---
product_id: 87973967
title: "6ES7971-1AA00-0AA0 | SIEMENS SIMATIC S7, BACKUP BATTERY (LI) 3.6 V/MIN. 0.85 AH, FOR FOR S7-300 CPUS AND S5-90U"
brand: "siemens"
price: "€ 88.77"
currency: EUR
in_stock: true
category: "Siemens"
url: https://www.desertcart.pt/products/87973967-6es7971-1aa00-0aa0-siemens-simatic-s7-backup-battery-li-3
store_origin: PT
region: Portugal
---

# 0.85 Ah Capacity 3.6V Lithium Power Plug & Play Connector 6ES7971-1AA00-0AA0 | SIEMENS SIMATIC S7, BACKUP BATTERY (LI) 3.6 V/MIN. 0.85 AH, FOR FOR S7-300 CPUS AND S5-90U

**Brand:** siemens
**Price:** € 88.77
**Availability:** ✅ In Stock

## Summary

> 🔋 Power your control, never miss a beat!

## Quick Answers

- **What is this?** 6ES7971-1AA00-0AA0 | SIEMENS SIMATIC S7, BACKUP BATTERY (LI) 3.6 V/MIN. 0.85 AH, FOR FOR S7-300 CPUS AND S5-90U by siemens
- **How much does it cost?** € 88.77 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/87973967-6es7971-1aa00-0aa0-siemens-simatic-s7-backup-battery-li-3)

## Best For

- siemens enthusiasts

## Why This Product

- Trusted siemens brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Data Guardian:** Preserves program memory, system data, and real-time clocks seamlessly
- • **Compact Powerhouse:** AA size lithium battery with a robust 0.85 Ah capacity
- • **Uninterrupted Control:** Keeps your S7-300 & S5-90U PLCs alive during power cuts
- • **Effortless Installation:** Pre-wired push-in connector for quick, hassle-free setup
- • **Trusted Siemens Quality:** Engineered for reliability in critical industrial environments

## Overview

The Siemens SIMATIC S7 Backup Battery (6ES7971-1AA00-0AA0) is a 3.6V, 0.85 Ah lithium AA battery designed specifically for S7-300 CPUs and S5-90U controllers. It ensures continuous memory retention and system data preservation during power outages, featuring a pre-wired push-in connector for easy installation. Lightweight and compact, it’s a reliable power backup solution trusted in industrial automation.

## Description

SIMATIC S7 ? AA backup 3.6V lithium battery, 0.85 Ah has been designed for use with SIMATICS S7-300 CPUs and S5-90U. This backup battery helps ensure your PLC's data is safe if the power goes out, keeping your PLCs memory working through power cuts and shutdowns. Preserving programme functions, system data and real-time clocks, this 3.6V lithium battery ensures your controller has the power to do just that. A pre-wired push-in connector helps simplify installation. ? AA Battery size.

## Features

- ? AA Size
- 3.6 V Lithium
- 0.85 Amp hours
- For use with SIMATICS S7-300 CPUs & S5-90U

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07HCM1G83 |
| Batteries Required? | No |
| Batteries included? | No |
| Battery Capacity | 3.6 Volts |
| Battery Cell Type | Lithium Ion |
| Best Sellers Rank | 320,138 in Automotive ( See Top 100 in Automotive ) 592 in Motorbike Batteries |
| Date First Available | 14 Sept. 2018 |
| Item Package Quantity | 1 |
| Item Weight | 10 g |
| Item model number | 6ES7971-1AA00-0AA0 |
| Manufacturer | Siemens |
| Package Dimensions | 3.12 x 1.45 x 1.45 cm; 10 g |
| Part number | 6ES7971-1AA00-0AA0 |
| Voltage | 3.6 Volts |

## Product Details

- **Battery capacity:** 3.6 Volts
- **Battery cell composition:** Lithium Ion
- **Brand:** SIEMENS
- **Recommended uses for product:** Power Tool
- **Voltage:** 3.6 Volts

## Images

![6ES7971-1AA00-0AA0 | SIEMENS SIMATIC S7, BACKUP BATTERY (LI) 3.6 V/MIN. 0.85 AH, FOR FOR S7-300 CPUS AND S5-90U - Image 1](https://m.media-amazon.com/images/I/51ZTI7IDCEL.jpg)

## Frequently Bought Together

- 6ES7971-1AA00-0AA0 | SIEMENS SIMATIC S7, BACKUP BATTERY (LI) 3.6 V/MIN. 0.85 AH, FOR FOR S7-300 CPUS AND S5-90U
- Siemens stlogo - Software Logo Comfort v8, Individual License

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*Product available on Desertcart Portugal*
*Store origin: PT*
*Last updated: 2026-01-27*