---
product_id: 619856992
title: "Blomiky 2 Pack 3.7V 1S JST Plug 1200mAh Li-ion Battery and USB Cable Suitable for Some RC Trucks QHX-557F Foam Blaster HJ821 RC Boat/ 557F Battery"
brand: "blomiky"
price: "€ 29.54"
currency: EUR
in_stock: true
reviews_count: 6
url: https://www.desertcart.pt/products/619856992-blomiky-2-pack-3-7v-1s-jst-plug-1200mah-li
store_origin: PT
region: Portugal
---

# 3.7V stable voltage output 1200mAh high-capacity power USB charging with overcurrent protection Blomiky 2 Pack 3.7V 1S JST Plug 1200mAh Li-ion Battery and USB Cable Suitable for Some RC Trucks QHX-557F Foam Blaster HJ821 RC Boat/ 557F Battery

**Brand:** blomiky
**Price:** € 29.54
**Availability:** ✅ In Stock

## Summary

> 🔋 Power your passion with precision and safety!

## Quick Answers

- **What is this?** Blomiky 2 Pack 3.7V 1S JST Plug 1200mAh Li-ion Battery and USB Cable Suitable for Some RC Trucks QHX-557F Foam Blaster HJ821 RC Boat/ 557F Battery by blomiky
- **How much does it cost?** € 29.54 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/619856992-blomiky-2-pack-3-7v-1s-jst-plug-1200mah-li)

## Best For

- blomiky enthusiasts

## Why This Product

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

## Key Features

- • **Safety First, Always:** Built-in 8.5A overcurrent protection ensures your battery and device stay safe under load.
- • **Compact & Lightweight:** Slim 66x22.4x18.6mm design weighing just 37g fits perfectly in your RC toys without bulk.
- • **Power Up Your Playtime:** 1200mAh Li-ion battery delivers extended run for uninterrupted RC fun.
- • **Versatile Compatibility:** Perfectly tailored for QHX-557F Foam Blasters, HJ821 RC Boats, and select RC cars—never worry about fit.
- • **Plug & Charge Convenience:** Includes USB cables with intuitive red/black JST plugs for hassle-free charging anywhere.

## Overview

The Blomiky 2 Pack 3.7V 1200mAh Li-ion rechargeable batteries come with USB charging cables and JST plugs, designed for seamless compatibility with QHX-557F Foam Blasters, HJ821 RC Boats, and select RC vehicles. Featuring overcurrent protection and a compact lightweight form factor, these batteries ensure longer playtime and safe, convenient charging for your remote control adventures.

## Features

- Voltage:3.7V 1S, li-ion rechargeable battery, battery capacity:1200mAh. Charging manual:USB cable Red light is solid when charging,red light is off after full charged.
- Discharge /charge plug: Red jst plug, red cable is positive polar, black cable is negative polar,
- There is 8.5A over current protection circuit on this battery. Battery dimensions: 66*22.4*18.6 mm/2.6*0.88*0.73inch, battery net weight:37grams
- 3.7V 1200mAh JST battery suitable for Minfex Automatic Toy foam blasters, battery suitable for Semour QHX-557F foam blasters.
- 3.7V 1200mAh JST Li-ion rechargeable battery suitable for some kind of RC Cars, HJ821 RC Boat, or RC Toys, which size, plug ,voltage all match.
- Package include: 2 Pack battery with JST plug, 2 pack USB cable
- Battery suitable for some kind of Remote control Boat, such as Bezgar HJ821 Remote control RC Boat, which use same plug , same voltage and size battery.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Antenna Location | QHX-557F Foam Blasters |
| Asin | B0CQQH16V2 |
| Battery Capacity | 1200 milliamp_hours |
| Battery Cell Type | Lithium Ion |
| Battery Weight | 37 g |
| Best Sellers Rank | #52,996 in Toys & Games (See Top 100 in Toys & Games) #125 in Hobby Remote & App Controlled Vehicle Batteries |
| Brand | Blomiky |
| Customer Reviews | 4.9 4.9 out of 5 stars (30) 4.9 out of 5 stars |
| Item Dimensions | 2.6 x 0.89 x 0.72 inches |
| Item Weight | 37 g |
| Manufacturer | BO FU NENG |
| Model Number | 557F |
| Number Of Batteries | 2 Lithium Ion batteries required. (included) |
| Reusability | Rechargeable |
| Unit Count | 2 Count |
| Voltage | 3.7 volts |
| Warranty Description | 6 month warranty |

## Product Details

- **Battery Capacity:** 1200 milliamp_hours
- **Battery Cell Composition:** Lithium Ion
- **Brand:** Blomiky
- **Number of Batteries:** 2 Lithium Ion batteries required. (included)
- **Recommended Uses For Product:** QHX-557F Foam Blasters

## Images

![Blomiky 2 Pack 3.7V 1S JST Plug 1200mAh Li-ion Battery and USB Cable Suitable for Some RC Trucks QHX-557F Foam Blaster HJ821 RC Boat/ 557F Battery - Image 1](https://m.media-amazon.com/images/I/71NsIak-x2L.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Replacement
*by  on Reviewed in the United States August 3, 2026*

Replacement for a nerf gun. They work.

### ⭐⭐⭐⭐⭐ Works for TEMU Foam Dart Blaster
*by  on Reviewed in the United States April 21, 2026*

Got these Batteries for my TEMU Full Foam Dart Uzi "Nerf" Blaster.

### ⭐⭐⭐⭐⭐ Perfect fit
*by  on Reviewed in the United States December 14, 2025*

Exactly what I wanted and it worked great, for my application

## Frequently Bought Together

- Blomiky 2 Pack 3.7V 1S JST Plug 1200mAh Li-ion Battery and Charger Cable for RC Trucks QHX-557F Foam Blaster / 557F Battery
- EBOOT 20 AWG JST Plug Connector 2 Pin Male Female Plug Connector Cable Wire for LED Lamp Strip RC Toys Battery, 10 Pairs

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.pt/products/619856992-blomiky-2-pack-3-7v-1s-jst-plug-1200mah-li](https://www.desertcart.pt/products/619856992-blomiky-2-pack-3-7v-1s-jst-plug-1200mah-li)

---

*Product available on Desertcart Portugal*
*Store origin: PT*
*Last updated: 2026-09-24*