HP Compaq Notebook Power have two main ratings fitted: Volts and Amperes. Because size and weight of the usb ports is limited depth . larger batteries such since car batteries, most agencies show their ratings along with Volts and Mill amperes. 1000 Mill amperes equals 1 Ampere. When choosing a new oven battery, select batteries with more Mill amperes (or Ah). Batteries are likewise rated by Watt-Hours, maybe there simplest rating of just about all. This is found simply by multiplying the Volts additionally, the Amperes together. For case study: 14. 4 Volts, 4000mAh (Note: 4000mAh is of about 4. 0 Amperes). eighteen. 4 x 4. 0 = 57. 60 Watt-Hours Watt-Hours signifies the actual needed to power one watt understanding hour. This HP Compaq Laptop or pc Battery can power 57. 60 watts maximizing hour. If your pc runs at 20. 50 m, as an example, this Battery could power your laptop for just two. 8 hours. 133 Watt External Laptop or pc Battery Charger Runtime As much 10Hrs Upgrade my HEWLETT PACKARD Compaq Laptop Battery from Ni-MH to Li-ionNi-Cd, Ni-MH and additionally Li-ion HP Compaq Computer Battery http: //www. lapbattery. com/ are all fundamentally distinct from one another and can not be substituted unless the notebook may be pre-configured from the manufacturer to accept dozens type of battery chemistry. Please refer to your manual to know which rechargeable battery choices the laptop device helps or use our HEWLETT PACKARD Compaq Notebook Battery Finder above to seek out all the compatible Laptop Battery for the device. It will automatically list many of the battery chemistries supported from your specific device. If your device does help you to upgrade the battery from Ni-MH to Li-ion, you should typically get longer work times. For example, if your main laptop uses a NI-MH battery which can be 9. 6 Volts, 4000mAh and therefore the new Li-ion laptop power is 14. 4 Volt, 3600mAh, you will obtain longer run time when using the Li-ion battery. Example. Li-ion: eighteen. 4 Volts x 3. 6 Amperes = fifty one. 84 Watt HoursNi-MH: 9. 6 Volts back button 4 Amperes = 37. 4 Watt HoursThe Li-ion is stronger there are longer run time. Any question please feel unengaged to contact with me. http: //www. lapbattery. com/