Magic Flight Launch Box Battery Caps are important for transporting your NiMH AA batteries safely. Battery caps are easily misplaced and when a battery without a cap contacts any metal, such as other batteries, coins, or keys, it can vent Potassium Hydroxide decreasing the batteries’ lifespan. Moreover, batteries contacting other metals can overheat and spark,  posing fire hazards. Fortunately, if you lose your battery caps, you can simply buy new ones like the Magic Flight Launch Box Battery Caps which are constructed from soft PVC and adorned with the Magic-Flight glyph. These caps are available in pairs to ensure your batteries always stay protected.