A quick look gives me the impression that it's a rechargeable closed system, meaning you recharge the battery for as long as it lasts but you have to buy replacement pods becuase they are not refillable. Given that, I would be surprised if the pods leak since there is not fill port. If they do leak, it can't be much and it will be at the battery contacts on the pod. To maintain longevity of your system, frequent checking and maintenence of the contacts is always something you should do regardless of whether you buy a closed or open pod system. Vaping is more involved than smoking in that regard. Just ckeck the contacts on the battery and pod for leakage ever so often and and clean the contact even if you do not see any leakage.