they work just fine
All of the lanterns worked.  They produce a very bright light with 4 LEDs.  Recharging is simple via hand crank (with plugin option).  The rechargeable battery in one of the units is weak and does not hold a charge well.  When the battery is low, the light is dim.  All of the units produce a very bright light when four AA batteries are added.  These lanterns produce perfectly adequate temporary or emergency light.
Rating: 4 stars