Button batteries run more of your life than you probably realize: the watch on your wrist, the thermometer on the nightstand, the scale in the bathroom, the small remote that controls the ceiling fan. The AG4 designation is just one name for a tiny silver-oxide coin cell also sold as SR626SW, 377, and 376, and shopping for it gets confusing fast because the same cell shows up under half a dozen labels. This roundup sorts through the noise so you can pick the right pack for the drawer, the toolkit, or the gift stack without overbuying.
An Overview Of The Picks
An Overview Of The Picks
CR2032 Battery for Car Key 3V Lithium 10 Pack
Fuspower SR626SW Watch Batteries AG4 10 Pack
Fuspower 376 377 SR626SW Batteries 40 Pack
LiCB 40 Pack SR626SW Silver Oxide 1.55V
Cotchear 10pcs AG4 LR626 1.5V Alkaline Cells
PKCELL SR626sw Watch Battery 10 Pack
Fuspower SR920SW Watch Battery 371/370 10 Pack
Fuspower LR44 1.5V Alkaline Coin 10 Pack
Fuspower SR626SW AG4 Battery 100 Pack
Fuspower LR1130 1.5V Alkaline Batteries 10 Pack
More On The Choices That Made The List
Fair warning right up front: the CR2032 is not a true AG4 equivalent. The two cells look similar at a glance but live in different sizing families, and forcing one into the other’s slot will not power the device correctly. Where the CR2032 shines is the broader world of coin-cell gear that surrounds your AG4-using watches and meters, namely key fobs, garage door openers, and small trackers.
The 3V lithium format delivers a higher voltage than the 1.5V AG4 family, so this pack earns its place in the drawer next to the smaller button cells for the day a remote or fob dies. The ten-count sleeve also keeps spares affordable for the glove box.
What Stands Out
- Higher 3V output handles remote, fob, and tracker loads without dipping early in life.
- Ten-pack sleeve fits neatly in a kitchen drawer or glove box.
- Lithium chemistry holds voltage steady across most of its discharge curve.
Honest Caveats
- Not a true AG4 substitute; verify your device’s required code before buying.
- Higher voltage can damage devices designed specifically for 1.5V button cells.
Feature Snapshot
Made For
Drivers stocking spares for key fobs, garage openers, and small Bluetooth trackers that need a CR2032.
Swap It Out When
The Fuspower SR626SW Watch Batteries AG4 10 Pack is the smarter grab if your watch or meter actually calls for an AG4-equivalent code.
If you have ever stared at the back of a watch trying to remember whether you needed a 377, a 376, or an LR626, this pack removes that confusion. The label cross-references the whole AG4 family so you can swap without a magnifying glass or a phone full of battery charts.
The ten-count format suits first-timers who want a couple of spares without committing to a 40- or 100-pack. Shelf life is quoted at roughly two years, which lines up with how often most households actually need a button cell replacement.
Bright Spots
- Cross-reference list covers AG4, 377, 376, SR626SW, LR626, and a handful of related codes.
- Ten-pack keeps the price low for a small first purchase.
- Compact cells slot into watches, thermometers, calculators, and small toys.
Things To Consider
- Alkaline chemistry, not silver-oxide; expect slightly less stable voltage in precision watches.
- Only ten cells per pack; not the right sleeve for stocking a busy repair bench.
Right Fit For
Anyone replacing a watch or thermometer battery for the first time and wanting a no-fuss multi-code sleeve.
Look Elsewhere When
The LiCB 40 Pack SR626SW Silver Oxide 1.55V is a better match if you run precision quartz watches that benefit from silver-oxide chemistry.
Forty cells sounds like overkill until you start counting the gadgets in your house that eat them: watches, kitchen timers, bathroom scales, fitness bands, laser pointers, the kids’ talking books. A 40-pack turns battery replacement from a recurring errand into a once-a-year refill.
The labeling leans on the same AG4 cross-reference as the smaller Fuspower sleeve, so you don’t need to memorize battery codes to use them. Stable voltage output and a quoted two-year shelf life keep the spares usable long after the package goes back in the drawer.
The Helpful Details
- 40-count sleeve covers a year’s worth of small-device swaps in one purchase.
- Cross-reference covers AG4, 377, 376, SR626SW, LR626, and related codes.
- Two-year shelf life fits a household that replaces cells only occasionally.
Some Limits To Know
- Alkaline chemistry, not silver-oxide; fine for toys and timers, less ideal for precision watches.
- Bulk count is wasted if your household only needs two cells a year.
Feature Snapshot
Built With In Mind
Busy households where watches, timers, scales, and small electronics all draw from the same battery drawer.
A Better Fit Elsewhere
The PKCELL SR626sw Watch Battery 10 Pack is a smarter choice if you prefer smaller restocks and tighter per-cell sealing.
The honest read on watch batteries is that chemistry matters more than most people think. Silver-oxide cells (the kind LiCB uses here) hold their voltage on a flatter curve than alkaline alternatives, which translates to a watch that keeps accurate time longer between swaps.
The 1.55V rating is the standard for the AG4/SR626SW family, and the pack is graded and tested before shipping. For anyone who owns more than one watch, the 40-cell count becomes a small investment in not thinking about batteries for a long stretch.
Practical Pluses
- Silver-oxide chemistry keeps voltage stable across the cell’s life.
- 1.55V output matches precision watch and meter requirements.
- 40-count pack covers multiple watches and small devices in one go.
- Tested under stated quality-control standards before packaging.
Trade Offs
- Higher per-cell cost than alkaline alternatives like the Fuspower 40-pack.
- Overkill for toys and calculators that don’t need flat voltage curves.
Whose Shelf It Belongs On
Watch collectors and anyone whose analog or digital timepiece deserves silver-oxide-grade power.
Skip It When
The Fuspower 376 377 SR626SW Batteries 40 Pack is the more cost-effective draw for a drawer that mostly feeds toys and timers.
Cotchear leans hard on cross-reference labeling, listing AG4 alongside LR626, L626, LR66, SR626, 377, and a few related codes. For someone replacing cells in a calculator, a small toy, or a vintage watch that accepts alkaline, that broad naming removes most of the guessing.
At 6.8mm in diameter (roughly 0.27 inches), the cell fits the standard AG4 slot. The ten-pack size suits a small toolkit drawer rather than a stocking-up situation.
Features That Help
- Wide cross-reference list covers LR626, L626, LR66, SR626, 377, and AG4.
- Compact 6.8mm format fits standard AG4 device slots.
- Alkaline chemistry keeps cost low for casual replacements.
Worth Noting
- Alkaline voltage curve drops more than silver-oxide; less ideal for precision watches.
- Only ten cells per pack; you’ll reorder often in gadget-heavy homes.
Best Suited To
Casual users replacing button cells in calculators, kids’ toys, and small household gadgets.
Not Your Match When
The LiCB 40 Pack SR626SW Silver Oxide 1.55V is the better call if the devices you care about most are analog watches or precision meters.
PKCELL leans into construction details that matter when a button cell sits inside an expensive watch for years. The stainless-steel housing and tight seal aim to keep the electrolyte where it belongs, namely inside the cell, instead of leaking onto a movement’s contact pads.
The 10-pack works as a small but reliable stockpile for a watch owner, a jeweler’s bench, or anyone who has ever pried open a watch back only to find green corrosion from a leaked cell.
Why It Works Well
- Stainless-steel housing resists corrosion during long shelf storage.
- Tight seal reduces leak risk on sensitive watch movements.
- Compatibility covers SR626SW, LR626, 377, 376, SR626, and AG4.
Practical Considerations
- Ten-pack is small for a household that cycles through button cells quickly.
- Alkaline chemistry, so voltage curve is less flat than silver-oxide options.
Feature Snapshot
Who Should Grab It
Watch owners who prioritize leak resistance over alkaline-versus-silver-oxide debates.
Consider Something Else When
The Fuspower SR626SW Watch Batteries AG4 10 Pack is a more affordable swap if you replace cells often and don’t mind alkaline chemistry.
Here is the part where a careful read of the back of your watch matters more than the product page. The SR920SW family (codes 371 and 370) is larger and higher-capacity than the AG4/SR626SW cell. The two are not interchangeable, even though they often sit in the same aisle.
Where this pack earns its place is in the SR920SW corner of your watch drawer, where you want a reliable alkaline cell with a tight seal. The cross-reference covers SR920SW, 371, 370, LR920, and AG6 in case any of those codes match your device.
What It Does Well
- Targets the SR920SW/371/370 size family for watches that need a slightly larger cell.
- Alkaline 1.5V output suits laser pointers, small calculators, and select timepieces.
- Tight seal construction matches other Fuspower button cells in the lineup.
Where It May Fall Short
- Not a true AG4 equivalent; using it in an AG4 device risks a loose fit or no power.
- Alkaline chemistry is less stable than silver-oxide for high-drain analog watches.
Who Will Love This
Anyone whose watch or device specifically calls for an SR920SW, 371, or 370 cell.
Reach For A Different Pick When
The Fuspower SR626SW Watch Batteries AG4 10 Pack is the correct sleeve for a true AG4 slot.
The LR44/AG13 family is a different beast from the AG4 cell. It’s larger, more common in small toys, calculators, and laser pointers, and a frequent sibling buy for anyone stocking button cells. The two are not interchangeable in a device, but they often share the same drawer.
This 10-pack slots into the toolkit next to the AG4 cells and covers the devices that don’t fit the smaller coin format. The alkaline chemistry and tight seal match the rest of the Fuspower button-cell line.
Notable Gains
- Targets the LR44/AG13 family that pairs naturally with an AG4 stockpile.
- Alkaline 1.5V output suits LED lights, small remotes, and laser pointers.
- Ten-pack keeps a small backup set without overspending.
Honest Caveats
- Larger than AG4; will not fit a true AG4 device slot.
- Alkaline voltage drops earlier than silver-oxide alternatives in precision tools.
Feature Snapshot
Perfect Match For
Anyone stocking a multi-format battery drawer that covers both AG4 and LR44 devices.
Where Another Pick Suits Better
The Fuspower SR626SW Watch Batteries AG4 10 Pack fits the bill if your devices are exclusively AG4.
A hundred button cells is the kind of buy that only makes sense if you actually go through them. Watch repair hobbyists, jewelry bench staff, school electronics teachers, and the household with four wearables and a stubborn cat toy all qualify.
The 100-pack shares the AG4 cross-reference label list with the smaller fuspower sleeves, so you still get the broad compatibility of SR626SW, 377, 376, LR626, and AG6 codes. Stable voltage and a quoted two-year shelf life keep spares functional through long storage.
Good Reasons To Consider
- 100-cell sleeve delivers the lowest per-cell cost among the AG4 entries.
- Broad cross-reference label list covers the AG4 family and adjacent codes.
- Two-year shelf life keeps unused spares functional over time.
Possible Compromises
- Bulk format is wasteful for a household that only burns through a few cells a year.
- Alkaline chemistry, not silver-oxide; not ideal for premium analog watches.
Who Will Love This
Repair hobbyists, teachers, and gadget-dense households that cycle through AG4 cells quickly.
Consider Something Else When
The Fuspower SR626SW Watch Batteries AG4 10 Pack is plenty if your annual AG4 consumption is in the single digits.
The LR1130 family is another button cell that lives close to AG4 in size but is not a direct swap. It powers calculators, small toys, and some laser pointers that need a slightly different fit.
The child-resistant packaging is the quiet highlight for households with curious kids. The cross-reference list covers LR1130, 389, 390, LR54, and AG10 so you can match codes by sight rather than by chart.
What Earns Its Place
- Child-resistant packaging reduces the risk of a curious kid getting into a fresh sleeve.
- Cross-reference covers LR1130, 389, 390, LR54, and AG10 codes.
- Ten-pack fits a small-tool drawer alongside AG4 sleeves.
Things To Weigh
- Not a true AG4 substitute; only fits LR1130-class devices.
- Alkaline chemistry drops voltage earlier than silver-oxide in precision devices.
Feature Snapshot
Right Fit For
Parents who want a button-cell sleeve that’s harder for small hands to crack open.
Skip It When
The Fuspower SR626SW Watch Batteries AG4 10 Pack is the proper fit for a true AG4 device.
What Matters Most Before Choosing Ag4 Battery Equivalents
The single biggest decision with AG4 equivalents is matching the code on your device to the cell you actually buy. AG4 is one name; SR626SW, 377, 376, LR626, and a handful of related codes all point to the same 6.8mm silver-oxide cell. The number printed on the device’s old battery or in its manual beats any product listing, so always start there before deciding on chemistry or pack size.
Chemistry is the second call. Silver-oxide cells (SR626SW) hold voltage on a flatter curve than alkaline alternatives (LR626 or AG4-labeled packs), which matters for analog watches and precision meters. For toys, calculators, and small household gadgets, alkaline cells deliver acceptable runtime at lower cost. If your device is a high-end quartz watch, lean silver-oxide. If it is a kids’ talking book, alkaline is fine.
Pack size and storage round out the practical choices. A 10-pack suits a small drawer and a once-in-a-while replacement rhythm. A 40- or 100-pack makes sense if your household burns through a cell every few weeks or runs a small repair bench. Keep spares in their original packaging, in a cool dry place, and rotate older stock to the front so you use the cells closest to their printed date first.
Things To Watch When Picking Your Pack
Common Shopping Slip Ups
The most common mistake is grabbing a cell that shares a number but lives in a different sizing family. AG4 and AG13 (LR44) look alike in a search bar but have different diameters and capacities, and dropping one into the other’s slot rarely ends well. Always cross-check the diameter and code printed on the device or its manual before clicking through. A second pitfall is assuming alkaline and silver-oxide perform identically. They do not, especially in low-drain analog watches, where voltage sag shows up as lost minutes per month.
When Paying More Pays Off
Higher-tier packs earn their premium in two places: silver-oxide chemistry for accuracy, and tighter sealing for leak protection. A leak inside a watch movement can cost more to repair than a decade’s worth of premium batteries, so the small per-cell upgrade pays off fast for watch owners. Bulk packs earn their premium the other way, by cutting the per-cell cost when you actually go through the volume.