---
product_id: 165909143
title: "CELLONIC 2x Battery compatible with Siemens x656, SL610H Pro, 4250366817255 | (850mAh-3.7V-Lithium Ion) for Siemens Gigaset SL4, Openstage, SL350, Professional, S30852-D2152-X1, for Telekom Sinus A806"
brand: "cellonic"
price: "€ 52.43"
currency: EUR
in_stock: true
url: https://www.desertcart.hr/products/165909143-cellonic-2x-battery-compatible-with-siemens-x656-sl610h-pro-4250366817255
store_origin: HR
region: Croatia
---

# 3.7V stable Lithium Ion cells Wide compatibility with Siemens Gigaset models 850mAh high-capacity power CELLONIC 2x Battery compatible with Siemens x656, SL610H Pro, 4250366817255 | (850mAh-3.7V-Lithium Ion) for Siemens Gigaset SL4, Openstage, SL350, Professional, S30852-D2152-X1, for Telekom Sinus A806

**Brand:** cellonic
**Price:** € 52.43
**Availability:** ✅ In Stock

## Summary

> 🔋 Power up your calls, stay connected longer!

## Quick Answers

- **What is this?** CELLONIC 2x Battery compatible with Siemens x656, SL610H Pro, 4250366817255 | (850mAh-3.7V-Lithium Ion) for Siemens Gigaset SL4, Openstage, SL350, Professional, S30852-D2152-X1, for Telekom Sinus A806 by cellonic
- **How much does it cost?** € 52.43 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/165909143-cellonic-2x-battery-compatible-with-siemens-x656-sl610h-pro-4250366817255)

## Best For

- cellonic enthusiasts

## Why This Product

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

## Key Features

- • **Backup Ready:** Keep a spare on hand to avoid downtime and stay connected when it matters most
- • **Long-Lasting Power:** Premium Lithium Ion cells deliver extended call time and fewer charging interruptions
- • **Cost-Effective Upgrade:** Extend your device’s life without the premium price of original batteries
- • **Seamless Compatibility:** Perfectly fits Siemens Gigaset SL400, SL450HX, SL78H & more for hassle-free replacement
- • **Reliable German Engineering:** Tested to strict standards ensuring durability and consistent performance

## Overview

This 850mAh, 3.7V Lithium Ion replacement battery is engineered for Siemens Gigaset SL400, SL450HX, SL78H, and SL78 models. It offers premium performance with long-lasting power, tested for durability under German standards, providing a cost-effective and reliable alternative to original batteries.

## Description

Full description not available

## Features

- Perfect Fit & Wide Compatibility – Replacement battery designed for seamless compatible with Siemens Gigaset SL400, Gigaset SL450HX, Gigaset SL78H, Gigaset SL78. Check the full list of compatibility in our product description
- Premium Performance & Long Battery Life – High-quality Lithium Ion cells provide stable, long-lasting power. Ideal as a replacement or backup battery, minimizing charging breaks and ensuring extended call time
- High-Capacity – 850mAhrechargeable battery delivering efficient and durable power. Rigorously tested to ensure excellent performance, extended lifespan, and consistent reliability
- Engineered for Reliability – Tested under strict German standards for durability and efficiency. A cost-effective alternative to original batteries, delivering strong performance without the premium price
- Smart & Cost-Effective Choice – Replacing the battery extends your device’s lifespan and reduces downtime. A reliable alternative to avoid full replacement costs while ensuring continued performance

## Product Details

- **Number of batteries:** 2 Product Specific batteries required.
- **Brand:** CELLONIC
- **Battery cell composition:** Lithium Ion
- **Battery capacity:** 850 Milliampere Hour (mAh)
- **Recommended uses for product:** Camera, Electronics, Gaming, Indoor, Office, Portable devices, Power banks, Smartphones, Tablet, Travel

## Images

![CELLONIC 2x Battery compatible with Siemens x656, SL610H Pro, 4250366817255 | (850mAh-3.7V-Lithium Ion) for Siemens Gigaset SL4, Openstage, SL350, Professional, S30852-D2152-X1, for Telekom Sinus A806 - Image 1](https://m.media-amazon.com/images/I/61h1j8cBymL.jpg)

## Available Options

This product comes in different **Size Name** options.

## Questions & Answers

**Q: Are CELLONIC batteries safe?**
A: Yes, we use premium-grade cells with built-in protection against over-voltage, short-circuits and overheating. Every battery pack is tested several times before it ships, ensuring reliable, smooth performance.

**Q: Is this battery compatible with my device?**
A: Match the model or part-number in our “Compatible with” list. If your device appears there, the battery fits perfectly—no adapters needed.

**Q: Can I replace the battery myself?**
A: Depending on the battery type, it will either simply fit in or require only basic tools and care. If the original is glued or soldered in, or you're not confident in changing it yourself, we recommend using a professional to avoid any damage.

**Q: Can I use a higher- or lower-capacity battery than the original that came with my device?**
A: Yes - as long as voltage and model compatibility match. Higher capacities deliver longer runtimes, lower capacities works the same but may run shorter.

**Q: Why choose CELLONIC over original, branded batteries?**
A: CELLONIC replacement batteries offer reliable performance at a lower cost. Our batteries meet the highest standards, ensuring safe, long-lasting power, the same if not better than your original.

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**Shop now:** [https://www.desertcart.hr/products/165909143-cellonic-2x-battery-compatible-with-siemens-x656-sl610h-pro-4250366817255](https://www.desertcart.hr/products/165909143-cellonic-2x-battery-compatible-with-siemens-x656-sl610h-pro-4250366817255)

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*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-10-16*