Here you've got the official rom and kernel if you want to take a look and help me:

http://storage.energysistem.com/archivos/drivers_y_actualizaciones/lihmefdljbii_FW_Android_4.2.2_2013_09_30REV_03.zip

http://storage.energysistem.com/archivos/drivers_y_actualizaciones/gidockjgdldg_kernel-rk3188-4.2-20130912-u.tar.gz

Is there any rom I could install to this tablet? 

I want to do this because it has a terrible battery performance (about 1 hour with the screen on) and it's not a problem of my tablet because other users have this problem too.

Thank you in advance.

Specs:

≥ Internet Tablet designed for Android™ 4.1.
≥ Rockchip 3188 processor: ARM Cortex A9 Quad Core 1.6 GHz with Quad Core Mali-400 GPU.
≥ 10.1” IPS HD 16:10 screen (1280x800 pixels).
≥ 10 points Multi-touch capacitive screen.
≥ Wi-Fi (802.11 b/g/n): connect to the Internet through a Wi-Fi access spot.
≥ Integrated front VGA and rear 2.0 Mpx cameras.
≥ 1GB RAM DDR3.
≥ 16GB internal storage memory.
≥ Expandable external storage via microSD-HC/XC cards (up to 64GB).
≥ USB Host Function: Connect your external USB devices (adapter included), USB sticks, hard drives,
keyboards ... etc.
≥ USB-OTG function for easy access to the tablet’s internal storage from your computer (cable included).
≥ Integrated speaker.
≥ Built-in omnidirectional microphone.
≥ Motion sensor (accelerometer).
≥ Installed Applications: Internet browser, email client, applications for music / videos / photos, alarm and
calculator.
≥ Allows you to install thousands of applications and games available for Android™ operating system.
≥ HDMI output for playback on your TV .
≥ 7300 mAh / 3.7V: up to 08 hours of Wi-Fi browsing.