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Acer Extensa 4120 Battery
Your Acer Extensa 4120 battery makes your laptop portable so as to work or play wherever you fancy. Because no battery is the same, make sure and double-check the part number of the new battery and compare it to the one you are going to replace. Getting a battery with a higher amp rating is OK, as it signifies that the battery can last for a longer period of time on one charge. What is important is the physical size of the battery as well as the connection. The more power the battery has, the longer you will be able to use the laptop on a single charge.
Red flags to watch for in a failing Acer battery
- The laptop lasts way less than it used to while unplugged
- The unit refuses to turn on while not connected to the AC adapter
- The laptop battery is puffed up like its about to burst
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