What a battery cross reference does and why you need one

A battery cross reference is a lookup tool that matches batteries across different brand names and part numbers. When you have a battery from one manufacturer — say, an Energizer or Duracell — a cross reference tells you which batteries from other makers will work the same way in your device. This matters because the same battery chemistry, voltage, and size often gets sold under multiple names, and knowing those names saves you money and time.

The most common reason to use a cross reference is that your device manual lists a battery by one brand or code, but you can only find a different brand at your local store. Instead of ordering online or making another trip, you can check whether the battery in front of you will actually work. Cross references also help when a battery is discontinued — you can find a current replacement that has the same electrical properties.

Battery cross references work because batteries are standardized by size and chemistry. An AA alkaline battery from Energizer has the same voltage (1.5V) and dimensions as an AA alkaline from Duracell or a store brand. The cross reference straightforward lists which part numbers and brand names refer to the same physical and electrical product.

Key Takeaways

  • Cross references match batteries across brands by size, chemistry, and voltage, so you can substitute one brand for another without damaging your device.
  • The most useful cross references are organized by the original part number you're looking for, with all equivalent batteries listed next to it.
  • Battery manufacturers publish cross reference charts on their websites, and retailers like Amazon and Best Buy often include cross reference information on product pages.
  • Rechargeable batteries and primary (single-use) batteries have different cross references, so you must know which type your device needs before you look one up.
  • Specialty batteries like hearing aid cells, camera batteries, and watch batteries have their own cross reference systems because they use different naming conventions than standard sizes.

Where to find battery cross reference charts

The most direct source is the battery manufacturer's website. Energizer, Duracell, Panasonic, and Rayovac all publish cross reference PDFs or interactive tools. Energizer's cross reference tool, for example, lets you enter a part number and shows you equivalent batteries from other brands. These charts are free and updated regularly as products are discontinued or renamed.

Retailer websites also carry cross reference information. Best Buy, Amazon, and Walmart product pages often list "equivalent to" or "also known as" information in the technical specifications. This is useful when you're already shopping and want to compare options on the spot. Battery specialty retailers like Battery Plus and Interstate Battery maintain cross reference databases on their sites as well.

If you have the original battery in your hand, the easiest method is to read the part number printed on the label and search that number directly in a search engine along with the word "cross reference." This usually pulls up the manufacturer's chart or a retailer page with the information you need. Many device manuals also include a cross reference table in the appendix, though these can become outdated as products change.

How to read a cross reference chart

A typical cross reference chart is organized in columns, with one brand's part numbers down the left side and equivalent part numbers from other brands across the row. For example, an Energizer chart might show that their model E91 (AA alkaline) corresponds to Duracell's MN1500, Panasonic's LR6, and Rayovac's 815. All four batteries are physically and electrically identical — they just have different names depending on who made them.

The key information to match is the size code (AA, AAA, C, D, 9V, etc.) and the chemistry type (alkaline, lithium, NiMH rechargeable, silver oxide, etc.). If these two pieces of information match, the batteries are interchangeable. Voltage should also be the same — a 1.5V AA alkaline will not work as a substitute for a 3V lithium battery, even though both are called "AA."

Some cross reference charts also note performance differences, such as whether one version is designed for high-drain devices or has a longer shelf life. These notes help you choose the best substitute if multiple options are available. Always read any footnotes or legends on the chart, as they often explain special cases or discontinued products.

Differences between primary and rechargeable battery cross references

A primary battery is single-use (alkaline, lithium, carbon-zinc), while a rechargeable battery is designed to be charged many times (NiMH, lithium-ion). The two types have separate cross reference systems because they use different part number conventions and are not interchangeable in most devices.

For example, Energizer's primary AA alkaline is the E91, but their rechargeable AA NiMH is the NH15. A cross reference chart for primary batteries will not list the NH15, and vice versa. If your device manual specifies "alkaline," you must use an alkaline cross reference and find an alkaline substitute. Using a rechargeable battery in a device designed for primary batteries can damage the device or cause the battery to overheat.

When you search for a cross reference, make sure the chart you're looking at covers the right battery type. Most manufacturer websites have separate sections for primary and rechargeable products. If you're unsure which type your device needs, check the device manual or the battery compartment label — it will usually say "alkaline" or "rechargeable."

Specialty batteries and their own cross reference systems

Some batteries use naming systems that do not follow the standard AA, AAA, C, D pattern. Hearing aid batteries (size 10, 13, 312, 675), camera batteries (CR2, CR2032), and watch batteries (SR626, SR927) all have their own cross reference conventions. These batteries are smaller and use different chemistry, so they cannot be substituted with standard sizes.

Hearing aid batteries are a common example. A size 13 hearing aid battery from Energizer (AZ13) corresponds to Duracell's DA13 and Rayovac's ZA13. The cross reference works the same way — match the size code and chemistry — but the naming system is different. If your device uses a hearing aid battery, make sure you're looking at a hearing aid cross reference, not a standard battery chart.

Camera and watch batteries are usually labeled with a code like "CR2032" (coin cell) or "SR626" (silver oxide). These codes are standardized across manufacturers, so a CR2032 from any brand is equivalent to any other CR2032. However, if you need a substitute for a CR2032, you cannot use an AA battery — you must find another coin cell with the same voltage and diameter. Manufacturer websites have separate cross reference sections for these specialty types.

Common mistakes when using a cross reference

The most frequent error is matching only the size code (AA, AAA, etc.) without checking the chemistry type. An AA alkaline battery and an AA lithium battery are not interchangeable, even though both are "AA." The cross reference will list them separately, so always read the full part number and chemistry description before assuming two batteries are equivalent.

Another mistake is using an old or incomplete cross reference chart. Battery part numbers change when products are discontinued or reformulated. If you're using a chart from a manufacturer's website, it should be current, but if you find a cross reference in an old manual or forum post, verify the information against a current source before buying. Retailers sometimes list outdated cross references on product pages, so check the manufacturer's official chart when in doubt.

A third error is confusing voltage with size. A 9V battery is not a substitute for a C battery just because both are "large." The voltage and chemistry must match exactly. If your device manual specifies a 1.5V AA alkaline, a 3V AA lithium will not work, even though both are AA-sized. Always check the voltage printed on the battery label and match it to what your device requires.

When a cross reference does not solve your problem

If you cannot find a cross reference match, the battery you need may be discontinued or very specialized. In this case, contact the device manufacturer directly — they often know about equivalent replacements or can tell you whether a different battery type will work. Some older devices use batteries that are no longer made, and the manufacturer may have published a compatibility guide for these cases.

If the device is very old or the battery is proprietary (made only for that device), you may need to replace the device itself or find a used battery online. Battery specialty retailers sometimes stock discontinued batteries, so calling a local Battery Plus or Interstate Battery location is worth trying. Online forums dedicated to the device type (vintage cameras, old radios, etc.) often have members who know where to find hard-to-find batteries.

For rechargeable devices with built-in batteries (phones, laptops, power tools), a cross reference does not explore — you need a replacement battery designed specifically for that model. Check the device manual or the manufacturer's website for the correct part number. Using the wrong battery in a device with a built-in battery can cause overheating, fire, or damage to the device's charging circuit.

Frequently Asked Questions

Can I use any AA battery in place of another AA battery?

Only if the chemistry and voltage match. An AA alkaline (1.5V) works in place of another AA alkaline, but not in place of an AA lithium (3V) or AA rechargeable NiMH (1.2V). Always check the voltage and chemistry type on both the battery label and your device manual before substituting.

What does "equivalent to" mean on a battery cross reference?

It means the two batteries have the same size, voltage, and chemistry, so they will work the same way in your device. The part numbers are different only because they come from different manufacturers. Equivalent batteries are interchangeable.

Do I need a cross reference for rechargeable batteries?

Yes, but you must use a rechargeable cross reference, not a primary battery one. Rechargeable batteries have their own part numbers and cannot be substituted with single-use batteries. Check your device manual to confirm whether it requires rechargeable or primary batteries before looking up a cross reference.

Where is the part number printed on a battery?

The part number is usually printed on the battery label, often near the top or bottom. It may be a code like "E91" (Energizer), "MN1500" (Duracell), or "LR6" (Panasonic). If you cannot find it, check your device manual — it will list the correct part number or battery type.

What if the cross reference shows multiple equivalent batteries?

All listed batteries are interchangeable, so you can use any of them. The choice usually comes down to price, availability, and brand preference. Some versions may have longer shelf life or better performance in high-drain devices, so read any notes on the chart to pick the best option for your needs.