---
product_id: 388165355
title: "Voltaic Systems V25 6,400mAh USB Always On Battery Backup Power Bank for iPhone, iPad, Samsung Galaxy, Android, and HTC Devices (Gray)"
brand: "voltaic systems"
price: "VT43097"
currency: VUV
in_stock: true
reviews_count: 5
category: "Voltaic Systems"
url: https://www.desertcart.vu/products/388165355-voltaic-systems-v25-6-400mah-usb-always-on-battery-backup
store_origin: VU
region: Vanuatu
---

# Always-on 5V USB output Seamless auto-restart on recharge 6,400mAh high-capacity power Voltaic Systems V25 6,400mAh USB Always On Battery Backup Power Bank for iPhone, iPad, Samsung Galaxy, Android, and HTC Devices (Gray)

**Brand:** voltaic systems
**Price:** VT43097
**Availability:** ✅ In Stock

## Summary

> 🔌 Power that never quits—your pocket-sized UPS for the digital age!

## Quick Answers

- **What is this?** Voltaic Systems V25 6,400mAh USB Always On Battery Backup Power Bank for iPhone, iPad, Samsung Galaxy, Android, and HTC Devices (Gray) by voltaic systems
- **How much does it cost?** VT43097 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.vu](https://www.desertcart.vu/products/388165355-voltaic-systems-v25-6-400mah-usb-always-on-battery-backup)

## Best For

- voltaic systems enthusiasts

## Why This Product

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

## Key Features

- • **Built-In USB UPS:** Acts as an uninterruptible power supply for your USB devices, protecting against power outages and surges.
- • **Compact Yet Mighty:** Mini form factor packs a hefty 6,400mAh capacity for all-day mobile productivity.
- • **True Always-On Tech:** Unlike typical power banks, it never shuts off due to low current draw—perfect for microcontrollers and sensitive gear.
- • **Plug, Play & Recharge:** Automatically restarts output when plugged in, so your devices never miss a beat.
- • **Unstoppable Power Flow:** Keeps your devices charged even while recharging—no more downtime or resets.

## Overview

The Voltaic Systems V25 is a premium 6,400mAh USB power bank designed for professionals who demand uninterrupted power. Its unique always-on output ensures continuous 5V supply even during low current draw, making it ideal for smartphones, tablets, microcontrollers, and sensitive electronics. Unlike standard power banks, it auto-restarts output immediately upon recharge, effectively functioning as a portable uninterruptible power supply (UPS). Compact and reliable, it safeguards your devices from power interruptions while on the go or at home.

## Description

Shop Voltaic Systems V25 6,400mAh USB Always On Battery Backup Power Bank for iPhone, iPad, Samsung Galaxy, Android, and HTC Devices (Gray). Free delivery and returns on eligible orders.

Review: Truly "always on," ideal for rechargeable microcontroller projects, IoT, remote sensors, etc.
Review: these are incredible. i have 5 of them. can work as a USB device "UPS"

## Features

- Auto Shut Off

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07ZS3WYZY |
| Amperage | 2 Amps |
| Battery Capacity | 6400 Milliamp Hours |
| Battery capacity | 6400 Milliamp Hours |
| Best Sellers Rank | 2,456 in Mobile Phone Portable Power Banks |
| Brand | Voltaic Systems |
| Brand Name | Voltaic Systems |
| Compatible Devices | Smartphone, Tablet |
| Compatible Phone Models | Htc,Iphone |
| Connector Type | Usb |
| Connector type | Usb |
| Country of Origin | China |
| Customer Reviews | 4.4 out of 5 stars 163 Reviews |
| Item Dimensions | 9.1 x 8.4 x 3 centimetres |
| Manufacturer | FENRIR |
| Model Number | V25 |
| Number of Batteries | 1 Nonstandard Battery batteries required. |
| Other Special Features of the Product | Auto Shut Off |
| Output Current | 1 Amps |
| Power Source | Corded Electric |
| Power source | Corded Electric |
| Reusability | Rechargeable |
| Special feature | Auto Shut Off |
| Unit Count | 1.0 count |
| Voltage | 5 Volts |

## Product Details

- **Battery capacity:** 6400 Milliamp Hours
- **Brand:** Voltaic Systems
- **Connector type:** Usb
- **Special feature:** Auto Shut Off
- **Voltage:** 5 Volts

## Images

![Voltaic Systems V25 6,400mAh USB Always On Battery Backup Power Bank for iPhone, iPad, Samsung Galaxy, Android, and HTC Devices (Gray) - Image 1](https://m.media-amazon.com/images/I/514vy5FZUIL.jpg)
![Voltaic Systems V25 6,400mAh USB Always On Battery Backup Power Bank for iPhone, iPad, Samsung Galaxy, Android, and HTC Devices (Gray) - Image 2](https://m.media-amazon.com/images/I/61Myn4YoRUL.jpg)
![Voltaic Systems V25 6,400mAh USB Always On Battery Backup Power Bank for iPhone, iPad, Samsung Galaxy, Android, and HTC Devices (Gray) - Image 3](https://m.media-amazon.com/images/I/61WwpOy54NL.jpg)
![Voltaic Systems V25 6,400mAh USB Always On Battery Backup Power Bank for iPhone, iPad, Samsung Galaxy, Android, and HTC Devices (Gray) - Image 4](https://m.media-amazon.com/images/I/71IqAg4knhL.jpg)
![Voltaic Systems V25 6,400mAh USB Always On Battery Backup Power Bank for iPhone, iPad, Samsung Galaxy, Android, and HTC Devices (Gray) - Image 5](https://m.media-amazon.com/images/I/71VuKvAM8CL.jpg)

## Questions & Answers

**Q: where is this made?**
A: Both of mine were made in China, mine are the smaller ones that I use to power a camera that won't draw enough current to keep other batteries from shutting down.

**Q: Can you connect 2 units together for double the charge  ?**
A: Hello - if you mean double the capacity, we would suggest using the V50 - https://www.amazon.com/Voltaic-Systems-Always-External-Battery/dp/B00XZ7YU4M/

If you mean double the current (4A), it is possible with something like this "splitter" cable - https://www.amazon.com/HIGHROCK-Enhancer-Female-Charge-Extension/dp/B00NIGO4NM/r

**Q: How do you know when it's fully charged ?**
A: If connected to a power source like USB or a 5 or 6 Volt solar panel, the lights will blink when charging. When fully charged, all 4 LEDs will turn solid.

**Q: Can I plug in into a wall outlet & keep drawing power from it always? I do not have any solar need. Any other product recommendation for my purposes?**
A: Yes, the V25 has "pass through charging." It can accept a full charge and discharge at the full rate at the same time. If your power shuts off, there is no lag in power to your device. Customers do use it as a UPS.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Truly "always on," ideal for rechargeable microcontroller projects, IoT, remote sensors, etc.
*by J***E on 17 December 2022*



### ⭐⭐⭐⭐⭐ these are incredible. i have 5 of them. can work as a USB device "UPS"
*by H***N on 7 August 2021*



### ⭐⭐⭐⭐⭐ Always On = Best Option for Haslab Proton Pack power bank
*by T***A on 21 March 2023*



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**Shop now:** [https://www.desertcart.vu/products/388165355-voltaic-systems-v25-6-400mah-usb-always-on-battery-backup](https://www.desertcart.vu/products/388165355-voltaic-systems-v25-6-400mah-usb-always-on-battery-backup)

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*Product available on Desertcart Vanuatu*
*Store origin: VU*
*Last updated: 2026-02-10*