Battery symbol when phone shuts off at 40% battery?

I've been having diffculties with my battery on my phone. This phone is about 3 years old. I got a new battery because the old one was draining so quickly. Now with the new one, my phone will die at 40%, or at 20% if I'm lucky, and 3 symbols will appear. The first one is a plug, the second one is an arrow, and the third one is like a concerned emoji kinda like 😯

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