Aftermarket battery won't make my phone turn on

I recently got a PowerBear extended battery 6500Mah LG G3 and everything went well until I replaced the battery to the aftermarket battery. I tried to turn it on but nothing worked. I did a lot of troubleshooting solutions but none worked. When I plug in my old battery, Everything is fine and fast to boot up, unlike the aftermarket. I'm looking for people who has had a similar and/or same problem that can help me find a solution to this. I read in the internet that it might be the phone not reading it as its official battery theerefore not letting it do anything, but i found that rarely, when I was troubleshooting, The phone shows the percentage of the battery but just when I got my hopes up , I tried to power on , but it went back down to a black, unresponsive screen. Any help is appreciated