Hii guys as you read the title acer aspire is best under 20k because in this range you dont get these features. It had 500 gb HDD , 4 gb DDR3L Ram and Intel Pentium Quad Core N3540 processor which is best under this range. This laptop is just for daily purpose use and it also had a great battery life. But the battery of this laptop is non removable because it have rechargeable cells not a big battery. This product is best in its range and I get it for my good marks in board examination from the govt. So guys this is the best notebook. I prefer to buy this. This is very valuable for money.