Electronic Shelf Label Battery Replacement Guide: How to Choose the Right CR2450 Pack

Electronic Shelf Label Battery Replacement Guide: How to Choose the Right CR2450 Pack

Electronic shelf labels are designed to operate quietly in the background. Once thousands of labels are installed across a supermarket, warehouse or retail chain, however, battery replacement becomes a serious maintenance issue. A battery that looks almost identical to the original may still have the wrong voltage, tab direction, holder structure or contact position.

For this reason, selecting an ESL replacement battery is not simply a matter of ordering two CR2450 coin cells. The electrical configuration and mechanical assembly must match the electronic shelf label in which the battery will be installed.

This guide explains the most important points to check when sourcing CR2450 and CR2450-2P replacement battery packs for electronic shelf labels, digital price tags and related low-power retail devices.

1. Start with the Correct Battery Chemistry and Voltage

CR2450 is a primary lithium manganese dioxide coin cell, commonly written as Li-MnO2. Its nominal voltage is 3.0V, and it is non-rechargeable.

This distinction is important because product descriptions sometimes use the general term “lithium-ion” for all lithium batteries. Technically, a CR2450 cell is not a rechargeable 3.6V or 3.7V Li-ion cell. It must also not be confused with rechargeable coin-cell models such as LIR2450.

Installing a rechargeable 3.6V or 3.7V battery in equipment designed for a 3.0V CR2450 can expose the electronic shelf label to an unsuitable voltage. Conversely, attempting to recharge a standard CR2450 creates a safety risk because CR-series Li-MnO2 cells are designed for one-time discharge.

Before ordering a replacement pack, confirm all three points:

• The original battery is marked CR2450.

• The nominal pack voltage is 3V.

• The device is designed for a non-rechargeable Li-MnO2 battery.

If the original label is missing or unreadable, identify the electronic shelf label brand and exact model before selecting the chemistry.

2. What Does CR2450-2P Mean?

In a CR2450-2P pack, two CR2450 cells are connected in parallel. The parallel connection keeps the nominal output at 3V while increasing the available capacity compared with a single cell.

This is different from a series connection. Two 3V cells connected in series would produce a nominal 6V output, which is not interchangeable with a 3V 2P pack.

Capacity should also be treated carefully. The usable capacity of a CR2450-2P assembly depends on the actual cell model, discharge current, cutoff voltage, operating temperature and storage conditions. For that reason, buyers should verify the cell datasheet and the finished-pack specification instead of assuming that every CR2450-2P battery has exactly the same capacity.

For projects requiring a configurable structure, Cowon offers a custom CR2450-2P 3V battery pack for electronic shelf labels with options for tabs, terminals and mechanical integration.

3. Capacity Alone Does Not Determine ESL Battery Life

A higher capacity can help extend operating time, but the printed mAh value is only one part of the calculation. Actual service life in an electronic shelf label is also influenced by:

• How often the display content is updated.

• The frequency and duration of wireless communication.

• Peak current during data transmission or display refresh.

• Sleep-mode current of the ESL electronics.

• Minimum operating voltage of the device.

• Ambient temperature and storage conditions.

• Contact resistance at the tabs and terminals.

Electronic shelf labels spend much of their time in a low-power state, but wireless communication and screen refresh events can create short current pulses. A suitable cell therefore needs not only sufficient nominal capacity but also stable voltage under the device’s real pulse-load profile.

When comparing suppliers, request the underlying cell specification and confirm how the quoted capacity is measured. Two packs bearing the same CR2450-2P name may perform differently if they use different cells or assembly processes.

4. Mechanical Compatibility Is Just as Important as Electrical Compatibility

Even when the chemistry, voltage and capacity are correct, the pack may not fit the device. Electronic shelf labels use several battery-retention and contact designs, including loose cells, welded tabs, metal clips and plastic holders.

The following details should be compared with the original battery:

Cell Arrangement

Check whether the two cells are placed side by side, stacked, offset or installed in a dedicated plastic frame. The overall length, width and thickness must fit the battery compartment.

Holder Design

Some ESL batteries use a molded plastic holder to position the cells and contacts. Others use welded tabs without a holder. A similar-looking holder may still have different locking points or contact spacing.

Tab and Terminal Direction

The length, width, bend angle and direction of the nickel tabs must match the device. A reversed or incorrectly bent tab can prevent installation or create unreliable contact pressure.

Polarity

Confirm the positive and negative contact positions. Never assume polarity based only on the appearance of the holder. Reversed polarity can damage the label or prevent it from powering on.

Contact Position and Pitch

The distance between contacts must align with the ESL terminals. This is particularly important for packs using stamped contacts or custom welded assemblies.

For replacement projects, the safest approach is to compare the proposed pack with an approved original sample or a complete dimensional drawing.

5. Choosing a Replacement Battery for Hanshow Electronic Shelf Labels

Hanshow electronic shelf labels include multiple product families and mechanical battery arrangements. A battery described simply as “for Hanshow” should not automatically be treated as compatible with every Hanshow label.

Cowon supplies a CR2450-2P 3V Li-MnO2 replacement battery for Hanshow electronic shelf labels. Available configurations cover applications associated with models and families such as Nowa-266, Nowa-266R-NM, Nowa-266R-N, Stellar-M E31, M2.13, L2.9 and related Stellar-M E31H/E31HA variants.

Compatibility should still be confirmed against the exact ESL model and original battery structure before placing a volume order. Model names, regional versions and production revisions can sometimes use different holders or terminal arrangements.

For a new replacement project, provide clear photographs of:

1. The front and back of the electronic shelf label.

2. The complete original battery assembly.

3. The battery markings and polarity symbols.

4. The holder, tabs and contact positions.

5. The device model label or nameplate.

These details allow the supplier to evaluate compatibility instead of relying on the CR2450 model number alone.

6. What Information Should You Provide for a Custom ESL Battery Pack?

Providing complete information at the beginning reduces sampling time and prevents avoidable revisions. A useful ESL battery inquiry should include:

Required information	Why it matters
ESL brand and exact model	Helps identify the target device and known configurations
Original battery model	Establishes the basic chemistry and electrical requirement
Nominal voltage	Prevents an incorrect series or rechargeable-cell substitution
Capacity requirement	Supports operating-life and space evaluation
Cell quantity and arrangement	Defines the 1P, 2P or other pack structure
Overall dimensions	Confirms that the assembly fits the battery compartment
Holder and tab photographs	Shows the required mechanical interface
Polarity and contact spacing	Prevents reverse connection and installation problems
Operating temperature	Helps select an appropriate cell specification
Estimated annual quantity	Supports tooling, packaging and production planning
Packaging requirement	Defines bulk trays, individual packing, labels and shipping format

If a physical original sample is available, it should be retained as the golden sample for structural comparison and pre-production approval.

7. When Is a Custom Pack Better Than a Standard Coin Cell?

A standard loose CR2450 cell may be sufficient when the electronic shelf label contains its own battery holder. A custom assembled pack is more appropriate when the device requires:

• Two cells connected in parallel.

• A specific plastic frame or retention structure.

• Factory-welded nickel tabs.

• A defined terminal angle or contact pitch.

• Custom polarity orientation.

• Product identification labels or barcodes.

• Bulk packaging for service teams or assembly lines.

Factory-welded assemblies also avoid the need to solder directly to the coin cell. Direct soldering can expose the cell to excessive heat and should not be used as a substitute for a properly designed tab-welding process.

8. Sampling and Validation Before Mass Replacement

For fleet maintenance or an ESL production project, start with samples rather than approving a pack from photographs alone. A practical validation process should include:

1. Visual comparison with the original battery.

2. Measurement of pack voltage and polarity.

3. Installation and removal testing.

4. Contact-pressure and fit inspection.

5. Device startup and communication testing.

6. Display-refresh testing under normal working conditions.

7. Evaluation at the expected operating temperature.

8. Approval of the final label and packaging.

Once the sample is approved, the confirmed drawing, bill of materials and original sample should be used as production references. This is especially important when the battery is intended for maintenance across a large installed base of electronic shelf labels.

9. Safe Handling and Replacement Practices

CR2450 and CR2450-2P packs are primary lithium batteries. Basic handling rules include:

• Do not recharge the battery.

• Do not mix old and new cells in one assembly.

• Do not mix cells from different models or manufacturers unless the design has been validated.

• Do not short-circuit the terminals during storage or transport.

• Do not puncture, crush, heat or disassemble the cells.

• Verify polarity before installation.

• Keep removed batteries away from children.

• Follow applicable local requirements for lithium battery collection and disposal.

Battery packs should be stored in a dry, controlled environment with terminals protected against accidental contact. Refer to the selected cell manufacturer’s datasheet for the specific storage and operating-temperature limits.

Frequently Asked Questions

Is a CR2450 Battery Rechargeable?

No. A standard CR2450 is a 3V primary Li-MnO2 coin cell and is not rechargeable. Rechargeable coin cells use different model designations and electrical characteristics.

Can an LIR2450 Replace a CR2450?

It should not be treated as a direct replacement. LIR2450 is rechargeable and normally has a higher nominal and charging voltage. Only use it if the electronic shelf label was specifically designed for that battery.

Does CR2450-2P Mean 6V?

No. “2P” means two cells connected in parallel. The nominal pack voltage remains 3V while the available capacity increases. Two cells connected in series would produce a different voltage.

Are All CR2450-2P ESL Battery Packs Interchangeable?

No. They can differ in cell capacity, holder design, overall dimensions, tab direction, contact position and polarity. Compatibility must be checked against the exact device.

What Is the Best Way to Confirm Compatibility?

Provide the ESL brand and exact model, photographs of the original battery, dimensions, polarity and contact details. For mass production, test and approve samples before ordering the full quantity.

Build a More Reliable ESL Battery Replacement Program

The correct electronic shelf label battery must satisfy both electrical and mechanical requirements. Chemistry, voltage and capacity establish the electrical foundation, while the holder, welded tabs, contact spacing and polarity determine whether the pack can be installed reliably.

Cowon develops customized battery solutions for electronic devices and replacement applications. For ESL projects, we can support CR2450-2P pack configuration, welded-tab design, holder selection, labeling, packaging and sample validation based on the customer’s device or original battery.

If you are sourcing batteries for a retail rollout, maintenance program or electronic shelf label production project, send us the ESL model, original battery photographs, dimensions and required quantity. Our team can evaluate the structure and recommend a suitable 3V Li-MnO2 replacement battery configuration.