2 months ago I ordered an eGo kit from cignot. Now unfortunately both batteries are depleting too fast. 1 battery dies mid day (if lucky), the other one barely lasts all day. When new, both batteries lasted 48 hours easily. This depletion just started 3 days ago. So my question is, is it normal for e-cigarette batteries to loose their charge hold within 2 months, or is it just Joye batts? A friend of mine also ordered his 510 kit when I did and one of his batteries has bit the dust completely. If it's not normal for the lifespan to only be 2 months then what brands would you recommend for the 510 attys? In terms of lifespan and charge life. P.S. is it safe to use a USB extension cord to charge the battery? The 1' cord is really inconvenient, as I don't charge my cig in the kitchen or bathroom. Just curious because I know when I use a USB extension on my phone, the touch screen gets erratic.