The condition rating can be 'Normal', 'Replace Soon', 'Replace Now', or 'Service Battery'. Click on the Power section in the list and you’ll find information like the cycle count and condition rating. This is located in Applications > Utilities and can also be accessed by going to the Apple menu > About This Mac > More Info. The fastest way to check if your MacBook is in need of a new battery is to open System Profiler. Looking for iPhone battery replacements? How to tell if you need a new Mac battery The battery in a MacBook, whether it's a MacBook Pro or Air, can be replaced with a new model and many more years use can be had. They are not designed to be replaceable by members of the public, which makes some people think that they are not replaceable at all. The issue comes when it is time to replace the battery. There is nothing that anybody can do to prevent that. But, the battery life will get worse over time. It's normal for MacBook Air users to get 12 hours on a single charge, and MacBook Pro users should get several hours, even if the laptop is a few years old. LiPo batteries are often use in battery electric vehicles, remote-controlled electric models, smartphones and notebook computers.The battery life of an Apple MacBook is something that PC laptop users dream about. The polymer-based electrolytes enable these lightweight batteries to be manufactured in a wide range of designs and shapes, making them very versatile. Compared to other Li-ion batteries, the energy capacity of lithium polymer batteries is slightly lower, but they are more resistant to overcharging. They have a low self-discharge rate, are long-lasting and have a high capacity. Lithium-ion polymer batteries (often abbreviated to LiPo, Li-poly, lithium-poly and LIP) belong to the Li-ion family.

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