I encourage anyone who be have a battery issue to contact customer service , you machine have a two year warranty . now as for the one we purchase , its great . follow the instruction and let it charge at least the time specify , -lrb- I believe that be 21 hour -rrb- and we get 20 minute or better of good vacuum strength before you need to recharge . it have plenty of power for those little clean up job and save you from needee to drag out the full size vac . its really easy to clean and we have have no filter issue as some have say they have have . we be well please with this unit and use it for dust , crumb , cat hair , cat litter , etc. . very glad to have it as a option for keep thing neat and clean : -rrb-