qualified electrician, I assure you, that this little screwdriver doing its taff then certe stains rehearsal all day battery will not follow, but a good matiner + aprem few hours before emptying, which is already not bad;) I used to catch me, lights, she never failed me, ceiling fixtures fesant some weight, tighten them happens to them now, it goes in in the woods, and c is one of the most powerful screwdriver wireless handheld that there 7,8nm c if my memories snt good! :) I'm delighted, fan of B & D I purchased all eyes close for its value for money, and the red color like a Ferrari you can only buy! thank you