Yes, a little cmos battery. I have to take one out myself to reset the bios! You can download the manual from acer I think to locate it. It does invole carefully removing some things.
Transitional cell cancer of the renal pelvis and ureter is a disease in which malignant (cancer) cells form in the renal pelvis and ureter. The renal pelvis is the top part of the ureter. The ureter is a long tube that connects the kidney to the bladder. There are two kidneys, one on each side of the backbone, above the waist. The kidneys of an adult are about 5 inches long and 3 inches wide and are shaped like a kidney bean.
For kidney and renal pelvis cancer, 65.2% are diagnosed at the local stage. The 5-year survival for localized kidney and renal pelvis cancer is 92.6%. Percent of Cases & 5-Year Relative Survival by Stage at Diagnosis: Kidney and Renal Pelvis Cancer.