Macbook acting up just in time for college to start

i have mid 2010 macbookpro 13"
version: 10.9.4
processor: 2.4 ghz intel core 2 duo

week ago mac died/ran out of battery first time in months. threw on charger night , next day when went turn on , hear starting boot second , shut down. , keep repeating process every 10 seconds until pressed power button again. few hours later tried again , turned on no problem , worked fine next few days.

however, been randomly shutting down on me , seems happening more , more. know there many threads , ive done research on seems theres couple different things causing this, , im looking guys distinguish that. college started week , wouldnt able live without mac

when @ system logs after randomly shuts off, see this.

3:13:12 pm kernel: previous shutdown cause: 0

, around

kernel: smc:: smcreadkeyaction error: smcreaddata8 failed key lsnm (ksmckeynotfound)

if need me can post full logs.

help. appreciated

 

i think battery might going dead , may need replacing. in meantime, have tried resetting smc?

had similar issue mines, due large amount of dust build inside machine.

 

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