Purchasing a Laptop is so expensive, but if you really need it so badly then give yourself a break to have one. Having your own laptop requires a full of care, from hardware to software. You must have at least a bit of knowledge about pc troubleshooting or some basics information.
Taking care of your gadget including the laptop batteries need much of your attention and awareness as well. Let your laptop battery have a long life. These batteries are just like people. eventually and inevitably, they die. You can’t expect next year’s batteries to last twice as long as this year’s. Battery technology may improve a bit over time (after all, there’s plenty of financial incentive for better batteries), but, while interesting possibilities may pop up, don’t expect major battery breakthroughs in the near future.
And lastly? Get a sturdy, high quality door lock.