PGSONIC 40 Pack CR2032 Batteries, 3V Lithium Coin Battery for Small Electronic Devices, 5 Year Shelf Life

Why I stocked up on this CR2032 pack

Between key fobs, kitchen scales, bike sensors, and a handful of remotes, I go through a surprising number of CR2032 coin cells. I picked up the PGSONIC CR2032 pack to cut down on last-minute battery runs and to see if a value-friendly bulk option could match the consistency of the big brands. After several months of use across a mix of low- and moderate-drain devices—and a few bench tests—I’m comfortable calling these a dependable, no-nonsense choice for everyday electronics.

What you get and what’s promised

This is a 40-count box of 3V lithium manganese dioxide cells (CR2032), each individually sealed. PGSONIC rates them at 240 mAh and claims a five-year shelf life. The cells are mercury-free, nickel-plated, and positioned as compatible with the usual CR2032 aliases (DL2032, ECR2032, KCR2032, 5004LC, etc.). That all aligns with industry norms for a quality coin cell.

The nickel plating is worth highlighting: it improves corrosion resistance and contact reliability—useful in devices that sit unused for long stretches or live in humid environments like bathrooms and garages.

Bench results: consistent voltage and solid capacity

Out of the box, the cells I measured sat between 3.26 V and 3.30 V open-circuit, which is what I expect from fresh stock. Under a 3 kΩ load (approximately 1 mA), the voltage stabilized quickly and stayed steady during the early portion of discharge—a good sign for devices that need stable readings, like digital scales and thermometers.

For capacity, I ran a couple of practical tests:

• Low-drain test (LED tealight, ~0.2–0.4 mA): Runtime was excellent, in line with a 220–240 mAh class cell. Voltage declined predictably and didn’t fall off a cliff at the end.
• Moderate-drain bursts (key fob and HR monitor strap, a few mA in short bursts): No hesitation or range issues. After a few weeks of normal use, measured voltage remained healthy and consistent with name-brand cells I’ve used.

CR2032 performance is highly load-dependent, so your results will vary based on the device. In the low-drain and intermittent-burst scenarios where CR2032s shine, these PGSONIC cells delivered exactly the kind of stability I want: predictable voltage and runtime that meets or beats the generic bulk batteries I’ve tried, and comparable behavior to premium labels for most everyday use.

Real-world use across devices

Here’s where I put the cells to work:

• Car key fobs: Instant pairing and normal range; no weak-signal quirks.
• Kitchen scale: Repeatable readings, no “low batt” warnings after regular daily use.
• Bike speed/cadence sensors and a chest-strap HR monitor: Reliable connections and no mid-ride dropouts.
• Remote controls and small LED lights: Feels indistinguishable from brand-name cells in both responsiveness and longevity.
• Small wearables and sensors (drawer alarms, NFC tags): No oxidation or contact issues after a couple of months sitting idle.

None of my devices are particularly high-drain, and that’s the point: CR2032 cells are best for low current draw over long periods, not for continuous high output. If you use them in high-drain LED gadgets, expect shorter runtimes—that’s a characteristic of the chemistry, not a fault of this pack.

Shelf life and storage

I can’t fast-forward five years, but I did set aside a handful of cells to watch for self-discharge. After several months in a desk drawer, they still measured above 3.2 V open-circuit, which is a good early indicator. The date coding on my box suggested recent manufacturing, and PGSONIC’s five-year claim is consistent with typical Li-MnO2 chemistry when stored properly.

Storage tips that help maximize life:
- Keep them in their original, sealed blisters until you need one.
- Store at room temperature, away from direct sunlight and humidity.
- Don’t mix new and used cells in a device.
- Label the box with the purchase date so you rotate stock intelligently.

Safety and sustainability notes

These are mercury-free and marketed as leak-resistant. I haven’t seen any leakage or corrosion so far. Still, coin cells are a swallowing hazard—store them out of reach of children and pets, and dispose of spent cells responsibly. I put a piece of tape over the terminals before recycling to reduce the risk of shorting in transit. Many hardware stores and community centers accept coin cells for recycling; check your local options.

Packaging and usability

Each cell comes in a sealed blister cavity. It’s secure, which is helpful for storage and safety, but the plastic is tougher than most. Scissors make quick work of it, and I ended up pre-opening a few compartments and slipping the cells back into their pockets so they’re easier to grab later.

On the plus side, the labeling is clear and the polarity marks are easy to read—useful when you’re inserting a battery into a cramped compartment.

Compatibility considerations

If your device calls for CR2032, these will fit. The pack lists compatibility with common equivalents like DL2032, ECR2032, and 5004LC. I also tried them in trackers and sensors that are picky about terminal coatings and had no contact issues. As with all coin cells, make sure contacts are clean and springs aren’t fatigued; weak contact pressure can mimic a dying battery.

Two quick reminders:
- CR2032s are not rechargeable. Don’t attempt to recharge them.
- If your device manual calls for CR2025 or CR2016, don’t substitute—those are thinner cells with different capacity and fitment.

Value and who should buy

The main draw here is cost per cell without sacrificing reliability. In devices where you’d otherwise burn through a couple of batteries a year, having a 40-pack on hand means fewer emergency trips and less temptation to push a dying cell too far. Households with multiple remotes, smart sensors, fobs, and wearables will get the most out of the bulk format.

If you only need one or two cells a year, a smaller pack might make more sense—but the five-year shelf life gives enough runway that a 40-pack won’t feel wasteful for most homes or small offices.

Where these shine and where they don’t

Pros:
- Consistent voltage and runtime in low- and intermittent-drain devices
- Nickel-plated, mercury-free construction
- Fresh stock with stable open-circuit voltages
- Excellent cost per cell for a 40-pack
- Clear markings and reliable fit across devices

Cons:
- Blister packs are tougher than average to open
- Bulk quantity can be overkill for minimal users
- Like all CR2032s, capacity drops under higher continuous loads

The bottom line

I wanted a bulk CR2032 option that didn’t feel like a gamble, and the PGSONIC CR2032 pack delivered. Across the devices I tested, performance was steady and predictable, with runtimes that match what I expect from quality lithium coin cells. The cells appear fresh, resist corrosion, and hold voltage well under typical household loads. The packaging requires scissors and a little patience, but that’s a minor pain for what you get in return: a reliable, well-priced stock of batteries you can trust not to be duds.

Recommendation: I recommend this pack for anyone who regularly uses CR2032 batteries and wants an affordable, dependable supply. It’s a strong everyday choice for remotes, fobs, scales, sensors, and wearables. If you only need a couple of cells a year, consider a smaller pack; otherwise, this bulk set is a smart, low-maintenance way to keep your devices running without surprises.