---
product_id: 644468718
title: "VX4 Visible Mixer 1.5V/3.6V/3.7V Li-Ion 3.2V LiFePO4 1.2V Ni-MH Batteries Charger and Battery Capacity Tester"
brand: "xtar"
price: "AR$167388"
currency: ARS
in_stock: true
reviews_count: 4
category: "Xtar"
url: https://www.desertcart.com.ar/products/644468718-vx4-visible-mixer-1-5v-3-6v-3-7v-li
store_origin: AR
region: Argentina
---

# 20W PD fast charging, 3A per slot Real-time LCD capacity & mWh display 4-slot multi-chemistry charging VX4 Visible Mixer 1.5V/3.6V/3.7V Li-Ion 3.2V LiFePO4 1.2V Ni-MH Batteries Charger and Battery Capacity Tester

**Brand:** xtar
**Price:** AR$167388
**Availability:** ✅ In Stock

## Summary

> 🔌 Power smarter, last longer — the XTAR VX4 keeps your batteries battle-ready!

## Quick Answers

- **What is this?** VX4 Visible Mixer 1.5V/3.6V/3.7V Li-Ion 3.2V LiFePO4 1.2V Ni-MH Batteries Charger and Battery Capacity Tester by xtar
- **How much does it cost?** AR$167388 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.ar](https://www.desertcart.com.ar/products/644468718-vx4-visible-mixer-1-5v-3-6v-3-7v-li)

## Best For

- xtar enthusiasts

## Why This Product

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

## Key Features

- • **Rapid & Safe Power-Up:** 20W PD adapter delivers up to 3A per slot with smart CVSA and 3-stage charging tech for fast, safe, and optimized battery life.
- • **Built-In Battery Rehab:** Higher recovery success for over-discharged batteries means fewer replacements and more sustainable power cycles.
- • **Universal Compatibility:** Supports 1.5V Li-ion, 3.6/3.7V Li-ion, 3.2V LiFePO4, and 1.2V Ni-MH batteries—one charger to rule them all.
- • **Charge & Test Like a Pro:** Simultaneously charge and capacity-test up to 4 batteries of different chemistries and sizes with precision.
- • **Next-Level Battery Insight:** Unique mWh energy readout reveals true battery health beyond simple voltage checks—never get caught with weak power again.

## Overview

The XTAR VX4 is a cutting-edge 4-slot battery charger and capacity tester designed for professional-grade management of 1.5V/3.6V/3.7V Li-ion, 3.2V LiFePO4, and 1.2V Ni-MH batteries. Featuring a bright LCD for real-time mAh and mWh monitoring, it supports fast 20W PD charging with up to 3A per slot and employs intelligent charging algorithms including CVSA and 3-stage charging for optimal battery health and longevity. Its unique ability to fully charge, discharge, and recharge batteries enables precise capacity testing and recovery of over-discharged cells, making it an indispensable tool for tech-savvy professionals who demand reliable, efficient power management.

## Description

Buy XTAR VX4 Visible Mixer 1.5V/3.6V/3.7V Li-Ion 3.2V LiFePO4 1.2V Ni-MH Batteries Charger and Battery Capacity Tester: Battery Chargers - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Good value - The charger is working well with my AA NiMH batteries and my 18650 cells. Measuring the capacity is particularly useful when you have a bunch of old batteries and are not sure which are working well enough to use. In my experience the charger always detected the battery type correctly and always applied the correct charge voltage. I don't know how the algorithm works, but it does work. Personally I would feel more comfortable with a switch for setting the voltage.
Review: Charger & Battery Capacity Tester, not an Instant Charge Tester (Full Review) - This is a great charger and capacity tester for Lithium (Li-Ion & LiFePO4) and NiMh batteries; it does not do alkaline, Ni-Cad, or other types of rechargeable batteries. It comes with a nice well made pouch, USB-C charge cable & AC adapter (must use included adapter for full battery charge power & functionality to the unit), and instructions. The lettering in the instructions was super small, so I had to scan it, then print it in a magnified format (see attached in English for your convenience). First, some terminology for consistency: • mWh stands for milliwatt-hours and represents the total energy a battery can store and deliver. • mAh stands for milliampere-hour and represents the battery's capacity, indicating how much electrical charge a battery can hold. I've used this unit to test several brands of rechargeable AA Li-Ion batteries (see links below for my reviews). None, not one, reached their advertised mWh capacities. In their reviews, many claimed that the batteries were "great" and lasted longer than their NiMh and Alkaline batteries, which is to be expected, however, "great" doesn't mean they lived up to their advertised capacities. This unit will definitively tell you. Lithium batteries discharge at a consistent 1.5V from beginning to end, even when the charge is very low and near 100% depletion, so a regular instant battery tester doesn't work as it will show a lithium battery as being consistently and fully charged until there was about 0% charge left (eg. a 10% charged battery would still show as 100% fully charged). However, 100% charged doesn't mean the battery is charged to it's max capacity, only that the battery has reached the limit of its storage capacity. Think of it this way: an old rechargeable battery that has a diminished capacity, will only charge up to that level, and still show 100%. This unit can do two functions: 1) charge-only, 2) determine battery charge levels (mAh and the mWh). ***You cannot just put batteries into the unit for an instant charge level test due to the above*** To just charge the batteries, plug the unit in to the wall, select the "charge" function, then put the batteries into the unit. Although it will self-detect the type of battery you put in, you can manually select it as well (it will override your selection if the battery type is different). To determine the battery's charge capacity, the unit will first fully charging the battery(s), then fully discharging them (the battery capacity levels are determined here), then fully charging them again so you can use them (C-D-C). During the discharge phase, it will continuously calculate the charge level as it depletes. When the full CDC cycle completes, the unit will display "Done" with both mAh & mWh for lithium batteries, and just mAh for NiMh batteries. Understandably, this process can take several hours depending on the actual charge capacity of the batteries; the higher the capacity, the longer it will take. The nice thing is that you can charge any number of batteries, up to 4 total, and each battery can be a different size and type (eg. AAA NiMh with AA Li-Ion and AA LiFePO4). Size is a bit larger than I expected (6.77"L x 5.11"W x 1.63"H), but with the robust displays for each battery and number of batteries it can simultaneously handle, it makes sense. Below are reviews to the Li-Ion rechargeable batteries that I've tested, none that charge close to their advertised capacities: My XTAR Lithium (Li-Ion) AA Battery Review: https://www.desertcart.com/gp/customer-reviews/RSUM0LDFT2FPX My SincehHoly Lithium (Li-Ion) AA Battery Review: https://www.desertcart.com/gp/customer-reviews/R390K7RXXBV8VN My Delgeo Lithium (Li-Ion) AA Battery Review: https://www.desertcart.com/gp/customer-reviews/R2OPXD8DHSCY37 My RayHom Lithium (Li-Ion) AA Battery Review: https://www.desertcart.com/gp/customer-reviews/R2Z9KF179P01ZH

## Features

- 1.5V Li-ion Battery Capacity Tester: The first capacity tester designed specifically for 1.5V Li-ion batteries is also compatible with 3.6/3.7V Li-ion batteries and 1.2V Ni-MH batteries. With its LCD screen providing real-time charging status, it's easy to monitor the charging process. Moreover, the one-button switch to mWh energy display meets the specific requirements of devices, resulting in more efficient battery utilization
- Mixed Battery Charging: The charger features full battery-type charging and capacity separation functions, supporting two modes. In default mode, it automatically recognizes and charges 3.6/3.7V Li-ion batteries, as well as 1.2V Ni-MH batteries and 1.5V Li-ion batteries. In LiFePO4 mode, it automatically identifies and charges LiFePO4 lithium iron phosphate batteries, along with 1.2V Ni-MH batteries and 1.5V Li-ion batteries
- Smart Charging Experience: Equipped with a 20W PD adapter, each slot supports a maximum charging current of 3A, allowing for rapid charging of a 26650 6000mAh battery in just 3.3 hours. It includes manual current selection functionality. MH-Ni batteries benefit from unique CVSA technology, ensuring safe usage between 0-40℃ without risk of overheating. Li-ion batteries benefit from a 3-stage charging process, delivering precise, fast charging for an extended lifespan.
- Higher recovery success rate for over-discharged batteries,Intelligent optimal charging strategy matching
- Built-in multiple protections for charging safety; Package included: 1pcs VX4 Charger, 1pcs PD2.0 US Adapter, 1pcs C-C cable,manual

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0D6VS3XLY |
| Customer Reviews | 4.5 4.5 out of 5 stars (79) |
| Date First Available | June 12, 2024 |
| Item Weight | 11.1 ounces |
| Item model number | XTAR VX4 |
| Manufacturer | ShenZhen XTAR Electronics Co., Ltd |
| Product Dimensions | 1.63 x 5.11 x 6.77 inches |

## Product Details

- **Brand:** XTAR
- **Color:** Black
- **Item Weight:** 315 Grams
- **Output Voltage:** 11 Volts (DC)
- **Product Dimensions:** 1.63"D x 5.11"W x 6.77"H

## Images

![VX4 Visible Mixer 1.5V/3.6V/3.7V Li-Ion 3.2V LiFePO4 1.2V Ni-MH Batteries Charger and Battery Capacity Tester - Image 1](https://m.media-amazon.com/images/I/61lSRIVIPOL.jpg)

## Questions & Answers

**Q: How is the capacity grading accuracy of VX4 charger?**
A: The VX4 charger uses a 300mA discharge current to test battery capacity. Under the comparison test of the XTAR lab, with the same test condition, a randomly picked XTAR 1.5V AA 1200mWh battery had real capacity 1161mWh by VX4 charger,

**Q: I tested XTAR 4150mWh with VX4, the value is only 3500-3750mWh, is this normal ?**
A: XTAR AA 1.5V 4150mWh Li-ion battery, the original cell is 3.6V rated capacity of 1150mAh; the original cell's power is: 3.6V * 1150mAh = 4140mWh; this is also the origin of our labeling 4150mWh.

**Q: I tested XTAR 4150mWh with VX4, the value is only 3500-3750mWh, is this normal ?**
A: When converting a 3.6V primary cell battery to a 1.5V constant voltage lithium battery, there is a loss of about 10% due to the influence of the protection board and the bucking circuit; the actual tested capacity is around 3750mWh.

**Q: For 3.6/3.7V Li-ion battery, would the set of 2.5V discharge cut-off voltage cause a over-discharging?**
A: No, it won't. According to the international testing standard IEC 61960-3 2017, the discharge cut-off voltage for 3.6/3.7V Li-ion batteries is 2.5V.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good value
*by D***K on September 19, 2025*

The charger is working well with my AA NiMH batteries and my 18650 cells. Measuring the capacity is particularly useful when you have a bunch of old batteries and are not sure which are working well enough to use. In my experience the charger always detected the battery type correctly and always applied the correct charge voltage. I don't know how the algorithm works, but it does work. Personally I would feel more comfortable with a switch for setting the voltage.

### ⭐⭐⭐⭐⭐ Charger & Battery Capacity Tester, not an Instant Charge Tester (Full Review)
*by M***Y on August 30, 2025*

This is a great charger and capacity tester for Lithium (Li-Ion & LiFePO4) and NiMh batteries; it does not do alkaline, Ni-Cad, or other types of rechargeable batteries. It comes with a nice well made pouch, USB-C charge cable & AC adapter (must use included adapter for full battery charge power & functionality to the unit), and instructions. The lettering in the instructions was super small, so I had to scan it, then print it in a magnified format (see attached in English for your convenience). First, some terminology for consistency: • mWh stands for milliwatt-hours and represents the total energy a battery can store and deliver. • mAh stands for milliampere-hour and represents the battery's capacity, indicating how much electrical charge a battery can hold. I've used this unit to test several brands of rechargeable AA Li-Ion batteries (see links below for my reviews). None, not one, reached their advertised mWh capacities. In their reviews, many claimed that the batteries were "great" and lasted longer than their NiMh and Alkaline batteries, which is to be expected, however, "great" doesn't mean they lived up to their advertised capacities. This unit will definitively tell you. Lithium batteries discharge at a consistent 1.5V from beginning to end, even when the charge is very low and near 100% depletion, so a regular instant battery tester doesn't work as it will show a lithium battery as being consistently and fully charged until there was about 0% charge left (eg. a 10% charged battery would still show as 100% fully charged). However, 100% charged doesn't mean the battery is charged to it's max capacity, only that the battery has reached the limit of its storage capacity. Think of it this way: an old rechargeable battery that has a diminished capacity, will only charge up to that level, and still show 100%. This unit can do two functions: 1) charge-only, 2) determine battery charge levels (mAh and the mWh). ***You cannot just put batteries into the unit for an instant charge level test due to the above*** To just charge the batteries, plug the unit in to the wall, select the "charge" function, then put the batteries into the unit. Although it will self-detect the type of battery you put in, you can manually select it as well (it will override your selection if the battery type is different). To determine the battery's charge capacity, the unit will first fully charging the battery(s), then fully discharging them (the battery capacity levels are determined here), then fully charging them again so you can use them (C-D-C). During the discharge phase, it will continuously calculate the charge level as it depletes. When the full CDC cycle completes, the unit will display "Done" with both mAh & mWh for lithium batteries, and just mAh for NiMh batteries. Understandably, this process can take several hours depending on the actual charge capacity of the batteries; the higher the capacity, the longer it will take. The nice thing is that you can charge any number of batteries, up to 4 total, and each battery can be a different size and type (eg. AAA NiMh with AA Li-Ion and AA LiFePO4). Size is a bit larger than I expected (6.77"L x 5.11"W x 1.63"H), but with the robust displays for each battery and number of batteries it can simultaneously handle, it makes sense. Below are reviews to the Li-Ion rechargeable batteries that I've tested, none that charge close to their advertised capacities: My XTAR Lithium (Li-Ion) AA Battery Review: https://www.amazon.com/gp/customer-reviews/RSUM0LDFT2FPX My SincehHoly Lithium (Li-Ion) AA Battery Review: https://www.amazon.com/gp/customer-reviews/R390K7RXXBV8VN My Delgeo Lithium (Li-Ion) AA Battery Review: https://www.amazon.com/gp/customer-reviews/R2OPXD8DHSCY37 My RayHom Lithium (Li-Ion) AA Battery Review: https://www.amazon.com/gp/customer-reviews/R2Z9KF179P01ZH

### ⭐⭐⭐⭐⭐ Yes it charges AA at 500mA! Excellent charger.
*by K***T on January 16, 2026*

I almost passed on this after reading a review saying it charged at a much slower rate. That person didn't take the time to look what was going on, it does. The charger takes between 9 and 10 minutes to analyze the battery at 150mA charge rate, then kicks up to full charge rate. It is only AA batteries that it does this with. Likely a safety feature looking for problematic batteries I would imagine. I mainly bought this for mobile charging when I'm away from home and I only want to carry one charger. Working great on AA batteries and 18650 Li-ion batteries as well.

## Frequently Bought Together

- XTAR VX4 Visible Mixer 1.5V/3.6V/3.7V Li-Ion 3.2V LiFePO4 1.2V Ni-MH Batteries Charger and Battery Capacity Tester
- XTAR 4150mWh (2500mAh) 1.5V AA Rechargeable aa Batteries: Longevity Safety Efficiency (8pcs 1.5V AA 4150mWh)
- XTAR AAA Lithium Rechargeable Battery Triple AAA Batteries Rechargeable 1.5V AAA 1620mWh (8pcs 1620mWh 1.5V AAA)

---

## 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.com.ar/products/644468718-vx4-visible-mixer-1-5v-3-6v-3-7v-li](https://www.desertcart.com.ar/products/644468718-vx4-visible-mixer-1-5v-3-6v-3-7v-li)

---

*Product available on Desertcart Argentina*
*Store origin: AR*
*Last updated: 2026-01-28*