as already described in other reviews, this magnifier has strong processing defects in the field of batteries. These can be put only by force, with the result that the insulation is damaged and there is a risk of short circuit. I have broken down this motion. Here burrs and sharp edges struck me, that prevent the batteries can be pushed to the contact forward. This ridge and the edge can be removed easily. You just have to be careful not to hurt the cable to the negative terminal. After these improvements, the magnifying glass to work properly again and the LED in conjunction with the glass lens give a good picture. 2 Stere I can but still only forgiven because the repair can be carried out only by experienced hobbyists and manufacturers that actually would have to carry themselves.
