SkyWolfEye 14500 li-ion battery – Way too many nouns!

SkyWolfEye Li-Ion battery review.

Straight from China is a new 14500 series Li-Ion battery from a company known as SkyWolfEye or as I affectionately put it “The battery with too many nouns.” When you google just SkyWolfEye you end up finding a lot of flashlight reviews and not all of them bad. So a battery with the same name can’t be all that terrible right? Let’s find out!

I got these batteries from a friend which paid for these things on eBay at around $12 bucks shipping and handling for a pack of 10 1200mAh SkyWolfEye batteries. Now, 1200mAh throws some red flags for me right away because the lipo/li-ion 14500 cel batteries typically run around 700-800mAh with very few exceptions like some Sanyo batteries pushing the upper limits of around 860mAh. He noticed how his flashlights were dying after only being on for about a half an hour and wanted me to check these out and see if it was either his flashlight or the batteries themselves.

How the SkyWolfEye batteries were shipped.

USPS First Class potential lithium bomb.

Wow, ladies and gentlemen. We give you the reason why fires happen on shipping vehicles/boats/planes and why a lot of carriers get super-pissed if you don’t mark your boxes containing lithium material. This is how the package was sent from California all the way to Wisconsin via first-class postage because it’s the cheapest way to ship things under 13 ounces or 368 grams. nothing protecting the batteries except for a bubble mailer. and to really add insult to injury, the batteries were loose inside of the bag causing potential shorts and bridges during its travels across the united states.

The blame game.

Is the buyer to blame for this happening? No, this comes down to the seller trying to aggressively mark their product as low as possible and having a reckless abandonment about quality control or even safety.

Alright. So I pulled all of the batteries out, hooked them to my multi-meter and they are all reading around 3.9vdc. Now to most people who do not have any way of testing the total amperage of a battery they could consider this a good product and happily move along with their lives.

Testing the SkyWolfEye 1200mAh li-ion batteries.

We don’t believe in moving on with a simple multi-meter test. So let’s break out some hardware.


My test station is an IMAX B6v2 station that we have some jumper cables attached to wire and neodymium magnets to hold the wires onto the SkyWolfEye battery terminals as we are charging. I have tried this simulation in both Li-Ion mode and the more safer Li-Po mode as the only difference when charging is Li-Po voltage cut-off is around 3.0vdc

Drain and recharge Li-ion batteries.

The first thing we want to do to get a good clean charge is dropped the lithium cels to their minimum voltage as when you receive lithium batteries they have what is known as a ‘storage charge’ to them. It’s basically the battery charged at around %70 to keep the chemicals inside of the cell stable during long-term storage such as packaging, and shipping. I also have my Wi-Fi module hooked up to pull results with my android tablet if necessary.

With a 1amp discharge, the battery drained in under 20 minutes only storing 234mAh with the li-ion battery dropped to 2.9vdc. Huh, okay. So let’s charge it up.


After just 52 minutes with the charge set for li-ion – 1A charge, the batteries finished as an abysmal 426mAh. This is some classic low-grade Chinese batteries. Now I didn’t stop with just one cell, I went through all 10 li-ion cells, and they all had varying degrees of failure of the worst being at only 230mAh and the best one shown above at 400-450mAh. Discharging held roughly the same values as charging.

Incoming E-Bay drama lama action.

Upon showing my friend the results he contacted the buyer and this is what they told him:

hi friend,sorry to hear that.the supplier told us that it will get 1200mah after full charger. could you full charge the battery to check it again?Dont worry,we will help you.Thanks

– VV, Ebay Seller.

Okay, so what’s going on is their ‘supplier’ based out of China is telling the seller based out of California that their shit is good. The seller makes no attempt to test their own product out just simply takes the money and dangerously ships these batteries across the country because suddenly shipping things within the states get expensive. They attempt to set up shops in America and other countries around the world to win the buyer’s trust.

My friend got his money back and sent the batteries back. Probably to be re-sold on eBay to someone who does not have an advanced lithium charger.

Most of these sellers use diversion tactics in order to keep their money.

Update: 07/10/16 – Our buyer friend reported to us that the seller attempted to send the buyers eBay item to the wrong address. Then,ย  contest it by saying that the buyer was the one sending it to the wrong address instead of the seller updating their address in the eBay system. It is also noted that the seller attempted to hide the auction to avoid getting any negative reviews or further contact information directly from the eBay Buyer panel. I showed my friend how to get to the open ticket for this item to pursue him as well as how to open that auction up.

A negative feedback was left upon the seller’s account due to their evasive tactics and blaming the buyer for the faults of their own shady business model. They knew they were selling garbage they are simply not expecting anyone to call them out on their garbage.

Buying within your country versus out of country.

The only nice thing about the fact that these vendors are moving to the country with the buyers is that you buy from a seller within the said country is generally there is a money-back guarantee for new products and if they fail to comply you can file fraud against them. Unlike doing business overseas like say, India, where if the seller wanted he could just take your money, send you a package filled with flour and tell you that you’re screwed as you have jurisdiction over there.

The Final thoughts.

18650 fraud batteriesmAh is meaningless in the Chinese market. Minus well say 500,000mAh!

Lithium-Ion batteries have a typical mAh rating depending on their size classification. For example, the 16850 size of lithium battery has a typical charge of around 2100mAh so while it’s possible to see up to 2500mAh if the lithium cells are Japanese made that would probably be limited. There’s even guides on Ebay showing how many fraudulent batteries there are floating around out there. and the pictures that I have for 16850 batteries? those are all pulled from Amazon and all of them are fakes and frauds that do not have anywhere near the total output the claim to have. Without certification and control, you lead to chaos which is what’s going on in the Chinese market.

You’re always going to see some variance in your charger as the chemicals inside of the batteries are changing on each charge. however. variance between its rating and reality shouldn’t exceed more than %20 otherwise it’s used/bad.

The same rules apply to 14500 batteries. Typical mAh is around 700-800 mAh although there is an occasional few that can exceed that and go up to 850mAh. For top-quality batteries you will be paying a top quality price for them.

So in summary:

  • If the price is ridiculous (i.e. 1-2 bucks a battery.)
  • If the mAh is ridiculous (stating that it contains 3-4 times the power or any conventional battery.)
  • If it’s a brand you never-ever heard of before.

Then chances are the batteries are fraudulent crap.

Good Li-Ion 14500 batteries.

Trustfire - 900mAh 14500 BatteryThe batteries that I would recommend within the 14500 model are true Sanyo UR14500P. If you are looking for a flat-top style battery for your project. Or if you’re looking for something a little more like a AA battery and of course something less pricey then $6 a battery. Then the Trustfire 900mAh batteries should do the trick. Trustfire’s are not true 900mAh. But hooking them up to my charger we got 780-820mAh which is good enough for me! Trustfire also explains how they were able to accomplish getting 900mAh out of their battery by effectively bypassing their under-volt protection and draining it down to 2.0 volts DC which lithium-ion suicide.

Because Trustfire has a good name behind them. Always check the hologram sticker on the side of the batteries, and if possible test the amperage of your battery. China vendors are trying to screw up the trust fire name with bad batteries there too.

Also, be sure and check out my original lithium charging fun post about the rules of these batteries so you don’t have a fire on your hands!

Special notes about China in general.

Look, I know it sounds like I’m coming across like I am disrespecting china. I’ve bought a lot of things both very expensive and very cheap from China.ย  I believe what is happening is that they have grown exponentially fast and as a result, a lot of lawlessness and ethical issues rise up in any form of commerce. I don’t think that SkyWolfEye and other production facilities that use lithium are hurting their own country by being dishonest with the value and quality of the batteries. This is pandering to the lowest common denominator which is the buyers that think they’re getting a great deal until it’s actually put to the test and fails miserably. Most of these companies are in it for the quick buck and disappear without a trace.

I’m not one for crazy government control, but a little quality control within the market will go a long way. And perhaps that level of authorization needs to happen even if it means paying a little more per battery. At least the laws of the net will always remain. which follows:

You are crap until proven otherwise.

– Anonymous

Unfortunately, these batteries failed to prove otherwise.

Got a battery that you have had success with? leave in the comments below.


12 thoughts on “SkyWolfEye 14500 li-ion battery – Way too many nouns!

  1. I’m so glad I found this page ๐Ÿ™‚
    Back in mid 2018 I bought 4 pairs of these batteries from eBay as the price was so good (this should have raised a warning flag).
    However I’ve only been getting about 20 minutes runtime out of them and they would “fully” charge in about the same time!
    After a few tests I worked out they were roughly only charging to about 280mAh at best.
    I suspected my charger wasn’t working properly and contemplated replacing it, but after reading your findings (that pretty matched mine) I’m 100% sure they’re just cheap nasty batteries.
    Lesson learned… I wonโ€™t be making the same mistake again!
    Thank you ๐Ÿ™‚

  2. I’ve purchased some lithium rechargeable batteries recently, to use in some nanny cams. They seem to work well but are not a known brand to me. They’re Zeasun brand, size CR123a 16340, 3.7V 700 mAH. I purchased them on Amazon with seemingly good reviews. Any thoughts on reliability of these no-name bats?

    • Zeasun seems to behave a lot like Trustfires. Their claims are a LITTLE inflated and we bet that if you hooked them to a professional charger they would probably rate around 600-650Mah versus the advertised 800Mah But that margin of error is acceptable versus SkyWolfEyes 1800Mah which is a immediate red flag fraud battery.

  3. Yep. I tested the same batteries and I got the same results. I didn’t bother discharging it first and the full charge capacity was a bit over 400 ma-h. I checked them both for self discharge by leaving it in an envelope for almost a year, and the SkyWolfEye has just over half the self discharge. This suggests it will last about as long in super low current applications.

  4. Hello S-config,
    I purchased these same batteries, and from what I can see from your photos of the packaging, there’s a very good chance I got mine from the same exact seller out of Ontario, CA. Reason for buying them? Your guess is as good as mine. I’m just a homebrew electronics junkie/CAD designer/project enthusiast with too many 18650’s. Maybe I was going build a high powered flashlight, maybe I was going to use them for Arduino projects? I don’t know.

    The good news is, I got mine for free, and after reading this blog post I have no intentions on doing the right thing and sending the seller the money. What happened is the package got lost in the mail. After 5-6 days being late, I contacted the seller and asked for them to make a claim with USPS and send me a new package. They gave me the run around for 2-3 days and then I put my foot down with them, and they promptly sent me a refund via paypal. 16 days later the package mysteriously showed up and I decided to see if I could find any bench tests.

    I thought it was odd that the first 4 batteries I charged on my l-ion charger, went from zero to full in about 30 mins. I’m aware of the factory 70% charge held in most new batteries but these were completely drained. I suppose I should have done my research BEFORE buying them but it was just an impulse buy to be honest.

    There is one good thing to come about purchasing these batteries, and that’s finding your site, which I just bookmarked in my browser. Thanks for running these tests! I might use them in a transceiver, or a very low power arduino project, but nothing more than that.

    PS- One difference with my batteries is they were all individually shrink wrapped in clear plastic. But everything else was identical to your photos, right down to the packaging and origin. -Madyn3D CNC

    • Well the awesome news is even thought you purchased them at least you didn’t have to pay. Good to hear that they at least spent the time to shrink wrap them so the contacts do not connect! To be honest if I had the resources I would love to buy these types of batteries and run tests on them just so that there is a do/do-not buy list people could use. I fear even if I do that there would literally be bootlegs OF the bootlegs! (The trust-fire 14550 series have a problem with this)

      I hope to soon be diving into arduino projects myself (joystick controls) but thanks for checking out my blog! Best of luck on your DIY adventures too!

  5. I bought eBay batteries that are a pale green. they charge up and are dead on charge 2 days later, cannot run a toothbrush on them no matter what charger is used. 1200mAh has so low a output that a single LED flashlight with 2 batteries would not work more than a hour.

    • Any markings on your batteries? Even if your LED flashlight is a high powered one like a CREE or Luxeon. It sounds like you got shorted on your mAh storage as well. File a claim with Ebay to get your money back.

  6. Hi, thanks for that, was looking at this brand on “FleaBay”. Wont bother with them now. But I do have to point something out… Lithium batteries need up to 5 charge/discharge cycles initially to reach their peak performance. This really does make a massive difference. But probably not with this rubbish!

    • True about the charge/discharge cycles. Sorry about not mentioning that. We did try do cycle these batteries about three times and if there was an improvement in storage even something minor like 50Mah we probably would have kept going with the test. But the storage current did not change on eight of the cels we got. Two of them they actually dropped by 20Mah which I consider the reading anomalous and no real improvement. Settings used on our lithium charger was 1amp discharge with the cut-off at 3.0 volts and 500Mah charge rate since going 1/2 of C maximum is the recommended charge rate. Since I no longer cared about these I even dropped the discharge rate down to the minimum 2.8 volts and did not seem to change.

      In other batteries of the 14500 series the Trustfires were at 760-780Mah and sort of stayed there. and the Sanyos started at 800Mah but now getting around 820-860Mah per recharge.

      Thanks for checking out my blog! Good luck on the battery search!

  7. Hey, it’s all true test in which it is written.
    ” please file a complaint on quality !”
    My money from China are already at home in Slovak rep. Refund arrive 2. day.


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