Delta®
Battery Box - Gen 3 Solenoid
Model#:
RP78389
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PRODUCT FEATURES
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.
Documents & Specs
Installation Information
Overall Height (in.) :
7-1/8
Valve Type:
NA
REVIEWS
Rated 1 out of
5
by
Tom in Delray Beach from
I give the battery box a FAIL rating
I was about to try to buy a replacement battery box for this faucet as mine has frequently popped its top and hence no water at the tap. I laughed when I read all of the reviews that all refer to the same problem. I am very surprised that Delta had not redesigned or chosen a different type of battery box as there are many on the market that do not close in the same way. Delta, this is not a good look for a company I have thought of a good one. My solution, wide and long zip tie. It does the job, I just cut it off once a year and change the batteries and put on a new one. I shouldn't have to do this but I didn't want it to beat me.
Date published: 2024-12-19
Rated 1 out of
5
by
MR_J from
Soooo frustrating
Terrible battery box.
Date published: 2024-11-25
Rated 1 out of
5
by
Jmacdaddy12 from
Poor battery holder
Again I’ve taped it put wedges in but batteries keep popping out. Poor workmanship.
Date published: 2024-11-04
Rated 1 out of
5
by
Frank Digs from
Battery holder compartment
Obviously, Per all the same complaints this product is defective, and Delta should replace the product under the lifetime guarantee of the faucet.
Date published: 2024-07-08
Rated 1 out of
5
by
WARREN from
DELTA FAUCET ADDISON TOUCH KITCHEN FAUCET OIL RUBB
MY WIFE AND I BOUGHT THIS FAUCET ON 6/22/2023. BEING IT WAS 406.99 PLUS TAX WE ASSUMED IT WAS A QUALITY BUILD. UNFORTUNATELY IT HAS BEEN NOTHING SHORT OF PLEASANT. THE DOUBLE AA BATTERIES CONSTANTLY SHOOT OUT AFTER THE LID POPS OFF. CHEAP PLASTIC. DO YOURSELF A FAVOR AND BUY A NORMAL FAUCET. THIS SETUP IS GARBAGE.
Date published: 2024-05-03
Rated 1 out of
5
by
Sleepylazybutt from
Faucet is great, battery box sucks.
I am a happy delta fauct customer. I have it all over my house. I have convinced friends and family to spend the extra money on delta products. This is the only negative thing i have to say is this battery box SUCKS! It keeps breaking. Couldnt i just splice the wires and hook it up to another box of a different design?
BTW customer service for Delta is GREAT! They always help out and provide great service.
Date published: 2024-03-27
Rated 1 out of
5
by
Really Fed Uph from
Deserves a Negative -10 Rating!
Have had my Delta faucet several years and as previous reviews state, the battery box was ridiculously designed! For the price of the faucet, Delta should have done the decent thing with a recall and better replacement. Instead, they excuse their inferior product with a nonsensical response of product warranty as you see reading the other reviews.
Date published: 2024-01-06
Rated 4 out of
5
by
Whitewater from
Effective - Sort Of
Since the cap pops off like a jack-in-the-box, I was skeptical that replacing the bottom would fix the issue. But it actually has. I've reinforced it with rubber bands, so that perhaps it will last longer than the first. I removed one star because I'm pretty shocked the design hasn't been improved. This is a pretty obvious failure point for faucet as a whole.
Date published: 2023-08-08
Rated 2 out of
5
by
Beth from
Same issue as others
I have had my faucet for a few years. The faucet is nice, but the battery holder is a pain. I too, have had to duct tape it. Sometimes it pops open with duct tape so I have had to wrap all the way around. This is very frustrating.
Date published: 2023-07-13
Rated 2 out of
5
by
300smiles from
Bad Battery Holder
I've had my faucet for a couple of years or more and love it but hate the battery holder. I have to duct tape it closed. Have you redesigned it yet? Is there another alternative? Is it worth getting a replacement or just keep closing it with duct tape? The problem is if I have house sitters and it pops open, they have no water in the kitchen sink. I hope you have a suggestions.
Date published: 2023-06-30
Rated 3 out of
5
by
mad man from
battry box
the problem I have had with this thing is it doesn't want to stay closed the top cap has the tendency to pop off which makes the faucet unusable need to put rubber bands to hold it on
Date published: 2023-03-19
Rated 1 out of
5
by
Gunner from
Unhappy also
I too have to use duct tape to hold together. Your two tabs are worthless. You need to redesign it. I'm a homebuilder and have used multiple brands. Brizo is the only one with this problem.
Date published: 2022-10-11
Rated 1 out of
5
by
unhappy from
hate having to replace
Batteries do not last 2 years and tape to keep it together is unacceptable. make one with adapter for AC
Date published: 2022-09-05
Rated 5 out of
5
by
TA534 from
This is the Solution.
After installation approximately 4 plus years ago when I changed the batteries this time the battery box would not stay close--it would pop open over and over. Installing the replacement battery box fixed the problem. THANKS
Date published: 2022-02-14
Rated 5 out of
5
by
GRT1 from
Solved problem of battery box separating f
Just installed. This solved the problem where the plastic tabs on the top of my old battery box were bent and the battery box would separate from the wire terminal. Only took a minute to switch. So far it is holding. I will update if the tabs on this unit stop holding.
Date published: 2021-12-03
Rated 5 out of
5
by
Jrandle from
Better than the old one, I hope!
I bought this approximately one week ago to replace the original one. I had had to tape the original one to keep it from coming apart. The new one snapped right on and has held, so far. It was easy to install.
Date published: 2021-07-12
Q&A
My battery box keeps separating from the top solenoid. It wont hold together. Want to buy replacement part but there is no photo. Is the top also included?
My battery box keeps separating from the top solenoid. It wont hold together. it is a very poor product development and I am about to take out the whole faucet because of that. Can I use an adapter instead of the batteries to connect the solenoid to it?
Date published: 2026-05-29
does this product come with the cord attached to it? if not, how do i attach the cord
Hi, Julie!
Thank you for your question. The Delta RP78389 Battery Pack does not include the cord. The cord that connects the solenoid and the battery box will be on the solenoid assembly, itself.
Best Regards,
Rosanna
Date published: 2024-03-28
How do you get this box with 6 AA batteries to stay closed?
Hi Valued Customer,
Thank you for your question, please accept our sincere apology for the inconvenience you are experiencing. We will be happy to assist you in resolving this issue as quickly as possible.
Please feel free to contact us directly for warranty information at 800-345-3358. We are available Monday through Friday from 8 a.m. to 8 p.m. and Saturdays from 9 a.m. to 6 p.m. Eastern Standard Time.
Thank you for being a loyal Delta Faucet customer.
Best Regards,
Themar
Digital Communications Specialist
(800) 345-3358
customerservice@deltafaucet.com
Date published: 2025-03-19
I seem to have the same problem with my battery pack as many other people. I’ve had this faucet for about 6 years and the past few months the top of the battery pack continues to pop off. I’ve used duct tape and that only lasts for a short time.
Hi Valued Customer,
Thank you for contacting Delta Faucet Company!
We apologize for the issues you are experiencing and we are happy to help! We have reached out to you directly to further assist you with this matter.
We appreciate your inquiry. Please reach out directly if you have further questions!
Best Regards,
Kyra
Digital Engagement Specialist
Date published: 2024-09-14
Can you deliver in Canada Ontario
Hi Munir,
Thank you for your question about the Delta Faucet RP78389 Battery Box. I am sorry this information was not readily available, and I am happy to help!
Orders at our website would need an address in the United States. You can purchase Delta Faucet products at many local dealers and internet sites. If a dealer does not carry a specific item in stock, they should still be able to place an order for you. I recommend using the store locator on our Delta website.
https://www.deltafaucet.com/where-to-buy
Please contact us directly if you have any questions or need additional assistance. We appreciate your business and look forward to continuing to serve you!
Best Regards,
Bryan
Digital Communications Specialist
Date published: 2024-03-28
I need the whole battery box and wiring harness.
Hi Alex,
Thank you for your question about the Delta Faucet RP78389.
The solenoid valve, including the battery box cap and wires, depends on the faucet model. See the parts diagram for your model number or see a buying guide here:
https://support.deltafaucet.com/s/article/Touch2O-Solenoid-Buying-Guide
Please reach out with any additional questions!
Best Regards,
Bryan
Digital Communications Specialist
Date published: 2026-08-23
Does this part come with the top attachment? Mine no longer locks into place on the battery box.
Hi Heidi,
Thanks so much for contacting Delta Faucet Company!
No, the RP78389 only includes the battery holder. The lid for the battery holder is included with the solenoid assembly.
Please contact us directly if you have any questions or need additional assistance.
Best Regards,
Nicole
Digital Communications Specialist
Date published: 2024-03-28
I installed my faucet in March and just changed my batteries for the first time a week ago. It is already flashing red to change the batteries. The batteries look a little corroded inside. Will replacing battery pack help?
Hi Valued Customer,
Thank you for your question regarding our Delta Faucet RP78389. Please accept our sincere apology for the inconvenience you are experiencing. We will be happy to assist you in resolving this issue as quickly as possible.
Please feel free to contact us directly for technical information at 800-345-3358. We are available Monday through Friday from 8 a.m. to 8 p.m. and Saturdays from 9 a.m. to 6 p.m. Eastern Standard Time.
Thank you for being a loyal Delta Faucet customer.
Best Regards,
Themar
Digital Communications Specialist
(800) 345-3358
customerservice@deltafaucet.com
Date published: 2024-10-18
Delta Online Pricing
This online price is exclusive to DeltaFaucet.com. The list price may be shown on products offered outside of the Outlet section on DeltaFaucet.com. Strikethrough pricing may be used to show discounts.