AAAA batteries are the size nobody stocks until you need one. They do not hang next to the AA and AAA pegs at the grocery store. If your Surface Pen quit mid-meeting, it helps to know which shelf to check and which store to skip before you buy. Batteries Plus, Best Buy, Staples, Walmart, Walgreens, CVS, and Amazon all sell this size, though price and stock vary wildly by location. Learning the alternate size codes, and the one substitution that ruins stylus pens, saves you a second trip.
This page contains affiliate links. We may earn a commission at no extra cost to you.
AAAA Batteries Explained: What They Are and Who They Help
A AAAA battery is a 1.5 volt alkaline cell measuring 42.5 mm long and 8.3 mm across, built for slim gear that cannot fit a standard AAA. It sits between a button cell and an AAA in both size and output. Makers also print it as quadruple-A, LR8D425, LR61, MN2500 on Duracell packs, and E96 on Energizer packs, so searching one name alone often turns up nothing.
The format exists because a few devices need reliable power inside a housing barely thicker than a pencil. Typical owners:
- Active stylus pens: the Microsoft Surface Pen for Surface Pro tablets, plus Lenovo and Wacom Bamboo models
- Pen-style flashlight, laser pointer, and LED book light users
- Owners of a Bluetooth headset, slim computer keyboard, wireless mice, or laptop peripherals
- Patients using glucose and blood monitors and other compact medical devices
- Novelty lights, remotes, and a few video game controllers
Stores file this cell under several category names: specialty batteries, miniature alkaline, or even digital camera batteries, which is how Lowe’s lists it. If the main aisle is empty, check the camera peg. Our general battery buying guide covers AA and AAA, most wireless headphones now charge over USB, and anyone shopping for a hearing aid needs a different size entirely.
How to Choose AAAA Batteries: Features That Matter
Four specs decide whether you get dependable power: chemistry, storage rating, pack size, and brand. The rest of the package is marketing.
Chemistry. Alkaline 1.5V batteries are the only practical choice in this format. Lithium versions exist in small numbers and cost more. Rechargeable Ni-MH cells are made, but they are a niche inside a niche and start near 1.2 volts instead of a full 1.5 volt.
Shelf life. Buy packs rated for at least three years in storage. Amazon Basics lists a 3-year shelf life, and Energizer prints a 5-year shelf life on its specialty line. That window matters here, because spares sit in a drawer for years.
Pack size. Cost per cell drops sharply as the count climbs. This is where most buyers overspend.
| Pack size | Typical price | Cost per cell | Best for |
|---|---|---|---|
| 2-pack | $4 to $6 | $2.00 to $3.00 | One device, emergency swap |
| 4-pack | $4 to $7 | $1.00 to $1.75 | A stylus plus a pen light |
| 8 pack | $9 to $12 | $1.10 to $1.50 | Shared office gear |
Brand. Energizer and Duracell own the physical shelves, and Amazon Basics competes online at roughly half the per-cell price. Unbranded imports are cheapest, and the ones buyers most often report arriving close to their expiration date.
Voltage consistency. A good alkaline cell holds a steady 1.5 volt output through most of its discharge curve. Budget cells sag early, which shows up as a stylus that skips strokes. For high-powered devices, pay the extra dollar.
AAAA Batteries Buying Mistakes to Skip
The most expensive mistake here is buying the wrong thing twice. Five traps account for most of it.
Grabbing AAA instead. This cell is 8.3 mm in diameter against 10.5 mm for AAA, and it is 2 mm shorter. Confirm the manual says AAAA before you leave the store.
Paying convenience-store prices. Gas stations and small pharmacies price specialty sizes well above big-box and online rates. Unless the device has to work today, order it.
Ignoring the expiration date. These packs turn over slowly, so old stock is common. Alkaline chemistry gives up a small share of its capacity every year in storage, and a weak cell can push a metering device into a bad reading.
Trusting an unknown marketplace seller. Counterfeit branded packs turn up in third-party listings for this size, usually with soft printing and no date code. Buy from the retailer directly, or from the marketplace’s own first-party listing.
Prying open a 9-volt battery. The trick is only partly real. Some 9V designs stack six cells of this size inside, while others use a flat-plate construction that yields nothing usable. Salvaged cells come out unwelded, unlabeled, and undated.
Which Stores Carry AAAA Batteries
Batteries Plus is the most reliable brick-and-mortar option, followed by Best Buy, Staples, Office Depot, Walmart, Target, Walgreens, and CVS Pharmacy. Stock varies by location more than by chain, so call ahead.
Batteries Plus
The deepest in-person selection, including bulk counts general retailers never carry. Browse their alkaline selection, then reserve for in-store pickup so the trip is not wasted.
Best Buy, Staples, and Office Depot
Office and tech chains stock this size because they sell the pens that use it. Best Buy shelves it with stylus and tablet accessories rather than with household batteries. Micro Center is a strong bet where a store exists.
Walmart and Target
Look at the specialty batteries display beside the standard pegs. Check current availability on their site first. Target shelf stock is inconsistent, so ordering for pickup beats driving over.
Walgreens and CVS
Both drugstore chains keep a small stock near the checkout. The Energizer listing at Walgreens is the pack you will see most, at a dollar or two over big-box pricing. Walgreens is closing underperforming locations, so confirm with the specific store.
Hardware is the last stop. Search the Ace Hardware catalog, or check True Value, Home Depot, and Lowe’s online for nearby stock. If two or three stores come up empty, work the problem in this order:
- Call the nearest Batteries Plus or Interstate All Battery Center and ask them to hold a pack.
- Ask a clerk to check the camera accessories and hearing aid sections, where some stores shelve miniature alkaline cells.
- Order online with next-day delivery, which beats a fourth store visit on time and money.
Best Places to Order AAAA Batteries Online
Amazon carries the widest range of brands and pack sizes, office supply sites keep the Duracell 2-pack in stock most reliably, and component distributors handle real bulk. Online is also where per-cell pricing stops hurting.
Amazon
For the broadest choice of brands, counts, and price tiers, shop the full selection on Amazon. Listings run from the Amazon Basics 4-pack AAAA alkaline option through Energizer AAAA alkaline batteries in 2 count and larger packs. Prime delivery is usually one to two days, and customer reviews make long-lasting performance easy to compare. Read the seller name before ordering.
eBay
Search eBay listings for bulk lots and formats that rarely appear elsewhere. Check the seller rating and printed expiration date.
Big-Box, Office, and Drug Store Sites
Walmart.com, Target.com, Staples, Office Depot, Home Depot, Lowe’s, and the CVS site all list this size even where their shelves do not. Ship to store is the workaround when nothing local shows availability.
Specialty and Component Suppliers
MicroBattery and BatteryJunction keep a deeper catalog of uncommon sizes than general retailers, including high capacity cells and commercial cases. For genuine bulk, Digi-Key, Mouser, and Newark sell industrial packs by the tray at prices retail cannot match.
When to Replace AAAA Batteries
Replace a cell this size at the first symptom, not on a calendar. Battery life here depends almost entirely on how hard the device pulls.
- Stylus pens and laser pointers. Months rather than weeks under normal use. Skipping strokes or a dropped Bluetooth pairing is the first warning sign.
- Pen-style flashlight. A few hours of continuous runtime, because an LED penlight draws far more current than a pen does.
- Metering and medical gear. Swap at the first low-power icon, since a sagging cell can produce a bad reading.
Unused alkaline cells hold their charge for three to five years in a cool, dry drawer, so low-drain gadgets get long life from a single one. Heat is the real enemy: a pack left in a hot car fades much faster. Pull cells out of anything you will not touch for six months, since one leak ruins the contacts.
Household trash disposal is legal in most US states, though California requires recycling. Call2Recycle drop-off points take them free at many hardware and big-box stores.
Our Top AAAA Batteries Picks
Picks were selected on cost per cell, printed storage rating, and stock consistency. Prices reflect a September 2026 check across Amazon and Batteries Plus.
Best overall: Energizer AAAA, 2 Count. The default for a single stylus, pen light, or headset, with a five-year storage rating and the widest retail distribution. Around $4 to $6. Check price on Amazon
Best budget: Amazon Basics AAAA 4-Pack. Roughly half the per-cell price of the name brands, with a 3-year shelf life and favorable Amazon customer reviews. Fine for everyday devices, less convincing for high-performance gear. $4 to $7. See current price on Amazon
Best for heavy use: Energizer AAAA Batteries, 8 Pack. Same alkaline formula at a lower cost per cell, the right buy for an office running three or more gadgets. $9 to $12. View pack options on Amazon
Best reusable set, with caveats: Ni-MH cells with charger. Nothing mainstream exists in this format. You also need a battery charger that explicitly supports the size, since most universal units handle AA and AAA only. $8 to $14 with the charger. Compare sets on Amazon
Start by confirming the manual says AAAA and not AAA, then check whether the device tolerates 1.2 volts. If you need power today, call Batteries Plus or the nearest Best Buy. Otherwise order a multi-pack of alkaline AAAA batteries online rather than paying drugstore prices for a two-cell blister.
Common Questions About AAAA Batteries
What is the other name for AAAA battery?
The size is also sold as quadruple-A, LR8D425, LR61, MN2500, and E96. IEC uses LR8D425 and ANSI uses 25A, so searching a retailer site by letter code often works when the size name returns nothing.
What battery does a Lenovo or Surface pen use?
Most Lenovo Active Pen and Digital Pen models run on one cell of this size, and so does the original Microsoft Surface Pen. Check the barrel for a twist-off cap. No cap means it charges internally over USB.
Are AAAA cells the same as AAA?
No. This cell measures 8.3 mm by 42.5 mm, while an AAA measures 10.5 mm by 44.5 mm. Wedging the smaller one into an AAA compartment usually bends the spring contact. Foil shims sold as adapters cause intermittent contact.
Can you bring AAAA batteries on a plane?
Yes. Alkaline cells this size travel in carry-on and checked bags with no quantity limit for personal use, per the FAA’s PackSafe guidance. Keep spares in a plastic case so the terminals cannot short against keys or a coin.
Why are AAAA batteries so expensive?
Low volume. This format sells a tiny fraction of what AA and AAA sell, so there is no scale to spread tooling and shelf costs across. Expect $2 to $3 per cell in a drugstore blister against roughly $1 online.
Can you recharge AAAA batteries?
Standard alkaline cells are single use and must never go in a charger. Reusable versions do exist, usually rated near 300 mAh against roughly 600 mAh for alkaline, so runtime per charge is shorter and precision gear may reject the lower voltage.
Editorial Note
The wheretobuyguides.com editorial team checked retailer stock and pricing for this guide in September 2026. For more guides on gadgets and accessories, browse our electronic products category.