Galaxy S21FE Battery,Upgraded New Battery Replacement for Samsung Galaxy S21 FE 5G SM-G990U|SM-G990B with Professional Replacement Tool Kits

Great product that is simple enough to install if you're looking for better battery life! I would recommend this product and would use it again.

Cell phone replacement battery with all tools to do the job for my specific phone! I am thrilled to get this. But, the whole set lacks any instructions, or even a tip on how to do the replacement! Bummer. Down one star because the battery is for a specific phone (or group of them).I am not deterred, as I likely can find instructions and a video on YouTube, or by letting an AI site locate instructions. It might even be possible to get instructions from the Samsung website, or a tip or two from a 800 number call to Samsung.I'll see, but not right now, because my 200+ g internal storage phone is still relatively new (two years) and I see no hint of any problems with the battery. Nonetheless, I anticipate that as a phone ages availability of replacement batteries will decline, so I am prepared!I am curious about use of the term "upgraded battery replacement." You mean that this lithium battery is not expected to explode or start burning, as some such batteries did a few years back??