Customer Ratings & Reviews

This is, by FAR, the best battery purchase I have ever made! AA batteries are nice. they can power the average remote and a plethora of toys and games, but they're useless when it comes to smaller remotes and less imposing toys and games, so there's the AAA battery for these occasions. But wait! There's MORE! Just when you thought all of your miniscule electronics needs were covered, Microsoft introduces the Surface Stylus! I was under the impression that these wonder pens were powered by leprechaun magic and childrens' shattered dreams, but NO! Introducing the AAAA (That's right...FOUR A's!) battery!!! What was once only rumors and conjecture in your local D&D Dungeon Master's chatroom, has now been released to the general (if ill-prepared) public! These babies were originally only available to James Bond and a select few NASA scientists to power laser ice cube slicers and the space shuttle, but now, thanks to the generosity of Bill Gates and the Illuminati, you, too, can enjoy the power and versatility of this virtually limitless power source! So break out your dead and/or dying Surface Pens and go find your...um...well, the Surface Stylus is pretty much the ONLY thing I've found that uses these miniature nuclear reactors, but, hey! Imagine the oohs and ahhs at the next corporate board meeting when you are able to use something OTHER THAN your finger or, heaven forbid, some stone-aged relic like a mouse, to select the next Power-Point slide! Power up and Rock on, fellow techno-geeks! The future of humanity, and maybe some REALLY teeny electronics is now in YOUR hands!!!

This battery is a little rare but best buy had it and it works just perfect for my surface pen

They sure are 4a batteries. They battery pretty good.

The batteries were bought for Stylus pen. It works well.

Works great! I had no problems with the batteries!

I bought this battery for my ASUS pen. It is AAAA which is smaller than AAA. It lasts longer than duracell. A good buy.

I needed these batteries for the Google pixel book pen and they don't seem to last a real long time but I guess it depends on how much you use the pen this brand is cheaper than the other brand but still seems a little costly for two batteries but I'm very glad that Best buy offers them for purchase because I like being able to use my Google pixel pen

I have a bamboo stylus that I use to take notes and this battery has lasted throughout the semester

Energizer is always such a trustworthy brand of battery. Anytime I purchase Energizer batteries for my peripherals they last a long time. This time I needed a 4A battery for my Surface Pro pen. I had never seen or used this size of battery and as always I can count on Energizer to make a great product and Best Buy to have it in stock. My pen is now working smoothly as opposed to the trouble it was experiencing with the dying battery.

My drawing tablet takes a certain battery and I couldn't find it anywhere thank God Best buy had it

Energizer batteries are alway good, you don't have to look for a review to purchase it. No complaints.

I bought this to use with an HP pen and the batteries are excellent quality and the right size. Sadly couldn't get the pen to syn but that's a different problem

What else can you say about energizer batteries? They last long however, due to the rarity of the item I feel they were a bit overpriced. Maybe that's the legitimate price, I am not sure, but AAAA batteries are kind of hard to find.

Their battery's! I haven't yet used them since the original battery is still going strong. They say these battery last year's so can't wait to use them. When my battery official dies. Right size for the pixel pen. That's good enough for me.

The batteries in my wife’s favorite toy died, and with her birthday around the corner I wanted to be prepared for the weekend celebration. I have never heard of this brand before but I decided to give them a try because of the cute bunny on the packaging. I popped them in and we gave them a try as soon as the last of our adult children went to sleep and WOW! We tried all three power settings including “The Exorcist” (a known power hog) but these suckers kept going, we couldn’t believe it! We’re never using another brand ever again. Thank you Energizer for a great birthday!

Checked different stores before going to Best Buy since I was in need of a specific type of battery and I was able to find it easily. I needed these for my laptops pen

These batteries are dependable and long-lasting! They keep my small devices powered up for months, and I never worry about them running out unexpectedly. A must-have for gadgets that require reliable performance!

Best Buy in town was the only place to carry this odd sixe AAAA battery which I needed for my surface pen. Would've preferred Duracell but this works just fine and is a lot better than the no name battery the pen came with.

Works like a charm in my Surface Pro Stylus. Seems this was the only place I could find them at the time. Could not locate them in other stores.

Fairly east to set up. Needed a little help from my computer tech friend. You have to set it when NOT to back up as opposed to when to back up. I thought this was a little backwards and needed help to figure it out as I'm not very tech savvy. Overall I'm pleased. Haven't had to check it to see if it is actually backing up but the software indicates it is. A good size for those who want a portable device. I'd recommend it .