# Siemens 6ES7971-1AA00-0AA0 Backup Battery for S7-300 CPUs and S5-90U

**URL:** https://aio.lv/en/product--siemens-6es79711aa000aa0--3438830
**Data updated:** 2026-05-18 02:46 (EEST)
**Category:** Batteries
**Manufacturer:** Siemens
**Manufacturer code:** 6ES79711AA000AA0
**EAN:** 4025515062820
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 44.99 €
**Prices and availability valid until:** 2026-07-21 23:59
**Price without VAT (21%):** 37.18 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--siemens-6es79711aa000aa0--3438830

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 14.07.2026 | free |
| Pickup points | 17.07.2026 | 1.89 EUR |
| Courier delivery to door | 17.07.2026 | 4.99 EUR |

## Summary description

The Siemens 6ES7971-1AA00-0AA0 is a reliable backup battery designed for industrial automation systems. It is specifically compatible with SIMATIC S7-300 CPUs and S5-90U controllers. This lithium battery ensures data retention and memory backup during power outages, providing essential support for programmable logic controller operations. Its compact design and stable performance make it an ideal replacement component for maintaining system integrity in industrial environments.

## Long description

The Siemens backup battery is a high-quality power component engineered to provide reliable memory backup for industrial automation systems. Designed specifically for compatibility with SIMATIC S7-300 CPUs and S5-90U controllers, this lithium battery ensures that critical data and program settings remain intact during power failures or system shutdowns. Its robust construction and stable voltage output make it an essential maintenance component for ensuring the continuous operation and integrity of programmable logic controllers in demanding industrial environments.
Advantages
This backup battery offers exceptional reliability and long-term stability, which are critical for maintaining the operational continuity of automation hardware. By providing a consistent power supply to the volatile memory of the controller, it prevents the loss of configuration data and user programs during unexpected power interruptions. Its compact form factor allows for easy installation within existing control cabinets, while its high energy density ensures a long service life, reducing the frequency of maintenance cycles and minimizing system downtime.
Suitable for
SIMATIC S7-300 CPU memory backup
S5-90U controller data retention
Industrial automation systems requiring power failure protection
Maintaining PLC configuration settings
When it may not be suitable
This battery is not intended for use in devices outside of the specified SIMATIC S7-300 and S5-90U product families. It should not be used as a primary power source for operating the controller hardware itself, as it is strictly designed for memory backup purposes.
Key specifications
Battery chemistry: Lithium
Voltage: 3.6V
Capacity: Minimum 0.85Ah
Compatibility: SIMATIC S7-300 CPUs and S5-90U
How to use
To install the battery, ensure the programmable logic controller is powered down or in a safe state according to the manufacturer's guidelines. Locate the battery compartment on the CPU module, remove the depleted unit, and insert the new battery, ensuring correct polarity alignment. Once installed, verify that the system recognizes the battery status through the diagnostic software or the status indicators on the CPU front panel.
What to consider before purchase
Verify the specific CPU model compatibility
Check the current battery status in your PLC diagnostics
Ensure proper storage conditions before installation
Follow local regulations for lithium battery disposal
Usage recommendations
Always replace the battery before it reaches its end-of-life threshold to prevent potential data loss. It is recommended to keep a spare unit in stock for critical automation systems to ensure immediate replacement when necessary.

## Specifications

### Battery

| Feature | Value |
|---|---|
| Product colour | Black |

### Other features

| Feature | Value |
|---|---|
| Compatible products | S7-300 CPUs and S5-90U |

### Weight & dimensions

| Feature | Value |
|---|---|
| Weight | 0.011 kg |

## FAQ

### How much does the Siemens 6ES7971-1AA00-0AA0 Backup Battery cost, and is it available for purchase?

The price is 44.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 15 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 14.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All Siemens products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized Siemens service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

### How can I tell if this product suits my needs?

When making a choice, we recommend paying attention to the key features: weight, compatibility with your devices or usage conditions, material quality, functionality, and warranty terms. These characteristics will help you determine how well the model meets your needs.

## Image

https://aio.lv/img/cache/product/3438830/61303868_large.webp