Bought to put in my garage box, (which has no electricity) .this flash projector very well and as I had a METABO perceuce with 2 batteries, AC adapt smoothly to the projector, which saved me buying battery that costs very expensive (150 to 200th battery) .I put 4 stars for the high took the projector. Rest autonomy, with a 14.4v battery 1.3AH ca must take over an hour. (Not tested).