Randomly turned off

Hello, Razer community. Recently I've changed batter on my Razer Blade 14'' (2017 model) because it was inflated (/track-pad-deformation.61665/#post-610949) So, I have NEW battery. No problem when it's plugged-in. Shows 100% charged. However, when I unplug and switch to battery the system shutdowns in ~5-20 minutes randomly. However, the battery indicator still shows I have nearly 80-90% charge. Has anyone seen this problem? And how to resolve it? Thank you.