Hello, I just got a Onda v971 tablet with JellyBean 4.2.2 and I experienced heaving battery draining issue. As a matter of fact, even that with light to moderate usage (surfing the web, few Youtube videos, Google current, etc.), about 20% on average of the battery heath was lost during a period of 30 minutes. However, my battery has 8000mAh as claimed so I really don't think that it was due to the capacity. Therefore, I try to focus more on the software of the tablet to see if I could do anything. Thus, after searching for a while on this forum, I discovered that the battery draining might caused by the "fuel_alerted" bug or kernel on the stock JellyBean. Any advice?