Battery bulb and fuse tester this battery bulb and fuse tester is the perfect solution for checking various power levels the tester checks the power level of most 15v and 9b batteries most fuses and bulbs with an easy to read meter you can now determine what need to be disposed of and what needs to be kept includes 9 volt battery tester battery bulb and fuse batteries included to power sturdy and durable design easy to use and easy to read rolson warranty