CNC spare parts
CNC Machine Backup Batteries for Controls and Encoders
Source replacement backup batteries that keep CNC parameters, programs and absolute encoder positions safe when the machine is off. Send the battery part number or a photo of the label and connector for a quick quote.
- Control and encoder backup
- Panasonic and Sanyo types
- Tested before dispatch
- Pan-India shipping
Replacement Batteries for CNC Machines
We supply CNC machine batteries across India, including types from brands such as
- Panasonic
- Sanyo
These batteries are widely used as replacements in CNC machines.
Backup Batteries That Protect CNC Memory and Encoder Data
In a CNC machine, a small backup battery keeps parameters, part programs and absolute encoder positions stored while the main power is off. At EKA CNC, we supply CNC Machine Batteries that protect this stored data. They are made for industrial use and long standby periods.
What to Expect from Our CNC Batteries
- Reliable Memory Backup: A healthy battery keeps CNC parameters, programs and absolute encoder positions intact while the machine is switched off, avoiding lost data and re-referencing after a shutdown.
- Industrial Construction: These batteries are made for long standby use. They are designed to withstand the rigorous conditions of industrial environments, including temperature variations and vibration.
- Long-Lasting Durability: Our batteries are engineered for extended service life, providing dependable power over long periods. This reduces the need for frequent replacements and helps lower overall maintenance costs.
- Seamless Compatibility: We offer a range of CNC Machine Batteries compatible with various CNC systems and equipment. Whether you need a battery for a specific machine or a versatile solution for different applications, we have options to meet your requirements.
- Easy Installation: Designed for straightforward installation, our batteries are easy to integrate into your existing CNC setup. Most CNC controls need the battery changed with control power on so memory is retained, so check your machine manual first.
Why Timely Battery Replacement Matters
- Protected Data: Avoid losing parameters, programs or encoder positions while the machine is powered off.
- Fewer Restart Problems: Planned replacement prevents battery alarms and data-loss faults when the machine is switched back on.
- Lower Recovery Costs: Replacing a battery costs far less than reloading lost parameters or re-referencing absolute axes.
Machines That Use Backup Batteries
EKA CNC Machine Batteries are ideal for a variety of CNC applications, including:
- Milling Machines
- Lathes
- Drill Presses
- CNC Routers
- Automated Production Systems
Whether you’re maintaining a complex CNC setup or a single machine, the right backup battery keeps parameters and programs safe between shutdowns.
Your next step
Get price & availability
Share the model or part number and quantity. Attach a nameplate photo or BOM on the quote form if you have one.
In this range
CNC Machine Backup Batteries Available from EKA CNC
Open a product for its specifications, or add several to one RFQ and send them together.
ABR-2 3AGCT4A 6 v CNC battery Lithium-ion
Specification: Pictures: Specifications Model Number BR-2/3AGCT4A Brand:Original Voltage:6V Capacity:5000mAh Weight:55g Diamter:34.5mm Height:33.5mm Made in Japan Package 20pcs/lot
Solenoid valve 24v
Toshiba Battery
TOSHIBA ER3V/3.6V Non-Rechargeable PLC/CNC Ultra Lithium Battery with Plug
Buyer guide
Control Batteries vs Encoder Batteries
A CNC machine can have more than one backup battery, and they do different jobs:
- Control (CNC memory) battery: fitted in or near the CNC unit. It keeps parameters, part programs, offsets and settings in memory when power is off.
- Absolute encoder battery: fitted in the servo amplifier or a separate battery box. It lets absolute encoders keep track of axis position while the machine is off, so the machine does not need re-referencing at start-up.
When a control battery goes flat, the machine may lose data. When an encoder battery fails, the control normally raises an alarm and the axes may need their reference position set again. Know which battery you are replacing before ordering.
When and How to Replace a CNC Battery
Replace the battery as soon as a battery-low alarm or indicator appears. Many machine builders recommend changing backup batteries on a fixed schedule, often once a year, instead of waiting for an alarm. Follow your machine manual.
- Back up parameters and programs before starting.
- Keep control power on unless the manual says otherwise, so memory is held while the battery is out.
- Match the voltage, chemistry, connector and physical size of the old battery.
- Check polarity, fit the new battery and clear the alarm.
- Dispose of the used lithium battery safely; do not short or puncture it.
Faster quotations
What to Include in Your Enquiry
Send what you have. If a detail is unknown, say so and we will help identify it from a photo or the machine documentation.
- Battery part number or a photo of its label
- Voltage and chemistry printed on the pack
- Connector type or a photo of the plug
- Where it is fitted: CNC unit or servo amplifier
- Machine and CNC control make and model
- Quantity required
Buyer questions
Frequently Asked Questions
What does the battery in a CNC machine do?
It is a backup battery, not a power source for machining. It keeps CNC parameters, programs and offsets in memory, or keeps absolute encoder positions, while the main power is off. If it fails, the machine may lose data or need its axes referenced again.
How often should a CNC machine battery be replaced?
Replace it immediately when the battery alarm appears. Many machine builders also recommend replacing backup batteries on a fixed schedule, often yearly, because a flat battery during a long shutdown can cause data loss. Check your machine manual for the recommended interval.
Should I change the battery with the machine powered on?
For most CNC controls, yes. Changing the memory battery with control power on keeps the memory supplied while the battery is out. Always follow the procedure in your machine manual and back up parameters and programs before you start.
Can I use a battery from a different brand as a replacement?
Yes, if the voltage, chemistry, capacity class, connector and physical size match. A battery with the right voltage but the wrong connector or size will not fit. Send a photo of the old battery and connector and we will check the match.
My machine lost its axis positions after a long shutdown. Is it the battery?
Very likely. Absolute encoder positions are held by a battery in the amplifier or a separate battery box. If that battery is flat, the control will show an alarm and the axes need referencing again. Replace the battery first, then follow the manual to restore the reference position.
Do you supply batteries in bulk for several machines?
Yes. Send the part numbers and quantities through our quote form and we will confirm price and availability. Planned replacement across all machines in a shop is a sensible way to avoid unexpected data loss during long shutdowns or holidays.
Are lithium CNC batteries safe to ship and store?
Lithium backup batteries are safe when stored cool and dry with terminals protected from short circuits. Keep them in their original packaging until use. Do not recharge, puncture or heat primary lithium cells, and dispose of used batteries through a proper e-waste channel.
From requirement to quotation
Have a part number or a machine down?
Send the model, nameplate photo or a short description. We check availability, compatible alternatives and lead time, then reply with a quotation.