Here’s my most recent XTAR item – a 4 bay charger powered by USB-C.  It’s a very simple charger, so this probably won’t be a very long review.  Read on!

Official Specs and Features

Here’s a link to the official product page.


This one goes for $13.99 on amazon (referral link).

Short Review

It’s a good enough simple charger.  There aren’t many bells and whistles but for general chargin, it’s fine.

Long Review

Key Features

  • Type-C input, Ni-MH battery compatible
  • New upgrade, more compatible
  • Independent 4-slot, support mixed charging
  • Type-C powered, dual-way in/output
  • 0△V and -△V smart charge, prolong battery life
  • Seven protection functions to ensure safe use
  • Current adaptive, higher charging efficiency

Manual and Packaging

What’s Included

  • XTAR MC4S 4-bay charger
  • Charge cable (USB to USB-C)
  • Manual

Build Quality and Durability

Like I said, this is a simple charger, and the design and build quality are “simple” too.

Each bay is labeled with the charge rate, as seen below.

Each bay has its own indicating LED, which can be red or green.

These posts for the negative connection aren’t all that straight, but could be touched up easily.

The back has some cooling ports.

And a sticker with all the supported sizes and chemistries.


Size is 100mm x 97mm x 26.5mm.  It’s a small charger!


Power to the device comes through the USB-C port.  Others have said that this isn’t a proper PD port and that may be.  I did try USB-C to USB-C and the charger worked fine.

The provided cord is USB to USB-C though.

Various size cells fit in here, with the largest diameter being the 26650 cell, and the longest being the 21700 cell.

The charger also works with NiMH and NiCD, as well as of course the LiIon cells seen above.

I did 4 tests in a way a bit different from normal.  I just tested the power going into the charger – so these results won’t be a “per bay” charge rate.  Also it’ll be the current at the input Voltage of 5.2ishV, so actual current to the cell should be a little higher than simply what you see here.  But just so you have an idea what charge rates you’ll see…. here are the graphs.

When charging (or “activity) is happening on any bay, that bay’s LED is red.  Once charging (or “the activity”) is complete, the bay’s LED switches to green.

Interestingly the standby current of those four emitters (which are green if the bay isn’t in use) seems to me to be quite high.  (It can be seen in the graphs above, toward the end on the last graph.)

User Interface and Operation

There isn’t one.  Nothing to press, nothing to do.  Anything you get this charger to do, it does automatically.  That’s charging the various chemistries, and activating zero voltage cells.  Charge speeds too – the outer two bays can do 0.5 or 1A, but it’ll be selected automatically.


What I like

  • If what you need is a charger then this is a good low cost option.
  • Inexpensive
  • Supports multiple chemistries
  • Very small for a 4-bay
  • Does seem to work from PD power

What I don’t like

  • No rate lower than 0.5A


  • This item was provided by XTAR for review.  I was not paid to write this review.
  • This content originally appeared at  Please visit there for the best experience!
  • Whether or not I have a coupon for this charger, I do have a bunch of coupons!!  Have a look at my spreadsheet for BangGood and GearBest coupons. Please subscribe and get notifications when the sheet is edited!!

1 thought on “XTAR MC4S Charger Review”

  1. I bought and returned it last year. It doesn’t support PD. Some PD adapters provide more current for the dumb sinks, but they should NOT.

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