I bought a replacement battery for my Razer Blade Stealth 13.3” (2017). After installing the battery, it worked fine for a while. Then I left it to charge fully and kept it plugged in while the laptop was powered off. When I came back, the battery wasn’t working at all. I also bought a second replacement battery and installed it and the same thing happened; it worked fine, sustained charge and was charging normally. I left it plugged in and then when I tried powering the laptop on it wouldnt do anything. I used a multimeter to check and saw 0V across the terminals of both batteries. With the dead battery connected and the laptop being plugged in for power, the battery icon on the taskbar shows the battery as normal and plugged in and says “(96% available, plugged in)”, but as soon as you remove the charger the laptop switches off and doesnt power on again (on battery). I’m not sure why this happened since laptops have protection from overcharging. The original battery that came with my laptop works fine, no problems with charging (so it’s not a fault in the charger), the reason I wanted to replace it was because its capacity had decreased and wouldnt power the laptop for longer than 20 mins.
I apologize for the long description.
Any information on why this might have happened would be highly appreciated.