The Samsung A900 is a great phone - a Motorola Razr on steroids. (That is, it's much more durable than the Razr.)BUT THE BATTERY LIFE IS AWFUL!!! You literally have to charge this phone at least two times per day to get any real talk time.NOT ANY MORE! The Bargaincell price was so low, I was skeptical. PERISH THE THOUGHT! I got the battery on time; it was VERY well packaged. It fit the phone PERFECTLY, as did the COVER it came with.I plugged it in and let it charge completely. I then used the phone for THREE DAYS without a recharge! WHOO HOO!!!! BRAVO BARGAINCELL!BY THE WAY - Even though this is a somewhat "thick" battery, it is SURPRISINGLY UNOBTRUSIVE: It does NOT add the "bulk" you might think, looking at its picture. In fact, I think the phone actually looks BETTER with the larger battery. I have a leather Bytech carry case designed for the Razr/A900. It's a tight fit now, but I'm sure the case will stretch much like a new shoe does after it's been worn a few days.DO NOT HESITATE TO BUY ONE OF THESE BATTERIES!!!