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Compaq Presario CQ42 Battery
Your Compaq Presario CQ42 battery makes your laptop portable so as to work or play wherever you fancy. The larger the battery, the longer it will last on one charge. It is OK to buy a battery with more milliamps, it just means the battery will go further on a single charge. What is truly important is the connection type and physical size of the battery. 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.
Major warnings of a declining primary battery
- The laptop lasts way less than it used to while using the battery only
- The battery has its case swollen and looking like it is going to burst
- The laptop will not boot up while unplugged
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