Is it possible to update CPU on asus e121 tablet

I'm a noob. Looking to buy the asus eee e121, but not looking forward to the awful battery life, and don't want to buy the Energizer external battery just yet either. I love technology but know very little about the guts.

Looking to see if I could update to a more power efficient CPU? I heard that the quad-core Tegra 3 is supposed to help the power consumption. How much work would it take to update the CPU on the asus eee 121 tablet with either the tegra 3 or sandy bridge? I don't know too much about having to change the motherboard/if the native motherboard on the asus is compatible but I'm willing to pay $300-400 for parts and installation. The sandy bridge can be had for $200. Think something like this would be possible?

Just trying to get some advice on ways to improve the battery life on this baby so any advice would help.
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  1. Here are some specs for the Asus:

    Operating System: Windows 7 Home Premium (64-bit)
    Display: 12.1-inch multi-touch pressure-sensing capacitive LED-backlit HD display (1280 x 800)
    Processor:Intel Core i5-470UM processor (1.33 GHz with Turbo Boost up to 1.86 GHz)
    Graphics: Intel HD graphics
    Wireless: 802.11 b/g/n (@ 2.4GHz), Bluetooth v3.0
    Memory: 4GB DDR3
    Storage: 64GB solid state drive
    Card Reader: 2-in-1 Card Reader (SD/MMC)
    Input / Output: 1 x Mic-in, 1 x 2-in-1 audio jack, 2 x USB 2.0 ports, 1 x mini-HDMI port
    Battery Pack: 4 cell polymer battery (up to 3 hours)3
    Dimensions: 12.28 x 8.15 x .66 –inches (W x D x H)
    Weight: 2.53 lbs
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