Delta RP78389 Replacement Battery Box Power your touch-activated faucet with the Delta RP78389 Replacement Battery Box. As a genuine Delta part, this battery box is specifically designed to work with third-generation solenoids for a perfect fit. This durable and high-quality unit is built for long-term use, ensuring reliable performance for your Delta faucet. It holds six AA batteries (sold separately) and has compact dimensions of 10-3/4" L x 7-1/2" W x 1-1/2" H. Important Note: The lid for this battery box is not sold separately. If the lid is lost or damaged, the complete Delta EP92546 Solenoid Assembly must be purchased as a replacement.