The NJOY King disposable but it will send you to the poorhouse in record time. Despite NJOY's ridiculous claims to the contrary you really get only the equivalent to about 8 to 10 cigarettes for $8.
As far as something with rechargeable batteries the Joye eRoll is the next best thing to the NJOY King for hands-free vaping but it does weigh more than the NJOY King. The quality of the vape is actually quite good, particularly considering the eRoll's diminutive size.