I've had my Cobra Libre device for a week and a half, and I've watched it charge pretty carefully each time it's been charged. Mine *does NOT* "Pulse" when charing, but the "Fun" part of 'Fun Factory', that is the upper word is on very, very bright while it charges fully.
As for full use, man if you can use it "until it died" as one poster wrote, either it's not getting charged fully or you are Mr. SuperDick! Can't imagine doing that with mine because it has never run out of power yet... And I mean major long session with the device, ie 1-2 hours or more straight time with it on its upper register settings. I do let mine charge as long as 18 hours however, and it takes all that time, at times, to completely saturate-charge the thing, don't ask me why.
Li-Ion batteries do not have "memory effect", so it shouldn't matter if you use it all up or just part of the charge is used up before you recharge it--it should charge successfully no matter what, the only variable being time itself to full charge.
About all this trouble many of you are having with keeping the thing connected, ie charge cord catch to Cobra Libre, I do NOT understand the problem as I have none of that! I simply place the Cobra Libre on the **EDGE** of my nightstand, or a rack of magazines (stacked about 2.5-feet high)nearby, and drape the charging cord so that it goes *straight down* for at least 1-foot of its length. This seems to keep the charging cord in proper orientation to where it never, ever comes displaced from the charging port's magnetic field and fix. I have never once had this problem of keeping the charger cord's magnetic catch aligned and affixed to the device, not once, and if you'd follow my lead I think you'll be successful also, and have no more hassles with the charging cord!!
The benefit to their charging system is the same as with my MacBook Pro laptop's charge cord connector to laptop port: if you trip or otherwise violently or very hard, knock the cord **OFF** the MBPro, it simply dislodges and doesn't break the end off the charging cord's attachment plug...a brilliant design, typical of Apple products. Looks like the nice Germans who are building this device took a lesson from the experts in the field of charge cords and connectors and designed the Cobra Libre's to mimic the Apple-design, and for me it works great!
You can rest assured that if you have an accident and trip over the Libre's charging cord that you will NOT damage the cable or the port connection, 99.99% sure of that. So look at the positive side of this whole subject, as the charge cord design is a winner, just like the device does what it's designed to do fantastically also!
Good luck to all who are using this trending device, because they are selling a ton a day it seems. Someone should write up a "how to" article on the Cobra Libre 'turbator device and explain many of the problems away. Problems like the charging cord issue that is so easily solved by placing the device on the literal edge of a table, night-stand, rack of books or magazines, and simply drooping the charging cord straight down at least 1-foot so that the cord's catch has no chance or reason to become dislodged from the Libre's magnetic charging port.
Forkula signs off now...