For the price l think it was a good buy--we'll see how it performs 6 months from now. Still fairly early to make a solid review. When I first got the battery it was already charged to 60 % which I believe is a quality control issue done before the battery is sent out from the factory.When I first charged the battery it was having a hard time hitting a 100% charge but after charging overnight the issue corrected itself and has not reoccured. As long as the screen is not left on continually, the battery pretty much levels out as far as battery charge is concerned and lasts all day and l end the day at 50 to 60% charge remaining.

This is the only aftermarket battery I've found that has the embedded near-field antenna AND also meets all the OEM battery specs. It is not a knock-off battery nor one that uses inferior non-matched cells. The price is reasonable.

Battery installed in phone about 5 months ago. After 5 months of phone use, charging/discharging, the battery is still performing as a new battery.

The Ultralast battery brought my 5.5 yr. old Samsung Galaxy S5 back to life. I had ordered an oem Samsung battery online from en ebay retailer prior to this purchase. It arrived & worked no better than my 5.5 yr. old original. They replaced it with another one, same poor result. The only negative factor for the Ultralast is that shipping was delayed a month. Slow boat from China I would guess. Overall, satisfied with purchase.

Order was delayed from original delivery date that was given Then an empty package was in the locker -- had to make a visit inside store to resolve issue Probably not purchasing again from BB