How Much To Charge Laptop Battery. We must differentiate between cell and battery because they have very distinct definitions in electrical engineering. After purchasing a new laptop computer or battery for your laptop we recommend the battery be charged for no less than 24-hours.
NO you cannot charge your 12V AGM battery directly with a 19V Laptop power supply. For instance a 60-watt device used over 4 hours needs 240 watts. Avoid discharging your laptop completely after charging it.
Therefore some computers allow you to set a charging threshold that will only charge the battery once it falls below a certain level.
The laptop power supply IS NOT a battery charger it is a fixed voltage SMPS power supply. The best thing you can do is try to keep the battery level between 40 percent to 80 percent. Small laptops such as notebooks generally have a 30-50Wh battery capacity costing 1 to 15 cents to charge. In Windows 10 find out how much battery power is left by clicking the battery icon in the Windows Notification Area in the bottom-right corner of your screen.
