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What are the pros and cons of 18650 lithium-ion batteries?

18650 lithium-ion batteries will often provide you with more power and longer runtimes in the flashlight. They're also rechargeable which is a definite bonus. However, lithium-ion batteries do drain slowly over time and tend to be more costly than an Alkaline battery or lithium battery. Although, since they're rechargeable, you could save money over time with an 18650 lithium-ion battery. Another aspect to keep in mind is that they drain faster and their maximum capacity is reduced by cold temperatures. Learn more about 18650 batteries

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