[gmcs]

Has anybody used them and what is the battery life like

Have a three stoery communal area clean but there is only one power point on ground floor

[pdl]

They are Cr*p, the charge does not last very long, they are under powered and once you have been using them for about a month the battery performance is really reduced becauce of the constant recharging.  My advice get a long yellow and black extention cable and a few warning signs.