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Question: I've had my notebook for almost a year now and I just recently used express charging mode with OneKeyOptimizer and after that my battery meter is always wrong. It stays at 100% and drops to 0 quick. I have tried installing, and un-installing drivers (ACPI,Lenovo Power, etc.) and Disconnecting the battery from the motherboard. I also tried upgrading the BIOS and drivers, nothing.  Callibration using OneKey and Gauge reset using power manager and no luck either. I finally tried manually resetting the gauge (fully charging and discharging) and it now drops to 0 more slowly and stay on 0 for 4 or more hours. The battery life is very good (weird!). So I have three questions now: 1. Is there something I have not tried except re-installing windows? 2. Why did it happen when I only used express charging mode? 3. There is no OneKeyOptimizer or Power manager or any type of standard battery gauge software for lenovo y40-80 for windows 10, Is there going to be one soon?...

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...