i wanted a led work light to keep in my truck. there are lots of battery work lights but they can get pretty expensive. as well i found when you need it the battery is dead or dying. you can get cheap offroad led lights print the base then wire on a cable to clip to the battery and now you have a bright work light. 

i have included the model so you can change the magnet or hole size for the lights.

i used 20mm by 4mm magnets and 30mm by 3 mm

most led light mounts should fit i used “Zmoon LED Pod Lights 4.5'' Round LED Light Bar 2PCS, 140W 14000LM IP67 Waterproof LED Fog Lights, 12V 24V Universal LED Work Lights for Truck Jeep Tractor ATV UTV SUV” off of amazon