Hi, it seems to me you haven't flashed the right firmware for your tablet. Be aware that for Sanei N10 Deluxe, you have two types of firmware:
1. For W1 Screens (fw 0242.rar) http://www.szsanei.c...down.asp?id=927
2. For W2 Screens (fw 0244.rar) http://www.szsanei.c...down.asp?id=928
The brightness problem you have suggests that. Check what happens when flashing W1 firmware to a W2 screen:
W2 Screen Sanei N10 tablets are said to come with firmware 0230.rar from factory. The other possibility is to open the back cover and verify which type of screen you have.
NOTE: Images were taken from another forum.
I own the same tablet (Sanei N10 Deluxe W1 screen) flashed with firmware 0242.rar (latest 4.0.4), rooted with Tasselhof script and it's working fine for now. Battery life watching videos, movies and gaming lasts for 6~8 continuos hours. If idle (sleep), then battery life is superb, I get more than 3~5 days. Battery calibration WON'T do you any good. Check this link http://www.slatedroi...111#entry452111
Sometimes, battery drains are caused by buggy applications. I suggest you first try measuring your battery life WITHOUT any external application.
As for you wifi issue, this tablet is not the best. However, there's been a slight improvement in the latest 4.0.4 firmware.
Hope this helps.
This post has been edited by PYNS: 29 December 2012 - 04:50 PM