Galaxy S21 Ultra Battery, (Upgraded) MAXBEAR 5500mAh 3.85V Li-Polymer Replacement Battery EB-BG998ABY for Samsung Galaxy S21 Ultra 5G SM-G998B/DS SM-G998U with Repair Tool Kit

I CHARGED IT OVERNIGHT AND IT SHOWED 100% MADE 2 PHONE CALLS FOR 15 MINUTES TOTAL AT IT DRAINED TO 83% AFTER SITTING ON MY DESK FOR ABOUT 3 HOURS ON STAND BY IT DRAINED TO 73%. I ASK FOR A REPLACEMENT AND WAS GIVEN NO PROBLEMS 'ILL HAVE IT BY MONDAY. DON'T GET ME WRONG IT'S NOT THE COMPANY THAT SOLD IT TO ME IT'S JUST A FAULTY BATTERY. BUT I WILL SAY THERE CUSTOMER SERVICE IS GREAT NO PROBLEMS WHAT SO EVER. AT THIS TIME I'M STILL GIVING THEM 5 STARS. I'LL POST ANOTHER REVIEW AFTER I CHARGE THE NEW ONE. ON MONDAY. I RECEIVED MY REPLACEMENT IN 2 DAYS AND CHARGED IT OVER NIGHT AND IT WORKS GREAT.

got the battery replaced and phone and battery are charged.

Bought one "MAXBEAR (Upgraded) 3800mAh 3.85V Li-Polymer Battery" for my Galaxy S7. Came w/ 60% power. Used it until phone turned off. Plugged in to wall outlet w/ my original Samsung charger. Needed FOUR FULL DAYS to fully charge. AND I had to keep unplugging it and plugging it back in as it kept stopping the charge. Used phone until battery down to 5%, then it would not accept a charge at all. Tried different chargers, different outlets, but battery was dead and would no longer recharge. I traded it in for another of the same battery. Started off the same, also needed four days to charge first time, then on second charge attempt overnight, it didn't increase charge percentage at all (although the light indicated it was charging.) Unplugged from the charger and plugged in again, then after four hours the charge increased 10%. After the first battery wouldn't recharge, I emailed the seller directly with a simple outline of my problem asking for specific input and was sent an exact copy of the text used on their seller page w/ a general description of how to charge a battery. So, a typical garbage Chinese knockoff product and common Chinese dealer selling to an American market who won't bother using a translator to thoughtfully respond to their customers' genuine concerns.

Saved me $1299.. decided to keep mybs23u, instead of buying a s26

I can't seem to get a link to the seller to ask, but it seems to me that the kit should include a seal (or sealer) for reinstalling the rear cover. Mine did not. That leaves my phone exposed to dirt and moisture. I don't really want to return it, because the install is otherwise done and it's working, though I may resort to that. Other than that, the install was pretty easy and the battery is functioning.

The original battery on the LG K20 Plus is only around 2700mAh while this one is around 3000mAh.... 300 mAh doesn't sound like much of a difference, but it can certainly hold a charge and for a longer time than the original battery.... Then again my original battery was more or less draining at an abnormal rate so I figured it was time to change it to this one which can hold it's charge for quite some time. My assumption though is that these batteries aren't made to last forever and they will eventually start to deteriorate thus causing it to lose its charge, thus have to keep buying new onee. Only time will tell how long it lasts but so far so good. I guess the cons are that the increased mAh will defently require to take a longer time to actually charge it. In any case it is defently superior to the default 2700mAh battery.

Honestly really easy to install and watch YouTube video and you have everything you need..if you have a heat gun or pad warmers it makes the face screen come off real quick

Battery has great life. Perfect fit and easy enough installation. Brought functionality back to my s21 ultra 5g. Overall very pleased with this purchase. The glue they give you doesn't fit the application perfectly but its still usable and gets the job done.

Excelente producto

Tengo poco tiempo pero hasta el momento todo bien. Si se nota la diferencia incluso funciona un poco mejor el celular. Tiene todo lo necesario para instalar la bateria.