1. For folks who choose flashlights that use primary (disposable batteries) I like to stick with AA or AAA batteries as they are a lot easier to find almost anywhere than camera cr123โ€™s or button cells, personally I prefer usb rechargeable flashlights (just remember to charge them like your cellphone) for students on a budget I recommend a AA flashlight that is water and shock resistant that can tolerate a drop here and there for preflight and a red / white LED headlamp for hands free low intensity night vision as you have your hands full flying the plane ( Avoid weird battery types as you may be very well out of luck if you need a new set.) I always recommend carrying a spare set of batteries and for those who like rechargeables like myself I recommend two separate sources of light so if one runs out or goes south you have a backup

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