The Robin Pod Kit by ECT sports an ultra compact form factor, so it'll fit perfectly in your pocket. Although it's incredibly small it still has a 420mAh built in battery, which is quite surprising. You may be able to get through all day of vaping depending on how much you vape, but even then, it'll take no time to get this pod mod fully charged and ready to go. There's a couple other features as well which makes this tiny pod device well worth the cheap asking price.