Hi everyone i have a mbp 2010 i5 cpu 8gb ram and 500 hdd. its work good but i think not good enough im not a gamer or coder im just surfing on the internet and watching youtube etc check mail and office things. when i surfing sometimes i have laggy chrome and im thinking should i upgrade my hdd to sdd for performance. The second question i had dead battery and i took it now im using without battery and i heard that its effect mac performance. should i buy a new one? that's all my questions i ll be happy if u reply this post.