Macbook Pro Early 2011 new battery not charging

Make sure to unplug the charger from the electrical outlet for a minute before plugging it back in. This will reset the chargers internal circuitry. Also try using another electrical outlet.

See if the steps in this Apple Magsafe troubleshooting article help:

https://support.apple.com/en-us/HT203207

If you still have problems, then I suspect you have a defective battery. The quality of third party Lithium-ion batteries is extremely poor even from a reputable vendor such as OWC.

Modern lithium rechargeable batteries can be tricky. It's not simply about charging a bare cell like a NiMH AA. There's a smart battery system with onboard diagnostics and circuitry to communicate with the host device. I believe part of the communications protocol needs to be reverse engineered. It could just be that the system isn't compatible.

jorge269 wrote:

there's something about the SMC that makes me feel it isn't working..

Option Boot the laptop and let it sit at the Apple boot picker menu. Perform the SMC reset. It should power off the laptop.

i read that energy settings reset after you do this, and my adjustments are the same that i changed myself..

No, it does not change the macOS Energy Saver preferences although it will remove any selected Startup Disks. After an SMC reset you should choose your Startup Disk again in the Startup Disk System Preferences.

Also, battery has 30 day warranty, should i go for it?

I haven't had very good luck finding good quality third party Lithium-ion batteries. The quality is very hit or miss. I've even had issues with batteries from OWC which normally sells very good products. Finding a good third party battery is so hard that I will opt for a more expensive official Apple if they are still available which unfortunately is not the case for your model laptop. Even Apple has quality issues with Lithium-ion batteries, but at least they seem to be more reliable for the most part. The only vendors I recommend people use to purchase Lithium-ion batteries are either OWC or perhaps iFixIt.com.

My uncle gave me the computer, and he told me that previously it had the same problem.. that it wont charge the batteries!

This could indicate some other hardware issue with either the Magsafe DC-In Board or with the Logic Board. Or you & your uncle have been very unlucky in finding a good battery.

jorge269 wrote:

HWTech wrote:

No, it does not change the macOS Energy Saver preferences although it will remove any selected Startup Disks. After an SMC reset you should choose your Startup Disk again in the Startup Disk System Preferences.

Okay, now that tells me that SMC is actually not working... i've tried to do that for about at least 50 times! and none told me to choose the startup disk...

Actually I might be mistaken that the SMC reset unsets the Startup Disk since I usually combine the SMC reset with a PRAM reset. I think the PRAM reset is what actually unsets the Startup Disk selection. Sorry about the confusion.

I'm starting to think it might be the dc-in board or the logic board :( as nothing works..

I got this generic battery just while i save some money for the original one, it seems there are still a few i can get here.. but i don't want to buy the original one and still have this same issue

This is a tough item to troubleshoot without a known good battery or an original Apple battery. It would be better if you have access to another laptop or another battery so you can swap them around to see which item has the problem. Personally I lean towards a defective battery since this tends to be the weakest link. If you go for another battery, then I would suggest an OWC battery is your safest bet. I've rarely had to replace Logic Boards or DC-In Boards on these systems except for GPU issues or for liquid damage.