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on March 25, 2016
I purchased these for use in my Surface Pro 3 pen. Note that this will also work in the Surface Pro 4 pen. Given that the battery life is about a year, this is more than I will ever need!

That being said, the batteries seem to be performing well. I don't really know what else to say about batteries...
26 people found this helpful
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on March 13, 2017
Seriously, AAAA Batteries? Until I got this funky stylus for my new laptop I had no idea they even sold, no, made this size battery! Anyway, arrived FAST, fray price for 8 batteries & now I have backup (since I have no clue how long they work). I recommend this item! Ply it came in a really cute box.
9 people found this helpful
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on October 25, 2017
I don't know. Maybe I'm a little crazy. But I really like experiments. So I conducted an experiment to compare these batteries vs. the two premium name brand versions. I won't bore you with all the details so here's the abridged version. I took three of the same mini flashlight and put a different battery in each (one for Amazon and one for each of the two premium brands). Then I kept them on to see how long they lasted (at first I thought I'd watch but that wasn't too smart so I set up a camera and then went back and watched to see when each reached the point of being unusable, which I defined as that 'well there's light but it's so dim that who the heck can see' point). Then I calculated how much use I received per dollar spent (this is important - I was more interested in value and not raw length of time). I used the lowest price available on Amazon at the time of the test. The Amazon battery provided 3x more value than one and 2.7x more than the other. Thank you Amazon, both for a great value battery and a few extra bucks so I can buy a candy bar.
12 people found this helpful
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Great price if you have a need for AAAA batteries (MS Surface pro users, you know who you are!)

I have a hard time finding AAAA batteries locally, and I live in a heavily populated area with lots of stores. My only use for one is the digital pen on a Surface pro tablet.

these are a great price and work fine.
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on May 9, 2017
I have no issues with it. I'm using them for my Surface Pen. I bet each one will last me over 6 months. After a month of use, so far the first battery seems to be still full.
review image
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on July 11, 2017
Automatic 5 stars for me because Amazon is like one of the only places that have AAAA batteries. Target, Walmart, Best Buy, Staples all didn't have AAAA batteries for my Surface pen.

HOWEVER, the charge on the battery didn't seem to be that long. The battery that came with the surface pen I used for 3/4 months of heavy use in college. After changing to the Amazon Batteries I seem to have to change the battery every 5~ish weeks. I dunno if that's just a usage thing or if my surface pen is all messed up, but that has been my experience.
Oh also the plastic wrap around the battery will occasionally get unstuck (?). Like the top part of the plastic wrap will come unstuck just a bit and it will snag onto the coil part of the battery bay. That was annoying so I unwrapped the whole thing (BAD IDEA). There was still some adhesive on the batterys outside so the battery got stuck in the pen. It came out after a heart attack, quite a few expletives, a lot of pounding and about 5 minutes with a pair of tweezers and a toothpick.
4 people found this helpful
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First off, Amazon's pricing on these AAAA (4As) tiny batteries are awesome ($0.56 / Count) at the time of writing this review..I got these for Lenovo Active Pen Model GX80K32882 ( kinda sorta wacom pen) and it seems to work just fine. Packaging is simply great. They came in a real cardboard box (tell me which manufacturer does that? these days for a disposable battery?!!) also has multi-language manual Wow! who does that too? These got to be "fresh" as all the batteries have 1.65v which is indicative of the purity of the manganese dioxide used and the contents of zinc oxide in the electrolyte which adds up-to the voltage max of 1.65v. Now, all batteries do self discharge overtime. An initial reading of 1.65v doesn't mean much if that voltage falls off within few days of use.

As it stands, these batteries seems to work just fine...No duds... I will revise this review if things were to change in few months..

Rating with four stars! (I like it)
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Top Contributor: Petson June 24, 2017
I didn't even know AAAA batteries existed! I purchased these for my door sensor for my home security system. The door that they are currently on gets a lot of travel and as expected, the batteries for that door are going bad faster. All of the other sensors use the round flat batteries and are at 100%, these were put in after and after several months usage, now at 63%. All of my sensors continuously report door open/close/active and temperature. Overall these do the job and were a great price, I will purchase again.
2 people found this helpful
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on March 1, 2015
I bought these for a stylus I use with a Dell tablet. I had purchased a multipack of duracell AAAA and had ignored the warnings about the batteries coming loose and not working for long. That was a mistake! This time, I went with the Amazon batteries and they are lasting a long time in this stylus, which tends to burn through batteries at an alarming rate. Very good batteries. They last about as long as the Duracell batteries that I knew were good and fresh, but at a much lower cost!
16 people found this helpful
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on February 9, 2018
It is so difficult to find AAAA batteries in the stores and when you do, they are so expensive. These batteries are not expensive and they are easy to find on Amazon. I use these in my Dell digital stylus. I only wish there were rechargeable versions of these batteries. Buy a storage case (not included) just in case of leaks--all batteries will eventually leak when they are not being used. Or you can use the nice shipping container to store the batteries when not in use.
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