Lifespan not guaranteed. I've bought a total couple of vapes from JUULs since last year and EVERY most of them always stopped charging after a month. I had one warranty replacement and they would not honor any additional replacements, even though each product came registered. After spending about $500 on you guys then cant change your bad products with short life span, I am therefor done with these shoddy products. I recently found another company ganjaguys.net and their products are durable and of great quality. Its more than 4months i got vapes from them and still in good shape. Will gladly spend my money there.