Short answer: the AE‑1 uses a single 6V PX28‑size cell, commonly sold as PX28, 4LR44, 4SR44, or PX28L. These modern equivalents give you budget and performance choices that work with the original design.
This guide explains what that 6‑volt cell powers inside the body and why it matters for exposure accuracy and reliable shutter action when you shoot film or test photos at home. The cell runs the light meter and the electronic shutter, so fresh power keeps metering accurate.
You’ll find the compartment at the bottom of the body. Align the polarity, snap the cover closed, and the meter should respond. If you store the unit long term, remove the cell and keep it cool and dry to avoid leaks.
Next, we break down chemistry choices — silver‑oxide, alkaline, and lithium — and where to buy fresh cells in the U.S., from local photo shops to major online retailers. This section sets the stage so you buy the right 6V type and install it with confidence.
Canon AE-1 battery basics for film shooters in the United States
For film shooters, steady 6V power means accurate exposure and a camera that fires when you need it. The PX28/4LR44 form factor on A‑series bodies runs two key systems: the internal light meter and the electronically timed shutter. These systems decide whether the model is ready to use and how reliably it records a frame.
What the power supports:
- The internal meter activates when you half-press the shutter or advance the lever, giving instant camera light readings for framing and exposure.
- The electronic shutter needs steady voltage to time exposures correctly; low power can prevent the shutter from releasing.
- Most A‑series bodies include voltage regulation, so metering and timing stay stable as the cell discharges.
Quick health checks and buying
Battery checks vary by model: expect an LED flash or a quick beep for a healthy cell, and slower signals when power runs low. U.S. shooters can pick the correct cell at local stores or larger electronics counters. Keep a fresh spare in your kit so the meter and shutter stay reliable on location.
| Function | Symptom of low power | Action |
|---|---|---|
| Light meter | Dim or no reading | Replace cell; test meter before shooting |
| Electronic shutter | Shutter won’t fire | Swap cell; avoid forcing mechanisms |
| Camera readiness indicators | Slow flash or slow beeps | Install fresh cell; carry spare |
What Battery Does A Vintage Canon Ae1 Camera Take
Not all 6‑volt options behave the same; chemistry and design change runtime and output under load. The official spec calls for a single 6V PX28‑size cell. Today those appear as 4LR44 (alkaline), 4SR44/PX28‑S (silver‑oxide), or PX28L (lithium).
Silver‑oxide 4SR44 gives the steadiest output and smoother meter and shutter performance across most of its life. Alkaline 4LR44 is the cheapest choice and works well thanks to A‑series voltage regulation.
Lithium PX28L lasts longest and performs in cold conditions, but costs more. The camera’s internal regulation keeps metering accurate until the cell nears end‑of‑life, then the unit simply stops instead of misreading exposures.
- Official type: single 6V PX28‑size (modern labels: 4LR44, 4SR44, PX28L)
- Best balance: silver‑oxide (stable output)
- Budget: alkaline (good everyday value)
| Chemistry | Pros | Cons |
|---|---|---|
| Silver‑oxide (4SR44) | Stable voltage, consistent meter | Moderate cost |
| Alkaline (4LR44) | Inexpensive, widely available | Steeper end‑of‑life drop |
| Lithium (PX28L) | Longest life, cold tolerant | Higher price |
If you can’t find one, stacking four LR44 cells is a workable 6V substitute. Ensure tight contact, correct polarity, and avoid mixing ages or brands to prevent intermittent power during use.
Installing and checking your Canon AE-1 battery
Installing power correctly ensures the meter reads true and the shutter will fire when you need it.
Where to place the cell: Find the compartment on the bottom plate and open the cover. Match the plus and minus symbols inside before you seat the cell so contacts align perfectly the first time.
Step‑by‑step installation
Insert the new cell straight into the chamber and close the door firmly. If it won’t latch smoothly, remove and reseat to avoid bending the contact springs.
How to perform a check
After installation, perform a quick power check. Some models show a blinking LED, others emit rapid beeps to confirm power to the meter and shutter. Slow flashing or slow beeps mean low power and signal you should replace the cell before the camera stops in the field.
Troubleshooting common problems
If the light meter or shutter fails, recheck polarity and clean the contacts with a cotton swab and isopropyl alcohol. Ensure the door closes securely so the cell sits snugly; a loose fit causes brief drops in power during use.
- Confirm meter activation with a half‑press of the shutter or lever wind.
- Wipe the screen and viewfinder with a microfiber while you install the cell to keep the lens and focus area clear.
- If a fresh cell still leaves the unit dead or the shutter locked, the issue may be electronic or mechanical and needs service by a qualified technician.
Buying tips, battery life, and care for your Canon AE-1
Good sources for fresh PX28‑size cells include independent camera stores, large electronics chains, and reputable web outlets. Local photo shops often stock recent production, and staff can confirm chemistry and expiration dates.
Recommended options: choose 4SR44 (silver oxide) for steady output, 4LR44 (alkaline) when price matters, or PX28L (lithium) for longer life and cold tolerance.
- In the U.S., check specialty stores, big‑box electronics counters, and verified online sellers for clear expiration dates.
- Prioritize known brands and recent packaging dates to extend real‑world battery life.
- Keep a fresh spare in your kit; casual use can give several months of service, heavy metering cuts that time.
| Type | Pros | Typical life |
|---|---|---|
| 4SR44 (silver oxide) | Stable output | Several months |
| 4LR44 (alkaline) | Low cost | Months, variable |
| PX28L (lithium) | Longest life | Many months |
Store spares in a cool, dry place and remove the cell if the camera sits unused for months. If corrosion appears, replace the cell and clean contacts right away.
For more details and shopping links, see our guide on PX28 options: PX28 buying and care.
Conclusion
Bottom line: use one PX28-format 6‑volt cell and you’ll avoid most power-related problems on A-series gear.
Choose silver‑oxide for steady output, alkaline to save, or lithium for the longest run between swaps. Internal voltage regulation keeps metering and shutter timing accurate until the unit simply stops when volts drop too low.
Practical wrap-up: keep fresh batteries on hand, note install months, and run a quick power check before shoots. Clean contacts, reseat the cell if a problem occurs, and pack one spare so your film camera stays ready for photos over the coming months.
Use brand filters and read buyer comments when shopping, and keep dust off the focusing screen and front lens to avoid last‑minute surprises.
FAQ
Which cell fits the Canon AE-1?
The original specification calls for a 6V PX28 (also sold as 4SR44 or 4LR44 in some markets). Modern equivalents include silver oxide 4SR44, alkaline 4LR44, and lithium PX28L. Silver oxide models match voltage and give the most stable meter performance.
What functions rely on the power source in this film SLR?
The meter, shutter electronics for certain speeds, and the camera readiness indicator all need the 6V source. Mechanical shutter release still works on many models, but the meter and auto features require proper voltage.
How do silver oxide, alkaline, and lithium compare?
Silver oxide (4SR44) offers stable voltage and predictable life. Alkaline (4LR44) is cheaper but drops voltage faster, which can affect the light meter. Lithium (PX28L) lasts longest and resists leakage, but it can deliver slightly different voltage behavior with older meters.
Can I stack four LR44 cells to substitute a 4LR44?
Yes, stacking four LR44 cells in a holder can recreate a 4LR44, but connections and bulky fits can be awkward. It’s cost-effective short term but increases contact and leakage risks compared with a single packaged 4LR44 or 4SR44.
Where is the battery compartment and how do I install one?
The compartment sits on the camera base. Open the latch, remove the old cell, orient the replacement with the positive marking toward the spring or as shown in the compartment, then close the cover securely.
How can I check if the power cell is working correctly?
Turn the camera on and observe the meter needle; it should respond to light. On some bodies a ready lamp or beep confirms power. If the meter reads erratic or the needle won’t move, the cell may be weak or corroded contacts may need cleaning.
What troubleshooting steps help with meter or shutter problems?
Replace the cell with a known good 6V equivalent first. Clean battery contacts with isopropyl alcohol and a cotton swab. If problems persist, the meter coupling or electronics may need service from a camera repair shop.
Where can I buy suitable cells in the United States?
You can find 4SR44, 4LR44, and PX28L at camera stores, big-box electronics retailers, and online marketplaces like B&H Photo, Adorama, Amazon, and specialty battery shops.
Which brands and models are recommended?
For long-term use, choose silver oxide 4SR44 for stable meter performance or lithium PX28L for extended life and leak resistance. Reliable brands include Duracell, Energizer, Panasonic, and specialty makers like Rayovac and Ultralast—verify the exact model code before buying.
How long will a replacement last and how should I store spares?
Expected life varies with use; lithium cells can last years in standby, silver oxide several months to a year under regular shooting. Store spares in a cool, dry place and check date codes. Replace batteries before long trips to avoid unexpected failures.
When should I remove the cell to protect the camera and film?
Remove the cell if the camera will be unused for many months to reduce leak risk. If you plan to shoot soon, leave a fresh, high-quality cell installed. Inspect the compartment periodically for corrosion if a cell stays in place.
