It is a 5806 with white batt. Manufactured in 2008 which is the yr i got it.
5806 is vintage stuff, it was the 1st transition from metal handle slow 5800 w/ 4100mAh to lightweight fast 5800 w/ 3000mAh.
It's a 340 (850 sq ft) equivalent, except with lower capacity batt.
340 was released in 2007 using the same mold & parts from 380 (grey theme), minus the External Charging Base & 2nd Virtual Wall.
Shortly after emergence of 5806 (mid 2008), 330 w/ 3000mAh batt was released and had "500 sq ft" printed on retail box.
The "500 sq ft" retail box didn't last long (maybe 3 mths) before iRobot changed retail box wordings to "250 sq ft" instead.
I believe the reason is no one was buying 350 (500 sq ft), which iRobot could sell for US$100 more.
As 3000mAh batt was still in production until early 2010, 330 with early 2010 factory date still came with it.
The current batch WOOT 330 comes with 4100mAh, it could mean 3000mAh batt has ceased production. A cost cutting measure by iRobot, since running 2 production lines probably cost more.
iRobot has whipped out a series of cost-cutting measures since 2009.
They're making big money in their Military robots, and their market penetration of home robots is unshakeable due to millions of long time fans & many "user contributed" support forums.
Eg. of cost-cutting measures (Roomba):
- Bundling NiCD instead of NiMH for Roomba
- Removing Lighthouse feature from 560, saving on 3 Bluetooth chips per Roomba
- Reduction in size of Roomba 500 series box = less storage space required since warehouse space are rented
- The new recycled paper pulp packing vs earlier styrofoam packing is probably a Green Life initiative where big US corporation have to set good example
Eg. of cost-cutting measures (Scooba):
- Scooba Enzyme solution is probably more Green Life friendly vs Clorox, a smaller Enzyme solution bottle packs more usage than a larger bottle Clorox, so less storage space
- Less printed wordings on Scooba 330 main unit, now it's mostly molded bevel wordings. Printing words require a production line, molding words just requires modification to the mold cast
- Scooba 330 is now Made in China, whereas it used to be Assembled in China. We can expect much lower QC & DOA
