The battery life on the Compaq Presario c700 series laptop doesn't seem to be that good it tends to run for around 2 hours with no recharge, overtime this will worsen as the battery ages.
The Compaq Presario R3000 battery has an original cell type, Li-ion chemistry, and a capacity of 4400mAH/ 8- cell. The battery has a life of 11 hours.
Cannot be determined with the information given. If you are asking about on a single charge, the load current must be known. If you are asking about total life of the battery before it cannot hold charge, there are so many variables that any answer is an estimate that may be off by orders of magnitude.
A Compaq nc6000 will run on ac power when the battery is dead. The battery is long lasting but it can be charged by using ac power.
For students laptops are very important, not only for school work but also for recreation. Features that you should look for when selecting a laptop for college include a high processing speed, high memory capacity, long battery life and the presence of USB ports. The top ten recommended laptops include the Acer S3-951-6464; the Toshiba P755-S5395; the Apple MacBook Air; the Gateway NV5387u; the ASUS N53SV-EH72; the Dell Inspiron 14R; the HP Pavilion DV6-2162NR; the Compaq Presario CQ61; the Compaq Presario CQ61; and the Lenovo G570.
yes it emits x-rays and visible light, but dont be alarmed for it to do any damage to your eyes you would need to seat very close and be exposed to it regularly for a long time(years...).
a car battery last for about 3-5 years
As long as the battery is kept charged then it should last 3-5 years.
a panasonic triple a battery last about 4 hours nonstop.
about a year.
Forever.
8hrs
No the battery is built in but should last a long time.