Public sector
https://www.adiatek.com/en-ww/public-sector.aspxThe compact design, which makes them easy to manoeuvre, is belied by an extremely capacious water tank (up to 40l for ruby), while the lithium batteries ensure a continuous runtime of about two hours. Lithium batteries charge quickly in about 2/3 hours, unlike traditional batteries which can take as much as 8 hours. Related searches to: lithium