Battery is not performing well

my battery life is not 8 hours its life span is less than so how can i get more life spanned battery

Yes,  It's a fairly simple replacement.
http://www.ifixit.com/Device/MacBook_Air

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    New iPad Slow to Recharge, Barely Charges During Use
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    Last edited by MDstr (2011-06-13 13:43:24)

    djpohly wrote:qelo: what kind of card do you have?  Maybe we have a different problem from the OP...?
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    [   13.522300] iwl4965: Intel(R) Wireless WiFi 4965 driver for Linux, in-tree:
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    [   13.522503] iwl4965 0000:04:00.0: PCI INT A -> GSI 17 (level, low) -> IRQ 17
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    [  276.389009] iwl4965 0000:04:00.0: Aggregation not enabled for tid 6 because load = 1
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    [14916.337475] iwl4965 0000:04:00.0: iwl4965_tx_agg_start on ra = xx:xx:xx:xx:xx:xx tid = 0
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    [21043.402115] iwl4965 0000:04:00.0: Aggregation not enabled for tid 6 because load = 1
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    douglasfromsan pedro sula wrote:
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