---
product_id: 332964612
title: "502540 3.7v Battery 550mAh for Sena SMH5 Motorcycles Bluetooth Headset Battery Replacement Sena SMH5-FM SMH5D SPH10H-FM Part Number (P/N): ICP40/25/40P fits Nextbase 312GW HD Recording DVR Cam"
brand: "hxjnldc"
price: "€ 18.80"
currency: EUR
in_stock: true
reviews_count: 8
url: https://www.desertcart.ie/products/332964612-502540-3-7v-battery-550mah-for-sena-smh5-motorcycles-bluetooth
store_origin: IE
region: Ireland
---

# 3.7V nominal voltage, 4.2V full charge 550mAh high-capacity power Advanced overcharge & short circuit protection 502540 3.7v Battery 550mAh for Sena SMH5 Motorcycles Bluetooth Headset Battery Replacement Sena SMH5-FM SMH5D SPH10H-FM Part Number (P/N): ICP40/25/40P fits Nextbase 312GW HD Recording DVR Cam

**Brand:** hxjnldc
**Price:** € 18.80
**Availability:** ✅ In Stock

## Summary

> 🔋 Power your ride and capture every moment—never miss a beat with the ultimate Sena SMH5 battery upgrade!

## Quick Answers

- **What is this?** 502540 3.7v Battery 550mAh for Sena SMH5 Motorcycles Bluetooth Headset Battery Replacement Sena SMH5-FM SMH5D SPH10H-FM Part Number (P/N): ICP40/25/40P fits Nextbase 312GW HD Recording DVR Cam by hxjnldc
- **How much does it cost?** € 18.80 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ie](https://www.desertcart.ie/products/332964612-502540-3-7v-battery-550mah-for-sena-smh5-motorcycles-bluetooth)

## 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

- • **DIY Friendly:** Includes heat shrinkable insulating sleeve and clear polarity guidance for easy, confident installation—even if you need to solder.
- • **Safety-First Design:** Equipped with Japanese Seiko IC protection against overcharge, overdischarge, overcurrent, and short circuits for worry-free use.
- • **Reliable Power Boost:** Keep your Sena SMH5 headset and Nextbase 312GW DVR running longer with a robust 550mAh lithium polymer battery.
- • **Compact & Lightweight:** Slim 5×25×41mm size and featherlight 11.5g weight make it the perfect discreet power upgrade for your gear.
- • **Precision Compatibility:** Designed specifically for Sena SMH5 series and Nextbase 312GW, ensuring seamless plug-and-play replacement without hassle.

## Overview

This 502540 lithium polymer battery delivers 550mAh at 3.7V nominal voltage, tailored for Sena SMH5 Bluetooth headsets and Nextbase 312GW HD DVR cams. Featuring advanced Japanese Seiko IC protection and a compact form factor, it ensures safe, reliable, and long-lasting power. Ideal for professional riders and tech-savvy users seeking a seamless, high-performance battery replacement.

## Description

Full description not available

## Features

- ★Compatible with Sena SMH5 Motorcycles Bluetooth Headset Battery Replacement,compatible models for Sena SMH5S,Sena SMH5-UNIV,Sena SMH5D,Sena SMH5D-UNIV,Sena SMH5-FM,Sena SMH5-FM-01,Sena SMH5-FM-UNIV, SPH10H-FM Battery Part Number (P/N): ICP40/25/40P fits Nextbase 312GW，HD Recording DVR Cam。Also suitable for DIY electronic products with 3.7-5V and less than 2.03Wh 550mAh built-in 2-wire battery replacement.（★ 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.
- ★502540 rechargeable lithium ion polymer battery, nominal voltage 3.7V, full charge voltage 4.2V, capacity 550mAh, power 2.03Wh, size 5×25×41mm(0.197×0.984×1.614inch）(T*W*L), Weight:11.5g(0.405oz)，Maximum current:0.5A。 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, 3302-26 high temperature resistant silicone cable, and genuine JST Pitch1.25mm 2-pin connector module.
- If there are any quality issues within a year, ★please feel free to contact us via email for replacement.
- ★Please carefully compare the polarity of the connector before use,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.

## Product Details

- **Number of Batteries:** 1 Lithium Polymer batteries required. (included)
- **Brand:** HXJNLDC
- **Battery Cell Composition:** Lithium Polymer
- **Battery Capacity:** 550 Milliamp Hours
- **Recommended Uses For Product:** Motorcycles

## Images

![502540 3.7v Battery 550mAh for Sena SMH5 Motorcycles Bluetooth Headset Battery Replacement Sena SMH5-FM SMH5D SPH10H-FM Part Number (P/N): ICP40/25/40P fits Nextbase 312GW HD Recording DVR Cam - Image 1](https://m.media-amazon.com/images/I/61E-EuIJfFL.jpg)

## Available Options

This product comes in different **Color, Size** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Yes this Absolutely fits and works on Sena 20s EVO
*by O***. on May 26, 2023*

My replacement Sena 20s EVO battery arrived today and I enjoyed 100% success installing it.The 20s evo install instructions are "scary" but very doable.I used youtube video /watch?v=x311Sux8PpoThe sena 20s evo was NOT designed to have its battery replaced.But just because it wasn't designed to be replaced doesn't mean it can't be done.Install instructions such as the above make it possible.YES this battery is about 1/32" wider and 1/16" longer than OEM.HOWEVER it still "fits" without any heroic efforts.I varied from video in two places. a) I used a loop of duct tape to affix the battery to its case vs using the OEM 2-sided tape. I did this because a loop of tape is way thinner makes up for any extra thickness batter might have. b) I used a piece of scotch tape to pin the cable to the battery side as to keep it out of the way during top circuit board insertion.when I was done my unit turn on all the functions worked.I have only owned this unit for a few hours but I know it accepts a full charge and all the evo functions work.Time will tell how long the battery will last.My old battery was 4 yrs old and didn't last long anymore.The picture with a yellow-sided battery is OEM, the picture with the silver battery is its replacement.

### ⭐⭐⭐⭐⭐ Perfect fit
*by C***0 on September 17, 2025*

Arrived on time, exactly as stated by seller , fits well in my Sena S20 & charges fast.. within an hour it was fully charged!

### ⭐⭐⭐⭐⭐ Great Battery But Be Advised
*by T***H on November 9, 2024*

This is a great little battery and it's small enough to fit in the available space on the Sena 20S. I installed my battery quickly but accidentally had one of the wires routed in the same space where the screw post is located. The pressure of closing the case broke one of the wires. So, then I had to drag out my soldering iron and resolder the wire. Advice: Don't get in a hurry and make sure the wires are free and clear when you close your Sena back up. Be aware that these wires are much more delicate than the original wires on the OEM battery.

## Frequently Bought Together

- 502540 3.7v Battery 550mAh for Sena SMH5 Motorcycles Bluetooth Headset Battery Replacement Sena SMH5-FM SMH5D SPH10H-FM Battery Part Number (P/N): ICP40/25/40P fits Nextbase 312GW HD Recording DVR Cam
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*Product available on Desertcart Ireland*
*Store origin: IE*
*Last updated: 2026-02-15*