How to Replace Batteries in Crank Flashlights
- 1). Purchase a hand crank flashlight with LED, or light emitting diode, light bulbs. Most already come with this type of bulb, but it's a good idea to check. LED bulbs last up to 10,000 hours.
- 2). Hold the flashlight in one hand and use the other hand to crank the handle for 30 seconds. Modern crank flashlights will stay lit for about five minutes with 30 seconds of cranking.
- 3). Point the flashlight in the direction you wish to illuminate. Crank the handle more to provide longer light.
