Battery for Samsung Galaxy S21, Upgraded 4900mAh Durable High-Capacity Replacement with Repair Tool Kit, Compatible with SM-G991U SM-G991F

Great item for a great price! Arrived on time. Easy installation. Works great. Comes with everything you need. Longer battery life

Has been less than 30 days and battery has already stopped holding a charge

This was a hidden gem. I don’t find myself needng to replace mobile phone batteries very often, so I didn’t have all the needed tools for a DIY. This kit came with everything needed, most of which are reusable. Worked as it was designed, only $15, above and beyond

Great equipment to install it, but it wouldn't fit my Samsung S21 Ultra, as it said it would.Edit: They contacted me after I gave this review to give me a full refund. Thanks!

Excellent product

El tamaño de la batería no es de 4900 mAh como dice la publicación. En Samsung Members aparece que hay un problema detectado. Al final es cómo la batería normal de 4000 mAh no dura mucho tiempo.

I had the oem battery and used it excessively for 4 years. now I installed this battery and my phone acts the exact same way, after half a day the battery is empty. don't waste your money with this.

That if you pull up a "Battery Replacement" video and do what the video demonstrates the product has the complete tools to get the job done.