This Efest Soda charger is able to charge various batteries at 0.5A or 1A with a simple click of a switch. The 2 battery slots charge independently of each other and has built in protection listed below.
 
Specifications:
 
Over-voltage, over-discharging, short-circuit and reverse polarity protection
 
Adjust to Rapid charger or normal charger
 
Charger for 3.7V rechargeable 10440/ 14500/ 14650/ 16340/ 16650/ 17650/ 17670/ 18350/ 18490/ 18500/ 18650 Li-ion battery