An original OnePlus 3 battery looks like this : r/oneplus
One Plus 3 Battery Replacement | Oneplus 3t Replacement Battery - 100% Original High - Aliexpress
5x 3000mAh / 11.4Wh BLP613 Replacement Battery For OnePlus 3 One Plus 3 Three Batterie Bateria Batterij|battery for|oneplus batteryoneplus one battery - AliExpress
100% Original New Top quality BLP613 3000mAh Replacement battery For OnePlus 3 One Plus 3 Three Batteries|Mobile Phone Batteries| - AliExpress