Backup batteries for PLCs, HMIs, CNC systems and robots

Backup batteries – sales and help with selection

We sell new original and compatible backup batteries for PLCs, HMIs, CNC systems and robots. Depending on the equipment, they help retain memory, parameters or time when power is off. We check the right battery using the original part and equipment identification.

FOXON supplies new backup batteries worldwide
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We will send a non-binding quote within 1 hour.

  • Worldwide delivery
  • Batteries for different devices in one place
  • Help choosing a battery
  • New batteries with warranty
More about choosing: Backup batteries

Protect your program and data during a power failure

Backup batteries help preserve the program, parameters and data of a control system when the power is switched off or interrupted. We offer original and compatible batteries for industrial equipment from leading manufacturers.

Backup battery for PLC, HMI and industrial control systems
Batteries for PLCs, HMIs, CNC systems and robots Original and compatible versions Best-selling types in stock Help verifying compatibility

How do you find the correct replacement battery?

Select the battery according to the exact part number of the original battery or the specific type of industrial device.

Option 1 Search for the original battery code

The quickest method is to enter the order number or designation printed directly on the original battery into the search field.

Option 2 Select the device manufacturer

Use the subcategories below to select the manufacturer of the PLC, HMI, CNC system, robot or other control equipment.

Option 3 Check voltage, connector and polarity

Batteries that look identical may differ in voltage, connector, wire configuration or capacity.

Unable to find the correct battery?

Send us the device or original battery designation and a photo. We will help verify a suitable replacement.

Help me choose a battery

The battery protects the program and important control-system data

Backup batteries are used in PLCs, HMI panels, CNC systems, industrial computers, programming devices and robots. When the main power supply is switched off, they can back up memory, system parameters, the clock or the user program.

The exact device type matters

Check the manufacturer, device model, CPU or panel order number and the designation of the original battery.

Matching dimensions are not enough

The battery must have the correct voltage, chemistry, capacity, connector, polarity and wire configuration.

Original or compatible battery

A high-quality compatible version can replace the original battery, but it must match its electrical parameters and physical design.

Check the device manufacturer's replacement procedure first

Incorrect replacement or leaving the battery disconnected for too long may cause loss of the program or parameters. Before starting, create a backup and follow the manual for the specific PLC, HMI, CNC system or robot.

Frequently asked questions about backup batteries

How do I know when the battery needs replacing?

The control system may display a message, alarm or diagnostic LED indicating low battery voltage. The exact warning method depends on the manufacturer and device type.

Can I use a battery with the same voltage and connector?

Not always. Also verify the chemistry, capacity, polarity, wire configuration and compatibility with the exact device type.

What should we send you to verify a suitable replacement?

A photo of the original battery and connector, a clearly readable battery designation, the manufacturer and the exact PLC, HMI panel, CNC system or robot model.

Since 2006, FOXON has been a trusted partner in industrial automation. We supply spare parts, industrial products and solutions for data collection, industrial network diagnostics and the digitalization of manufacturing plants. We also provide professional training, technical support and complete project implementation – from initial design through commissioning.
Case Study: When It Comes to Parts, We Have You Covered

Case Study: When It Comes to Parts, We Have You Covered

A customer's production line stopped at the end of the afternoon shift. The customer's maintenance needed a working SIEMENS safety relay to put the production line back into operation. What about FOXON? Were we able to respond as quickly as the customer needed?

Read this recent real-life story about a FOXON sales representative and a manufacturer of fuel and brake systems based southeast of Prague to find out how cooperation with FOXON works.