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Laptop battery for Y40-70AT-IFI, Y50-70, L12M4P21 7.4V 7400mAh   Product ID:   1003473 Battery Type:   Li-Polymer Battery Voltage:   7.4V Battery Capacity:   7400mAh Battery Color:   black Condition:   original [   ?   ] Special offer  This computer batteries compatible the following part number:   L12M4P21   ,   L13L4P01 batteries   , L13C4P01   ,   LENOVO 21CP5/57/128-2 batteries   ,   121500156 laptop battery This computer batteries compatible the following models:   Y50-70 battery   ,   Y40-70AT-IFI   ,   IdeaPad Yoga 2 Pro laptop battery   ,   ideapad Yoga 2 pro 13 battery   ,   Y50-70AM-ISE(H) laptop battery   ,   LENOVO Y50-70AM-IFI   ,   S41-70-ITH   ,   S41-70AM-IFI battery   ,   Y40-80AT-ISE   ,   S41-70-ISE battery   ,   Y40-80-IFI laptop battery   , ...

When to replace your battery  L12M4P21 ?   Now  your battery  refuses to be recharged at all. Clearly, it's time for a new battery. It's a fact of life that sooner or later, every laptop battery hits old age. Most do well for between 18  and 36 months, depending on how heavily they're used. Then they slip into a slow decline and lose  the ability to take a full charge. The reason? A typical battery pack can be recharged between 300 and 500 times before the chemicals  inside start to wear out, with the result that a battery...