Test/review of LiitoKala INR26650-50A 5000mAh (Black)

LiitoKala INR26650-50A 5000mAh (Black)

Official specifications:

  • Nominal Capacity: 5000mah(4900-5000mah)

  • Nominal Voltage: 3.7V

  • Weight: 95g±1g

  • Rechargeable Battery: Yes

  • Rechargeable Times: Up to 500 times

  • internal resistance: <20mOhm

  • Limited Charge Voltage: 4.2v

  • Working Voltage: 2.75-4.2V

  • Size: 65.5mm x 26.5mm (Diameter)

  • Place of Origin: China HongKong

LiitoKala has updated the wrapper for their battery, is the battery inside still the same?

Performance looks good up to 15A-20A

The cell got very hot at 30A, this is too much for continuous discharge.


The performance is slightly below the old version, but it is still a very good performance.

Notes and links

Old LiitoKala INR26650-50A 5000mAh (Cyan)

How is the test done and how to read the charts
How is a protected LiIon battery constructed
More about button top and flat top batteries
Compare to 18650 and other batteries

Thanks for the test! That sounds fine :slight_smile:

I’m glad that I bought a few. In my Opus all 4 tested between 5400 and 5500 mAh (so at 500mA discharge), but the Opus measures high.

10x for that review m8, GJ!

When I got my first black sample I charged it to 4.2, did a discharge to 2.8, and then charged it to 4.2 on the Xtar VC2. I got 5500 mAh. Go figure.

Smells like trimmed corners.

Cheers ^:)

Approximately 1.5 months before I could order them from the liitokala official store at AliExpress. Now, they do not ship into many European countries (including mine). Does somebody know, what happened?

It usually has something to do with airfreight regulations. Happened with Gearbest as well.

It is a constant battle between the shops and shipping companies and regulations. It can include a lot of “silly” factors, like not specifying that the parcel contains batteries or putting batteries in cheap flashlights. I believe that all the Chinese shops has this battle where they try to ship batteries and due to changing regulation/polices it gets rejected.

One of the more silly is shipping with “Post Sweden” to Denmark or Sweden. “Post Sweden” is part of “Post Nordic”* that deliver post in both Sweden and Denmark, but they will not ship LiIon batteries to Sweden, only to Denmark (The shipping route is through Sweden) at the current time.

*That company is a political problem (The companies is government owned), “Post Sweden” bought (More or less) “Post Denmark”, transferred a lot of money from “Post Denmark” (There is no reason to own buildings) to Sweden and now “Post Denmark” is out of money (Big time).

I'm searching cells for the Convoy L6, and would like something with similar performance than this LiitoKoala INR, but ideally protected. I know INR chemistry is safer than ICR by nature, but I would get the double security combo, as I'm planning to offer this light. Which cells would be a good choice?

I’m pretty sure that high drain + protected is not possible, unfortunately, it’s one or the other. Others will be able to go into more detail but I’m quite sure the protection boards prevent cells from being ‘high drain’ cells.

if you do want some good protected cells tho keeppower make good ones.


fneuf, cell model numbers are not chemistry recipes and neither normalized ratings. The actual chemistry of most modern quality cells I believe is likely either Lithium Nickel Cobalt Aluminum Oxide (“NCA”, LiNiCoAlO2) or Lithium Nickel Manganese Cobalt Oxide (“NMC”, LiNixMnyCozO2). Source: Lithium-ion battery @ Wikipedia, the free encyclopedia

Protected batteries usually are not high drain types mostly because protective circuitry with enough MOSFETs to handle all of the current simply doesn't fits in the limited available space of a tiny board.

Protection boards add in series resistance to cells, this lowers energy output (voltage and capacity). A typical DW01A plus dual 8205A MOSFET protection board probably adds ≈15mΩ of burden resistance. They also consume power to feed the protection circuitry, something which eventually ends up discharging the cells and self-tripping the over-discharge protection.

Li-ion technology wasn't mean for careless and uninformed end users. Proper user education is always the best approach.


Thanks for this thorough and well wrote piece of information. You are right.

That said I never planned to offer it without educating the "gifted". But I sure also would like to minimize any risks. It's kind of doubling the security measures, too much is never too much. I'm trying to find the hazardless setup to fuel this L6 light. If I rephrase, my need would be "What is the safest way to store 6 to 8.4v in a 2x26650 space?". And at that point, without any magical AAAs to 26650 adapters appearing somewhere (with also really strong hopes that sag would not kill them), the safest energy option seem to be KP 5200 protected cells.

There are quite a few 15A “high drain” protected batteries around now, based on 30Q and VTC6. It just requires more MOSFETs in the protection circuit.

Now they are shipped again with NL post.

Lowest price I've ever seen for these (blue wraps): https://www.aliexpress.com/item/Liitokala-2PCS-26650-rechargeable-battery-26650A-lithium-battery-3-7V-5100mA-26650-50A-blue-Suitable-for/1000004139007.html

Only a few hours left, but sellers re-launch their sales quite often.

There's, however, wide variance in measured cell capacity even among users of the same charger:

:facepalm: and LoL! :-D with the Opus.

No comments…

There must be something wrong with that machine, I believe.

High numbers again…

Looks normal, though user may improve his information technology equipment usage skills.

Consistent with the above Opus' figures.

Interesting, indeed. Do you believe product quality is consistent but not so with regards to user and charger teams?

Cheers ^:)

Well, were the batteries all discharged to the exact same amount?

Are they the same 2 cells in every test?

Those are cell buyer's submitted pictures. 1st, 2nd, last and each remaining pairs from different users.

Albeit there's quite a discrepancy among the Lii-500 units.

Cheers :-)

P.S.: please don't quote like that. :facepalm:


Lowest price I’ve ever seen for these (blue wraps): https://www.aliexpress.com/item/Liitokala-2PCS-26650-rechargeable-battery-26650A-lithium-battery-3-7V-5100mA-26650-50A-blue-Suitable-for/1000004139007.html

7.7 usd for 2 is quite good……64 usd shipping cost to TH :FACEPALM:

A bit cheaper for me.
$56 shipping to Australia