Just an update- the PlayBase is running really well. I have had an issue with standby battery life. I remembered that at one point I had bought Juice Defender Ultimate for my Epic 4g phone. Several f/w later, it's no longer needed or even installed. How about using it for the PlayBase?
Go to the E4G, re-download JDU [wow- google play keeps track of every app I've download...it's at the very bottom of the My Apps list...keep scrolling...forgot I bought that app...hmmm.....geez....really shouldn't be surprised, but yet I still am...weird...], find the apk and Wifi File Transfer (awesome program, and also AirDroid) it to the PB. After a little tweaking (you have to go into the advanced custom settings and tell JD not to manage the cell radios (there isn't one, but it'll jack the wifi up). Battery capacity is 3000 mAh, charger is 2000mA.
Battery life now is much improved. Now, it doesn't run itself down sitting on the counter overnight.