 10-15 minutes, it often runs out of charge and needs recharging. My charger requires it to be plugged into a portable USB charger or to the mains. I have tried charging using my power bank, but it takes like 30 minutes to charge compared to 10 minutes at home using the mains.
  
  What other methods of charging could I use to charge it that will preferably charge it faster?
upvoted_answer: I couldn't find manual or just the specifications for this exact drone, but from what you wrote and what I see on the images it uses 1-Cell batteries charged with some USB adapter.
  You didn't specify which USB power-bank you have or which power adapter you use to charge from the mains.
  I assume it's some-kind of phone charger. These days phone chargers typically outputs current of 1.0-2.0A. So my guess is that your power-bank isn't capable of outputting these kinds of current.
  Try looking for a power-bank with QuickCharge (QC). They are capable of giving out currents up to 4.5A