Charging on the go is actually a thing now. A portable single 18650 charger that you can take with you when you're out and about.. Small, discrete, and portable, charging anytime you need it. 

USB charging only! No wall plug is included.

FEATURES:

• Fast charging at 1A
• Fits 3.6 or 3.7 volt batteries
• Reverse polarity protectionNitecore
• Activation function
• Auto detect charging function
• Over charging protection
• Short circuit protection
• Spring action makes a smooth sliding action when installing or removing batteries
• Steel cathode with low resistance and hard chromium plating to achieve a more precise charging voltage