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Lenovo ThinkPad T420S Battery
Your Lenovo ThinkPad T420S battery makes your laptop portable so as to work or play where you want. Not all batteries are the same, make sure and double-check the model number and compare it to the one you are going to replace. The more power the battery has, the longer you will be able to use the laptop on a single charge. It is OK to buy a battery with more milliamps, it simply means it is a stronger battery. What is truly important is the connection type and physical size of the battery.
Major clues the li-ion battery will not live much longer
- The laptop does not run longer than one hour while unplugged
- The laptop battery has its case swollen like its about to burst
- The unit does not turn on when it is not plugged in
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