Based on my vacation to China last year, I found that electronics were generally more expensive compared to the US (apple products especially...weird since it is made there). Although, it'd probably be more convenient to have it bought in SE Asia in your case especially if you want certain software in your language.
For battery life, macbooks will pretty much be the winners of that category. If you dont like macs, make sure to pay attention to the #cells of lithium-ion battery when comparing laptops for battery life. I'd advise you to also look at some consumer reviews of the laptop to see how the battery is too.