---
product_id: 326535078
title: "3.7V 350mAh Replacement Battery for Sennheiser Flex 5000, RS 5000, Set 880 Digital Wireless Headphones, AHB571935PCT-03, BAP 800"
brand: "starnovo"
price: "€ 23.45"
currency: EUR
in_stock: true
reviews_count: 3
category: "Starnovo"
url: https://www.desertcart.it/products/326535078-3-7v-350mah-replacement-battery-for-sennheiser-flex-5000-rs
store_origin: IT
region: Italy
---

# 3.7V nominal voltage 300+ recharge cycles 350mAh capacity power 3.7V 350mAh Replacement Battery for Sennheiser Flex 5000, RS 5000, Set 880 Digital Wireless Headphones, AHB571935PCT-03, BAP 800

**Brand:** starnovo
**Price:** € 23.45
**Availability:** ✅ In Stock

## Summary

> 🔋 Power your premium sound, never miss a beat!

## Quick Answers

- **What is this?** 3.7V 350mAh Replacement Battery for Sennheiser Flex 5000, RS 5000, Set 880 Digital Wireless Headphones, AHB571935PCT-03, BAP 800 by starnovo
- **How much does it cost?** € 23.45 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.it](https://www.desertcart.it/products/326535078-3-7v-350mah-replacement-battery-for-sennheiser-flex-5000-rs)

## Best For

- starnovo enthusiasts

## Why This Product

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

## Key Features

- • **Certified Safety:** UL, CE, UN38.3 & RoHS certified for peace of mind
- • **Long-Lasting Power:** 350mAh Li-ion Polymer battery keeps you unplugged longer
- • **Durable Performance:** Over 300 recharge cycles for extended headphone life
- • **Compact & Lightweight:** Slim 5.0 x 20.5 x 37.0mm design, just 10g
- • **Seamless Compatibility:** 100% fits Sennheiser Flex 5000 & RS 5000 models

## Overview

This 3.7V 350mAh Li-ion Polymer replacement battery is engineered for Sennheiser Flex 5000, RS 5000, and Set 880 wireless headphones. Certified for safety and reliability, it delivers over 300 recharge cycles with a compact, lightweight design, ensuring your high-end audio gear stays powered longer and performs at its best.

## Description

Battery Type: Li-ion Polymer battery Capacity: 350mAh Nominal Voltage: 3.7V Pack Dimension: 5.0 x 20.5 x 37.0mm Weight: 10g Working Temperature: Less than 60℃(140℉) Compatible Models: Sennheiser Flex 5000, RS 5000, Set 880Compatible Bat1tery Models: AHB571935PCT-03, BAP 800

Review: replacement battery - it does the job and it fits
Review: I think I got a lemon - This battery only lasted a little over two months.

## Features

- Replacement Battery for: Sennheiser Flex 5000, RS 5000, Set 880 Digital Wireless Headphones, AHB571935PCT-03, BAP 800
- 100% Compatible with original battery; 180 days warranty
- Capacity: 350mAh; Nominal Voltage: 3.7V
- Battery Type: Li-ion Polymer battery; Safe and reliable battery certified by UL, CE, UN38.3, RoHS
- Over 300 times cycle life; Long working time

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08GBVLP9D |
| Batteries | 1 Lithium Polymer batteries required. (included) |
| Best Sellers Rank | #654,555 in Health & Household ( See Top 100 in Health & Household ) #2,292 in 3.7V Batteries |
| Customer Reviews | 3.8 3.8 out of 5 stars (6) |
| Date First Available | September 12, 2019 |
| Item Weight | 0.282 ounces |
| Item model number | SNO-502035PCN |
| Manufacturer | Starnovo |
| Package Dimensions | 2.76 x 1.73 x 0.59 inches |

## Product Details

- **Battery Capacity:** 350 Milliamp Hours
- **Battery Cell Composition:** Lithium Polymer
- **Brand:** STARNOVO
- **Number of Batteries:** 1 Lithium Polymer batteries required. (included)
- **Recommended Uses For Product:** digital

## Images

![3.7V 350mAh Replacement Battery for Sennheiser Flex 5000, RS 5000, Set 880 Digital Wireless Headphones, AHB571935PCT-03, BAP 800 - Image 1](https://m.media-amazon.com/images/I/51XHJxPrdpL.jpg)
![3.7V 350mAh Replacement Battery for Sennheiser Flex 5000, RS 5000, Set 880 Digital Wireless Headphones, AHB571935PCT-03, BAP 800 - Image 2](https://m.media-amazon.com/images/I/51xVCcSfn5L.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ replacement battery
*by W***E on September 18, 2025*

it does the job and it fits

### ⭐ I think I got a lemon
*by M***B on December 29, 2025*

This battery only lasted a little over two months.

### ⭐⭐⭐⭐⭐ Worked perfectly for Sennheiser Flex 5000 transmitter
*by C***S on July 1, 2023*

Got this to replace the stock battery that comes in the Flex 5000 transmitter unit for remote headphones. The original battery was getting low evidenced by the sound cutting in and out. This new battery fixed that. Recharges nicely and seems to be of equal or parallel quality to the original. A little overpriced imo but it works.

## Frequently Bought Together

- STARNOVO 3.7V 350mAh Replacement Battery for Sennheiser Flex 5000, RS 5000, Set 880 Digital Wireless Headphones, AHB571935PCT-03, BAP 800
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*Product available on Desertcart Italy*
*Store origin: IT*
*Last updated: 2026-02-20*