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Energizer is proud to introduce Power Seal Technology!

You told us what frustrates you with batteries. We listened. Now the alkaline battery you count on every day to power your smoke detectors and alarm clocks is even better.

Introducing Energizer_® MAX_® 9V batteries, now with Power Seal Technology. Our 9V batteries hold their power for 5 years, so you can have assured you’ll always have power you can rely on, whether you’re helping to keep your family safe from fire or carbon monoxide or just wanting to start the day on time. A 5 year shelf life means that you can be confident you’ll always have power when you need it most. that's positivenergy!_™

* When not in use

Product Specs

• Power Seal Technology extends across the full MAX_® product line, so you can be confident you’ll always have power when you need it most.
• Shelf life for MAX_® varies by product. Our AA, AAA, C, and D batteries have a shelf life of 10 years. Our 9V battery has a shelf life of 5 years.

• Reviews & Ratings
• Product Q&A
• Buy Now

Energizer MAX 9V Batteries 4.8 5 185 185

Energizers Rock!! What's not to love about Energizer batteries? The 9-volt is what I chose for my smoke alarm. And the Energizer Bunny commercials are great, too! May 5, 2012

This is a long lasting battery I find that this battery lasts longer than other brand's 9 volt batteries. May 5, 2012

very good I use this for my alarm clock backup and fire alarms May 5, 2012

great battery I have put these in all my smoke alarms, I trust them with my life.They last, they work and I am worry free.... May 4, 2012

smoke alarms i get these for my smoke alarms. that way i am sure they are working. May 3, 2012

great for smoke detectors We use the 9V in our smoke detector and it lasts a long time before we need to replace it. We know the battery is getting low when we hear a squeaking noise spaced about a minute apart. Then we install a fresh energizer and we are good for another year or more. May 3, 2012

9 Volt is a lifesaver... The 9V Energizer Max batteries are a lifesaver.A true lifesaver, this is the only batteries I trust for my smoke alarms in my house.My children are the most importaint thing in my life and I have to use what I can trust and that is Energizer 9V. May 2, 2012

smoke detector always use in my smoke detector because it will always last at least a year May 2, 2012

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(8 Questions : 12 Answers)

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3 answers

Where is the use by or manufactured date on th pack or battery.

Is the 4 digit number on the bottom of the battery the use by or manufactured on date?

5 months, 4 weeks ago

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• Top 100 contributor

Answer: 

on the top side of battery

5 months, 1 week ago

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• Top 25 contributor

Answer: 

on the back

Age: 35-44

Gender: Female

I've used this product for: 11-20 years

5 months, 3 weeks ago

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sweetsforever24

spencer Indiana

 

 

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the battery

Age: 55-64

Gender: Female

I've used this product for: 21-30 years

5 months, 3 weeks ago

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dperry

Chesapeake, VA

 

 

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2 answers

How many joules of potential energy are stored in a 9v basttery?

Age: 18-24

Gender: Male

I've used this product for: 11-20 years

7 months ago

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capn

florence, al

 

 

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• Best answer

Answer: 

Thanks for your question. Below is the answer from from our technical team.

Capacity = 625 mAh under a 25 mA load to 0.8 volts per cell. There is no direct conversion for mAh to joules. However there is a conversion of watt hours to joules (10,000 joules = 2.7778 watt hours). The watt hours can roughly be calculated by multiplying the amp hour capacity by the average voltage during the discharge.

7 months ago

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EnergizerNick

 

 

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• Top 50 contributor

Answer: 

The battery capacity may be influenced by both temperature and discharge rates during use. However, setting those variances aside for the sake of example, you should multiply the 9 volts times the mAh to establish the milliwatt-hours. The sum will equal watt-seconds or Joules.

Age: 25-34

Gender: Female

I've used this product for: 1-5 years

7 months ago

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Mayzee

Illinois

 

 

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what is the current draw capacity of the std 9V battery?I don't mean Amphrs.I mean current rating in mA (milliamps)like 20 mA, 40 mA, 100 mA.Tks, Joh

7 months ago

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• Top 25 contributor

Answer: 

you should ask the learning center

Age: 35-44

Gender: Female

I've used this product for: 11-20 years

5 months, 3 weeks ago

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sweetsforever24

spencer Indiana

 

 

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Answer: 

Hi Lucy, thank you for this great question, I would be happy to assist you. There is not a maximum current specification for alkaline batteries. The time desired and the minimum voltage required at the high current will impact if the battery will meet the user’s needs. For example, if only a few second pulse is required, the battery can deliver significantly more current than if hours of service is needed. A discharge curve for our 522 9 volt alkaline battery could be around 100 mA for continuous drain. Please feel free to contact us with any additional questions or concerns on this at 1-800-383-7323.

6 months ago

by

EnergizerBridget

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1 answer

Do you have a discharge curve you could provide for your 9V alkaline and lithium battery?

5 months, 2 weeks ago

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Answer: 

no, but battery measured 9.46 volts before installing in smoke detector

5 months, 1 week ago

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burned

IDAHO

 

 

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1 answer

How long should a Energizer last in a smoke alarm

Age: 45-54

Gender: Male

I've used this product for: 31+

2 months, 1 week ago

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pickle99990000

Ajax

 

 

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• Staff

Answer: 

Thank you for this great question, I would be happy to assist you. When it comes to smoke alarms and our Energizer 9v batteries, we normally recommend changing them over every 6 months. Though that is just a recommendation, you can leave it in longer without changing it, as long as you keep an eye on the use by date the battery should last for many years.

Thank you for taking the time to contact Energizer
.

2 months ago

by

EnergizerBridget

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1 answer

9v energiser where is the use by. is it use by or manufacture?

1 month, 3 weeks ago

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pedro

 

 

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• Staff

Answer: 

Thank you for this great question, I would be happy to assist you. You will be able to locate the use by date on the battery itself. It is located at the top next to "9v” starts with "03". I do apologize for this inconvenience.

Thank you for taking the time to contact Energizer.

1 month, 3 weeks ago

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EnergizerBridget

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1 answer

Accurate capacity (mAh) of this battery?

Dear sir/mardam,
I would like to know about accurate capacity (mAh) of this battery.
Thanks & best regards.

1 month ago

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MrMind

 

 

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• Staff

Answer: 

Thank you for this great question, I would be happy to assist you. Regarding our Energizer Max 9v battery, it has a 625 MAH capacity.

Thank you for taking the time to contact Energizer.

1 month ago

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EnergizerBridget

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1 answer

What is the amperage in a standard energizer max 9volt?

building a hovercraft and trying to determine how many 9v batteries we need for the power pack using high performance model plane motors.

Age: 35-44

Gender: Male

I've used this product for: 31+

3 weeks, 2 days ago

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confused905

maryland

 

 

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• Staff

Answer: 

Thank you for this great question, I would be happy to assist you. The MAH capacity for the 9v Energizer Max battery is 625. I have also provided you with our PDF spec sheet below for additional information.

http://data.energizer.com/PDFs/522.pdf

Thank you for taking the time to contact Energizer.

3 weeks, 1 day ago

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EnergizerBridget

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