Been great if'n they'd put that info on their website also...............
I agree. That's what I liked about the Trueman RS/TF1:
"1. eGo-RS battery can be charged by an eGo USB charger directly. The usual charging time is 2.5 hours.
2. eGo-RS battery can also be charged by an external charger. The output of it is 3.7v 450mah. The charging will stop automatically at 4.2v when it's fully charged."
Zenvaporusa had this confusing statement
"This still does not have an eGo charger option for charging (by screwing the connector area into your standard eGo charger although it appears it will as is does screw into an eGo USB charger. But, the batteries were charged so I could not test this for sure. The manual didn't have any information other than that you plug it into a USB power source to charge such as the powered USB port on your computer or a car USB adapter (we would recommend an adapter that provides 2amps which we sell here at GotVapes). The display also, of course, shows the voltage you have set from 3.0-6.0. "
But nothing at gotvapes.