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Ansmann AA 2850 mah 4pk Slimline Version

4.2 4.2 out of 5 stars 225 ratings
$24.99 $6.25 per Batteries
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4-Pack
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Purchase options and add-ons

Number of Batteries 4 AA batteries required. (included)
Brand Ansmann
Battery Cell Composition NiMH
Recommended Uses For Product Camera
Unit Count 4 Batteries

About this item

  • Strongest and longest rechargeable batteries on the planet.
  • Great for wireless mics, digital cameras and more.
  • Engineered for long run-time and high recycles.
  • Why use alkaline batteries when you can get up to 1000 recycles with this high capacity rechargeable battery?
  • Cost a little more than consumer grade, but yields up to 1000 recycles instead of a 100

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Climate Pledge Friendly Climate Pledge Friendly

Frequently bought together

Ansmann AA 2850 mah 4pk Slimline Version
$24.99 ($6.25/Batteries)
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ANSMANN 9V Rechargeable Batteries 300mAh pre-Charged Low Self-Discharge NiMH 9 Volt Battery 9V Battery (2-Pack)
$27.99 ($14.00/Count)
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Ansmann Energy 4 Universal Plug-in Charger for AA, AAA, and 9V
$49.99
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From the manufacturer

Ansmann AA 2850 mah Slimline

One of the excellent choice for dimension sensitive devices

Long run-time in high-drain devices such as wireless mics, in-ear monitors, flash units, ZOOM recorders, etc

Slimmer than standard 2850 by .15mm

Some wireless units are particularly tight for rechargeable batteries - such as Shure UHR. These cells were designed to accomodate dimension sensitive devices.

Pro-grade, for high demand.

Ansmann batteries are used by professional production companies for Katy Perry, Rob Thomas, Cirque du Soleil, Blue Man Group, Nine Inch Nails and thousands of schools, churches, theaters and more.

  • High cycle stability
  • High power
  • Fast rechargeable
  • Up to 1000 recycles
  • No memory effect
  • 2 year replacement warranty
  • Pro-grade vs. consumer grade

Bundled For Maximum Savings

8 Pack

12 Pack

16 Pack

20 Pack

Best Value!

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Price$24.99$22.99-12% $14.99
List: $16.99		-11% $22.28
List: $24.99		$10.84$27.99
Delivery
Get it as soon as Saturday, May 4
Get it as soon as Saturday, May 4
Get it as soon as Saturday, May 4
Get it as soon as Saturday, May 4
Get it as soon as Saturday, May 4
Get it as soon as Saturday, May 4
Customer Ratings
4.24.2 out of 5 stars225
4.54.5 out of 5 stars43
4.54.5 out of 5 stars18,575
4.74.7 out of 5 stars11,294
4.74.7 out of 5 stars227,256
4.24.2 out of 5 stars794
Battery life
3.3
4.8
3.8
4.6
3.8
—
Value for money
2.8
4.0
4.1
4.3
3.9
—
Longevity
2.1
4.1
3.9
4.4
3.6
—
Remote Control
—
—
4.0
4.5
3.9
—
Durability
—
—
3.9
4.7
4.1
—
Sold By
Horizon Battery
Horizon Battery
EBL-Stores
Amazon.com
Amazon.com
Horizon Battery
capacity
2850 milliamp hours
2850 milliamp hours
2800 milliamp hours
950 milliampere hour
—
270 milliamp hours
battery quantity
4 aa
4 aa
8 aa
4 lithium ion, 4 aa, 4 product specific
20 aa, 20 aaa
2 product specific, 2 9v
voltage
1.2 volts
1.2 volts
1.2 volts
1.2 volts
1.5 volts
—
reusability
Rechargeable
Rechargeable
Rechargeable
Rechargeable
Single Use
Rechargeable
compatible devices
Camera
Camera, Remote
Toys, Camera, Torch, Shaver, Radio
Solar
Clock, Toy, Controller, Torch, Camera
Alarm, Clock, Toy, Torch, Camera, Remote

Product information

Warranty & Support

Product Warranty: For warranty information about this product, please click here

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Ansmann

Ansmann AA 2850 mah 4pk Slimline Version

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Product Description

ANSMANN Super High Capacity Rechargeable AA Batteries 2850mAh NiMH (Slimline)
High current for devices with high power consumption
Professionals and frequent users like to use highest capacity batteries. These batteries are thus ideal for professional applications with high energy demand, such as digitalcameras, flash equipment, medical equipment etc. These high-capacity batteries can supply maximum power within a short time. The self-discharge is irrelevant in this respect.
Benefits the environment and your wallet
NiMH batteries can generally be used wherever disposable batteries are used. This allows you to save money and protect the environment.
High safety standards and good cycle stability
The batteries naturally meet the currently applicable EU Directive and the highest standards of safety and durability. Thanks to the excellent cycle stability, theNiMH cells can be recharged up to 1000 times.
Large temperature range
The batteries can be used at temperatures from -20° C to + 50° C. The cells are successfully tested by TÜV Saarland for compliance withelectrical, thermal, geometric and safety-related requirements.
Fast charging + No memory effect
The batteries can be charged with a high charging current, thereby very short charging times are possible. Thanks to the latest battery technology, the memoryeffect is ruled out even after repeated partial charges.

Customer reviews

4.2 out of 5 stars
4.2 out of 5
225 global ratings

Customers say

Customers like the performance of the battery. They say it works great in their application and is satisfied with the performance. However, some customers are not happy with the size, saying the batteries are over sized to other batteries in diameter. Opinions are mixed on value and charging.

AI-generated from the text of customer reviews

14 customers mention14 positive0 negative

Customers are satisfied with the performance of the battery. They mention that it works great in their application, and appreciate not having to recharge them as often. Some say that the batteries work well in their church setting, and with their Shure wireless microphones. They also say that they work well with Apple keyboards and mice, and are a great product for using professional wireless equipment for audio.

"extreme performance. Very short recycle time for digital camera speedlight / flash.Extremely versatile...." Read more

"...This is a great product for using professional wireless equipment for audio. I did a lot of research before I decided to buy Ansmann...." Read more

"...on how much you actually use them, but over all I'm satisfied with the performance, they do not take that long to charge, and I have not had a..." Read more

"...to to eneloop pros and like them much better as they have very consistent performance." Read more

51 customers mention34 positive17 negative

Customers are mixed about the charging of the battery. Some mention that they hold a charge very well, do a good job, and extend their lifespan. However, others say that they seem to lose charge over time, drain them unusually fast, and are totally unusable.

"...These lasted WELL over a year before we had to replace. And that was more out of wanting 7 hr. continuous battery life." Read more

"...Energy8+ chargers also reconditions rechargeable batteries and extends their lifespan - and helped us bring back some old rechargeable batteries..." Read more

"...I do not care for the competitor, eneloop. Simply not fast enough for the shooting I do." Read more

"The Ansmann batteries are usually great. I bought a 12 pack of them and 11 are fine in my Ansmann charger...." Read more

21 customers mention13 positive8 negative

Customers are mixed about the value of the battery. Some mention it's well worth the initial investment, while others say it'll waste your money.

"...This is the BEST rechargeable product with production quality...." Read more

"Way too expensive for the charge. I tested it at the same charge as a much less expensive 2800 battery" Read more

"...Saves a bunch of money using them in my home theater remotes, flashlights and photo equipment." Read more

"...Well worth the initial investment." Read more

15 customers mention4 positive11 negative

Customers are dissatisfied with the size of the battery. They mention that it's not slim, it'll not fit in their wireless pack, and it'd be misleadingly large.

"...batteries are just slightly wider/thicker - the diameter is slightly larger than alkaline AA's, which is fine for most wireless but our Shure UR4D..." Read more

"...They are good batteries, but just not skinny as is claimed in the copy." Read more

"These batteries fit snuggly into our Audio Technica handheld condenser microphones and our AT Body Pac mic...." Read more

"...They Lliterally would not fit 4 a breast in the rotary laser head ...which oddly was also made in Germany like the battery manufacturer." Read more

3 customers mention0 positive3 negative

Customers are dissatisfied with the quality of the battery. Some mention that it has failed after only 4 months, and others say that it just flashes an error and won't accept a charge.

"...However, the 12th one just flashes error and will not accept a charge...." Read more

"i was able o recharge these 4 time before they all failed. Do not waste your money." Read more

"...I purchased eight of these early Feb, now 4 1/2 months later, one has already failed. I'm not impressed." Read more

eight of them exploded in one of my good (MAHA) chargers
1 Star
eight of them exploded in one of my good (MAHA) chargers
Although the batteries say they're ok for fast charge, eight of them exploded in one of my good (MAHA) chargers. Charger is dead, and all 8 batteries are garbage. Email to the manufacturer has gone unanswered.The plastic covers split, and written on the battery underneath is 1.2v 2500mAh. These batteries are NOT the 2850 as advertised.They are also 14.3mm - 14.37mm wide. Not exactly 'Slim'
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Top reviews from the United States

Pacman
5.0 out of 5 stars Best rechargeable out there for wireless mics
Reviewed in the United States on September 20, 2015
Size: 12-PackVerified Purchase
We have been using Ansmann batteries in our wireless systems for over 5 years now - these get used a couple of days a week and are on the charger between rehearsals and performances. We replace these every 1-2 years which is usually when we see them start to loose their charge faster when in the mics. Still a huge savings over alkalines even if we replace every year. We have only had one battery failure over the years and Ansmann support was great and replaced it immediately. The only issue we have run into is that these batteries are just slightly wider/thicker - the diameter is slightly larger than alkaline AA's, which is fine for most wireless but our Shure UR4D packs and mics are a very tight fit. Even these "slimline" have issues. That is the only complaint I have about these batteries. If you have wireless you use weekly/daily, you owe it to yourself to get these batteries. Hey, if it is good enough for Cirque du Soleil, it is good enough for us.
2 people found this helpful
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Dan the Man
5.0 out of 5 stars Slim Line powerhouse!
Reviewed in the United States on May 12, 2015
Size: 12-PackVerified Purchase
These batteries were nearly fully-chareged already when received. I've used several sets of the Ansmann 2850s in my power-hungry camera for th epast 4-5 years and two sets last at least two years (at which point I use them in a less-hungry cmera) of near-daily use, swapping them out for charging as needed, with one set kept on maintenance-charge while the other is in-use so I'm never 'waiting' for charged batteries.

I decided to try this "slim line" version for the first time -- not because of the 0.15mm smaller diameter (not an issue with my cameras tho sometimes an issue in some professional transmitting microphones) -- since they are fully rated at 2850mAh and for high/continuous current drain applications. Whereas the 'regular diameter' Ansmann 2850s might only be 2650 (if you read the fine print), this slim-line 'pro' version is fully rated at 2850mAh and tho I'm still using the first set I charged, so far they have lasted for three days [edit: 5 days now] of daily intermittant use and the camera still shows as full-charge, so I'm satisfied these are a good choice. If that turns out to not be the case longer term, I'll update this review, but I fully expect these to be up to he task.

Btw, I've tried other 'big-brand'-name and also some lesser known 2900s and 3000mAh NiMh in the past and none could keep up with these Ansmanns, especially in cold weather and that is based on the regular 2850 (2650 min) Ansmanns I've used. There is clearly a rating game with NiMh batteries as borne out by controlled test reviews I've read but these Ansmann Slim Lines seem to be one of the few (and possibly the only 2800+rated) ones that actually test and perform as stated. It seems that ones rated at below 2500 are more likely to actually meet or come close to meeting their ratings but I am not aware of any rated at/over 2700 mAh that consistently do, except for these. If I ever find any I will surely try them since actual performance is what matters to me, not bogus marketing numbers that might occasionally be true under certain unrealistic conditions. In short these Ansmanns do consistently deliver in the real world.

As with all NiMh, their performance (total true capacity and idle charge-bleed rates) do begin to decline in short order but the Ansmanns have proven satisfactory even after two full years of daily use -- when they get relegated to a less hungry camera (for another 12-18 months). I see lots of talk of good experience with Enerloop but, while I like the Enerloop idea, they simply do not have anywhere near the capacity/performance of these -- even their highest rated.

In short these have become my standard-bearer NiMh battery and if another comes along that should prove better I'll be the first to switch -- real-world reliable performance is all that matters to me....
12 people found this helpful
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Daniel P MacPhail
5.0 out of 5 stars Great for Wireless Microphones!!
Reviewed in the United States on September 5, 2015
Size: 4-PackVerified Purchase
Love love love these! We use them for our wireless microphones at church. We decided to make the switch away from Duracell Procell batteries based on cost.

This is the BEST rechargeable product with production quality. I HIGHLY recommend getting the slimline as we order the non slimline and it didn't fit in a couple of our wireless mic's. Even so keep in mind that it did not work on a couple of our model wireless that we have but that is not the batteries fault. Some wireless don't respond well to rechargeable batteries in general.

These lasted WELL over a year before we had to replace. And that was more out of wanting 7 hr. continuous battery life.
4 people found this helpful
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L.E.M Photography
4.0 out of 5 stars These are the fastest and best I have found on the market
Reviewed in the United States on January 18, 2018
Size: 12-PackVerified Purchase
I'm a Professional Photographer and currently have 53 Ansmann batteries for my Wedding setup. These are the fastest and best I have found on the market. The ONLY Downfall is that try don't hold a charge long. I fully charge all of them the day prior to Wedding Day, and by shoot time the batteries that were charged first (the day prior) already have lost 1 bar of charge. In saying that, the refresh rate on these bad boys are super fast, nothing else compares. I can flash consistently. I go through a ton of batteries and still choose to stick with Ansmann. I do not care for the competitor, eneloop. Simply not fast enough for the shooting I do.
5 people found this helpful
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J. Roesch
5.0 out of 5 stars best rechargeable batteries, ultra performance; optimal for digital photography
Reviewed in the United States on December 8, 2017
Size: 20-PackVerified Purchase
extreme performance. Very short recycle time for digital camera speedlight / flash.
Extremely versatile. We completely switched to ANSMANN rechargeable batteries to replace all single use batteries in our household (for most devices we use cheaper 2500mAh versions). Using Ansmann's PL8 and Energy8+ chargers also reconditions rechargeable batteries and extends their lifespan - and helped us bring back some old rechargeable batteries which barely held their charges any longer when using standard chargers.
3 people found this helpful
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Diane
1.0 out of 5 stars One battery was defective in 12 pack
Reviewed in the United States on September 26, 2018
Size: 12-PackVerified Purchase
The Ansmann batteries are usually great. I bought a 12 pack of them and 11 are fine in my Ansmann charger. However, the 12th one just flashes error and will not accept a charge. Amazon offers no other way to contact them to try to replace one battery so I'm going to be forced to return all of them as defective. It's a shame so I really hope they read this and contact me before I do.
4 people found this helpful
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Josh
5.0 out of 5 stars "Slim Line" best choice for wireless microphones and IEMs.
Reviewed in the United States on February 4, 2015
Size: 4-PackVerified Purchase
I purchased these to use for wireless mics and wireless In Ear Monitors (IEM) that we use in church. I am glad that I bought the "slim line" because if the batteries were any larger in diameter, the batteries would have not fit the transmitters of the IEM. This is a great product for using professional wireless equipment for audio. I did a lot of research before I decided to buy Ansmann. If you plan to go to rechargeable batteries in wireless mic/IEM, these "slim line" are a great choice. I will be purchasing more in the future.
2 people found this helpful
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Top reviews from other countries

bruce nicol
5.0 out of 5 stars good value from a proven manufacturer
Reviewed in Canada on July 3, 2019
Size: 20-PackVerified Purchase
great value, good power, ANSMANN makes great batteries.
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gus
5.0 out of 5 stars Genial
Reviewed in Mexico on January 13, 2019
Size: 8-PackVerified Purchase
Exelente funcion
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Sylvain
5.0 out of 5 stars 👍
Reviewed in Canada on December 23, 2018
Size: 16-PackVerified Purchase
👌
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Jason J
5.0 out of 5 stars These batteries work great and hold a charge for a long time
Reviewed in Canada on May 10, 2018
Size: 8-PackVerified Purchase
Don't let the "Slim Line" labeling freak you out. These batteries work great and hold a charge for a long time. Yay, reduce battery waste and save money too.
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Buddie
5.0 out of 5 stars great
Reviewed in Canada on December 14, 2018
Size: 8-PackVerified Purchase
last good
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