Hi, for recently we didn't bring in the Scooba 390 cause we found that only the color changed and take out 3 times.
and we found the firmware has been update like Scooba 390 and same perform as 390 battery saving.

Cause after tired up my old battery in Scooba 380 old firmware only can cover 1 tank per changed of around 1 year old battery,
like now i got my new scooba 380 in new firmware so far my old battery still can cover up to 2 cycle per tank of full charged.
why not we plan to selling the 380 for the moment until the stocks last and no choice to force of sell the 390 

For Scooba 390
.  iRobot Scooba 380 Floor Washing Robot (Model : 6050)
.  Four packets of Scooba Hard Floor Cleaner, Natural Enzyme Formula
.  Advance Power Supply (APS) Battery
.  Scooba Battery Charger 
.  One Virtual Walls (each require 2 D batteries, not included) 
.  1 Year Warranty

VS

What's In The Box:
.  iRobot Scooba 380 Floor Washing Robot (Model : 6050)
.  Four packets of Scooba Hard Floor Cleaner, Natural Enzyme Formula
.  Advance Power Supply (APS) Battery
.  Scooba Battery Charger
.  Scooba Charging Base <-- (The charging base is most important of 2nd battery)
.  Scooba Storage Mat <-- (The mat can put the scooba after used and the bottom wet and put it on top)
.  Two Virtual Walls (each require 2 D batteries, not included) <-- This one if buy another you may spend money to get extra set)
.  1 Year Warranty

Hope you can understand of new products in get less items of feature. 

hi, Nobody said the Standard Bin & Aerovac Bin can be wash with tap water??

inside the bin got built-in motor once you wash and gone the warranty didnt cover for it.. 

i'll just notice about the Standard & Aerovac Filter can be wash after 3 months later of used.