---
product_id: 436344926
title: "DC 3.7v 1150mAh 102540 Rechargeable Polymer Lithium Battery for Sena 50S Motorcycles Bluetooth Headset Intercom Battery Replacement DIY 3.7-5V Electronic Product"
brand: "hxjnldc"
price: "¥5979"
currency: JPY
in_stock: true
reviews_count: 13
category: "Hxjnldc"
url: https://www.desertcart.jp/products/436344926-dc-3-7v-1150mah-102540-rechargeable-polymer-lithium-battery-sena
store_origin: JP
region: Japan
---

# 3.7V nominal voltage, 4.2V full charge 1150mAh high-capacity power Built-in overcharge & short circuit protection DC 3.7v 1150mAh 102540 Rechargeable Polymer Lithium Battery for Sena 50S Motorcycles Bluetooth Headset Intercom Battery Replacement DIY 3.7-5V Electronic Product

**Brand:** hxjnldc
**Price:** ¥5979
**Availability:** ✅ In Stock

## Summary

> 🔋 Power up your Sena 50S — never miss a call or ride!

## Quick Answers

- **What is this?** DC 3.7v 1150mAh 102540 Rechargeable Polymer Lithium Battery for Sena 50S Motorcycles Bluetooth Headset Intercom Battery Replacement DIY 3.7-5V Electronic Product by hxjnldc
- **How much does it cost?** ¥5979 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/436344926-dc-3-7v-1150mah-102540-rechargeable-polymer-lithium-battery-sena)

## Best For

- hxjnldc enthusiasts

## Why This Product

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

## Key Features

- • **Lightweight & Compact:** At just 19.4g, this lithium polymer battery keeps your headset sleek and comfortable without bulk.
- • **Safe & Smart Charging:** Integrated Japanese Seiko IC safeguards against overcharge, overdischarge, and short circuits for reliable performance.
- • **Power Your Ride All Day:** 1150mAh capacity ensures extended Bluetooth headset use without constant recharging.
- • **DIY-Ready with Pro Tools:** Includes heat-shrink tubing and clear wiring guidance for confident, professional-grade battery replacement.
- • **Precision Fit for Sena 50S:** Custom-sized 41×25×10mm battery designed to seamlessly replace your Sena 50S battery for uninterrupted communication.

## Overview

This DC 3.7V 1150mAh rechargeable lithium polymer battery is engineered for Sena 50S motorcycle Bluetooth headsets and compatible 3.7-5V electronics under 4.25Wh. Featuring a compact 41×25×10mm form factor and weighing only 19.4g, it delivers reliable power with built-in Japanese Seiko IC protection against overcharge, overdischarge, and short circuits. Designed for DIY replacement, it includes heat-shrink tubing and clear polarity instructions to ensure a safe, precise fit and extended device lifespan.

## Description

Product description DC 3.7V Model Table of Square Rechargeable Polymer Lithium Battery (applicable to 3.7V-5V electronic products) Please note that connector specifications and polarity are based on the product display image., the red wire is the positive "+" and the black wire is the negative "-"The yellow ( white) lead is a 'thermistor'，Do not reverse-charge or reverse-connectreverse. 3 -wi r e batteries retain red and black wires, which can replace 2 -wi r e batteries. Some products' original batteries may lack plugs, have incompatible plugs, or exhibit mismatched polarity. No worries—you can simply cut the wires and use the included heat-shrink tubing to connect the wires of the same color from the old plug.

Review: Small Change vs Replacing a Sena 50$ - Rating the battery life and value for the money would take six stars. Easy to install? Maybe not so much in a 50S. After three seasons, the last with little or no runtime, it was like getting a new radio. Then after a few weeks of LD riding, the (four so far) batteries I've replaced for family and friends are still going strong, on mesh, noise cancelling, bt Garmin + audio stream to some decent HK speakers, occasional incoming phone calls... all, day, long. It needs to be made simpler to replace batteries like these. They work very hard through hundreds of all-weather cycles. The lifespan of batteries like these should not be expected to determine the life span of pricey devices. Not sure I would recommend this job to someone unfamiliar with this kind of DIY repair, or with unsteady hands. I paused a YT video each step my first two replacements - and I am familiar with this sort of thing. The 50S needs to be opened carefully and reassembled correctly. There is little or no wiggle space for wires, the gasket, edges of the battery, etc. I since found a $10 USD "phone repair" tool kit with plastic and metal pry tools, tweezers, handy screwdrivers and other things all in one zippered pouch that make this type of repair much-much easier. Adequate light and clear focus or magnification also. *I believe the 50S new is sold as weather resistant and mine have delivered that much. Opening the radio you'll see small dots of clear sealant over the recessed screw heads, the gasket you'll see around the perimeter seam, and a few other places Sena saw fit to use sealant. Putting the radio back together without resealing will make your 50S less weather resistant. I try to use a moderate output charger (that 1A white cube) on Sena's Wi-Fi cable, then not leave everything plugged in after the red LED turns blue. These are a relatively small capacity class of battery. Not much gain trying to use a higher output quick charger. The 50S is apparently calibrated to show 100% at 1000mAh, so don't be surprised to see ~110% battery level in the Sena phone app. ;-)
Review: Battery last longer than ever. - Battery worked perfectly. Only issue for me was I put it into a Sena 50s and it is just a little larger than the original battery so the fit was very tight and made it harder to close back up. It worked great and the headset last longer than it ever did so even though fitment issue is true I would buy it again because the result was really good.

## Features

- Compatible with Sena 50S Motorcycles Bluetooth Headset Battery Replacement。It can also be used in other 3.7-5V electronic products with power less than 4.25Wh (1150mAh).（★ Not applicable to high-power electric tools and model aircraft）
- Please compare the connector specifications and polarity according to the display diagram before purchasing,★the red wire is the positive "+" and the black wire is the negative "-"，Do not reverse-charge or reverse-connectreverse. ★The primary battery of some products has no plug or mismatched plug or mismatched polarity. It doesn't matter, you can cut and solder the plug directly or use our heat shrinkable insulating sleeve to connect the same color wire.
- 102540 rechargeable lithium ion polymer battery, nominal voltage 3.7V, full charge voltage 4.2V, capacity 1150mAh, power 4.25Wh, ★size 41×25×10mm(1.614×0.984×0.393inch）(L*W*T), Weight:19.4g(0.679oz)，Maximum current:1.1A。 It can prevent overcharge, overdischarge, overcurrent, and short circuit.
- It‘s consists of of large-capacity A+ lithium battery, Japanese Seiko IC overcharge and overcurrent short circuit protection board, 3302-28 high temperature resistant silicone cable, and genuine JST Pitch 1.0mm ★2 wire connector module.
- If there are any quality issues within a year, ★please feel free to contact us via email for replacement.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B09T3B1D1V |
| Amperage | 1 Amps |
| Antenna Location | Motorcycles |
| Battery Capacity | 1000 Milliamp Hours |
| Battery Cell Composition | Lithium Polymer |
| Battery Cell Type | Lithium Polymer |
| Battery Weight | 21 Grams |
| Best Sellers Rank | #304,993 in Health & Household ( See Top 100 in Health & Household ) #583 in 3.7V Batteries |
| Brand | HXJNLDC |
| Customer Reviews | 3.8 out of 5 stars 158 Reviews |
| Item Dimensions | 1.59 x 0.98 x 0.43 inches |
| Item Weight | 29 Grams |
| Manufacturer | HXJN |
| Model Name | 102540 |
| Model Number | 402030 |
| Number of Batteries | 1 C batteries required. (included) |
| Recommended Uses For Product | Motorcycles |
| Reusability | Rechargeable |
| UPC | 757842612792 |
| Unit Count | 1.0 Count |
| Voltage | 3.7 Volts (DC) |

## Product Details

- **Battery Capacity:** 1000 Milliamp Hours
- **Battery Cell Composition:** Lithium Polymer
- **Brand:** HXJNLDC
- **Number of Batteries:** 1 C batteries required. (included)
- **Recommended Uses For Product:** Motorcycles

## Images

![DC 3.7v 1150mAh 102540 Rechargeable Polymer Lithium Battery for Sena 50S Motorcycles Bluetooth Headset Intercom Battery Replacement DIY 3.7-5V Electronic Product - Image 1](https://m.media-amazon.com/images/I/61KeC80ARiL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Small Change vs Replacing a Sena 50$
*by C***S on May 28, 2023*

Rating the battery life and value for the money would take six stars. Easy to install? Maybe not so much in a 50S. After three seasons, the last with little or no runtime, it was like getting a new radio. Then after a few weeks of LD riding, the (four so far) batteries I've replaced for family and friends are still going strong, on mesh, noise cancelling, bt Garmin + audio stream to some decent HK speakers, occasional incoming phone calls... all, day, long. It needs to be made simpler to replace batteries like these. They work very hard through hundreds of all-weather cycles. The lifespan of batteries like these should not be expected to determine the life span of pricey devices. Not sure I would recommend this job to someone unfamiliar with this kind of DIY repair, or with unsteady hands. I paused a YT video each step my first two replacements - and I am familiar with this sort of thing. The 50S needs to be opened carefully and reassembled correctly. There is little or no wiggle space for wires, the gasket, edges of the battery, etc. I since found a $10 USD "phone repair" tool kit with plastic and metal pry tools, tweezers, handy screwdrivers and other things all in one zippered pouch that make this type of repair much-much easier. Adequate light and clear focus or magnification also. *I believe the 50S new is sold as weather resistant and mine have delivered that much. Opening the radio you'll see small dots of clear sealant over the recessed screw heads, the gasket you'll see around the perimeter seam, and a few other places Sena saw fit to use sealant. Putting the radio back together without resealing will make your 50S less weather resistant. I try to use a moderate output charger (that 1A white cube) on Sena's Wi-Fi cable, then not leave everything plugged in after the red LED turns blue. These are a relatively small capacity class of battery. Not much gain trying to use a higher output quick charger. The 50S is apparently calibrated to show 100% at 1000mAh, so don't be surprised to see ~110% battery level in the Sena phone app. ;-)

### ⭐⭐⭐⭐ Battery last longer than ever.
*by K***C on February 21, 2026*

Battery worked perfectly. Only issue for me was I put it into a Sena 50s and it is just a little larger than the original battery so the fit was very tight and made it harder to close back up. It worked great and the headset last longer than it ever did so even though fitment issue is true I would buy it again because the result was really good.

### ⭐⭐⭐⭐⭐ Tight fit but works
*by J***N on May 9, 2024*

UPDATE!! Deffinatly larger than original battery kinda tough to get it placed right but works great so far just follow youtube videos I did mine in less than 15 min battery so far does not last as long as the original but seems to be getting better with use

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-07-18*