This ELEOPTION rechargeable battery is a perfect replacement for Uniden BT-1001 BT-1004 BT-909 models. The battery has a capacity of 800mAh and a voltage of 3.6V, making it ideal for cordless phones. It is a NiMH battery with a chemical composition that ensures long-lasting performance. The green color and bundle listing make it a great accessory to have for your phone. This battery is a reliable and efficient choice for your cordless phone.