I have a LG Optimus S Android on Gingerbread (The one on the cheaper side with least specs for an Android).
I have found that when I use the USB charger connected to my computer, at times instead of charging my phone, the battery gets drained. (Also I perceive that the battery gets drained faster than normal phone usage at such times)
While I have a fix which is to restart my Android phone. Could someone explain why such thing happens?