Aftermarket 1800mAh Extended Battery with Black Door for your Samsung SGH-i607 BlackJack smartphone. Don't leave home without a spare battery. Be prepared to stay in touch when your original battery loses its charge. Extended batteries provide a backup power source and also give you the opportunity to increase talk time. The extended battery door is thicker than the standard battery door. The OEM Pouch WT17200000136 will work with the phone and this extended battery + battery door. Do note that this battery and battery door are excellent replacements for the more expensive original extended batter and door by Samsung. Manufacturer has 6 months warranty on it.