ang battery dali ra jud ma lowbat after 4 hours of continuously using the wifi...pero kung ebook reading lang naa sa mga 6~7 hours. Thanks to battery app sa Android market.
i bought mine from aliexpress.com pero naa pod sa ebay.com
for processor side, ang VIA ug Rockchip hinay ug non-upgradeable to Android 2.2 in case ang imong mapalit is 2.1. Telechips 8902 based processors are upgradeable to Android 2.2 and more faster and can do more multitasking.
System memory is not all 256MB ang uban 128MB. Naa pod 512MB ang system memory pero ang processor kay Cortex-A8 1Ghz. which is more faster, and more expensive almost times 2 sa presyo, recommended if ang imong purpose is more than ebook reading.
For the OS, most of them are Android 2.1 and some only are 2.2 version. But others still sell 1.6 versions mostly ana ang VIA processors. But I don't know if 1.6 that have VIA and Rockchip processors are upgradeable to 2.1. But for now, Android 2.2 upgrades are not yet stable. Pero kadtong tablet nga naa na 2.2 daan ok na to.
I only bought mine for ebook reading purposes and loading photos into it only. It is economical rather than buying a bunch of books and bringing it along wherever you go plus the additional weight.
By the way, 7 inch is ok for me and 10 inch is overkill.