Review request for HKJ [Rechargeable Batteries]

If they aren’t already in the test queue, would you please test the Liitokala 21700 4000mAh 5C discharge

from Aliexpress store 133859 (Edit: Reality is bent*. I have no idea what is real anymore)

https://www.aliexpress.com/item/Liitokala-21700-li-lon-battery-4000-mAh-3-7V-15A-discharge-rate-power-5C-ternary-car/32848013569.html

You can get them at the 11/11 sale price.

*bent

sharply curved or having an angle.
“a piece of bent wire”
synonyms: twisted, crooked, warped, contorted, deformed, misshapen, out of shape, irregular
2.
INFORMAL•BRITISH
dishonest; corrupt.

As real as any other AliExpress seller.

Lishen LS21700SA OEM cell, true 3C rating. Already reviewed in their yellow Lii-40A wrap.

Cheers ^:)

I agree. It is hopeless. There are too many Liitokala stores and websites to know what is what. I edited my post.

Liitokala’s website at http://www.liitokala.com.cn links store 217753. < sigh >

217753 has the yellow 21700s and the black and gold 26650s.

Store No.217753
shenzhen, Guangdong, China

http://www.liitokala.com.cn/Contact.asp

LiitoKala Power Co.,LTD(DongGuan battery factory)
Add: No.38 Changsheng Road, Tiantangwei, Fenggang Town, Dongguan City, Guangdong,523690,China
website: www.liitokala.com.cn
Contact: ZhangNi
TEL: +86 13760394452
Email and Skype : liitokala@126.com
Office hours: (HK Time) Mon - Sat: 9:00am - 22:00pm

The “other” LiitoKala website at http://liito-kala.com/ links store 133859 < big sigh >

This one has the pink 21700s that might also show up in red or blue. They also sell the blue 26650s

Add: 6th Floor,Ling wu industral Road 8 D,Shenzhen Guanlan Junzhibu,Guangdong province,518110,China
Tel: +86-13417331508

Email:emily@liito-kala.com
Office hours: (HK Time) Mon - Fri : 9:00am - 6:00pm

Purchase link:
https://liitokala.aliexpress.com

Just found this fairly priced sale for Panasonic NCR18650BM cells: https://www.192led.com/product/2pcs-3-7v-3200mah-10a-18650-li-ion-rechargeable-battery/

Couldn't find any meaningful review besides this video:

SKV89 mentioned this cell back in January.

Maybe a high quality cell for small electric vehicles.

Cheers :-)

The cells that you propose have the same specifications as this model: Panasonic NCR18650BD 3180mAh - 10A - 18650 - Li-ion - Rechargeable batteries | NKON

What are the differences between these two cell models (both from Panasonic)?

¯\_(ツ)_/¯

There's the “BD” and the “BE”, and now this “BM”. All I can say is the capacity figures that guy in the video gets, even if at 0.25A discharge rate, are rather beefy.

I miss some formal Panasonic cell reviews.

Cheers

You forget the BF and BL too, lol, it’s really unclear their name, it seems to me that the BE and BL are 7-amp cells, the BF meanwhile gives 4.9 amps it seems to me?

My informations about Panasonic cells:

BE - 1. generation of Tesla Model S 85 cells with carbon anode (unconfirmed)
BM - 2. generation of Tesla Model S 85 cells with C-SiO anode (parameters confirmed by direct comparison with Tesla 85 cells (MY2016) and many cycle life tests in my lab)
BD - is BE or BM technlogy based cell without bottom vent (unconfirmed)

BF and BL cells are based on other technology, I think BF and BL both are C-SiO anode succesors produced by Sanyo of an old Panasonic NCR18650B. (unconfirmed)

Do you have information about NCR18650PD, NCR18650PE and NCR18650PF?

Only a guess that it is the evolution/modification of the same 2900mAh technology. I have personal experiences only with PF cell which is an old fashion Panasonic low DCIR cell with great cycle life. (PF has lower DCIR than BM and slightly better cycle life, but it is also slightly more expensive USD/kWh). PD seems to me as PF with bottom vent. I heard about PE for the first time from you.

Here you can find more info and comparsion sheet between PD and PF from Panasonic Panasonic PF NCR18650PF: 2900mAh, 10A – 18650 Battery | BATTERY BRO

Found a source of genuinely wrapped chinese (?) OEM 26650 cells:

26650 - OTHER section @ Lucky Electronics Store AliExpress

Cheers ^:)

This should be better than any 9V battery that you tested. I see no seller, but maybe you could get a sample pair?

The specifications do not look very good. I do not like 3.7V nominal, 4.2V charge voltage and 2.75V cut-off for 9V batteries, they are specifications for a single cell.

Hmm…3.7V? I missed that. Indeed that doesn’t look good.

For clarification purposes, Henrik's latest LiFePO4 cell review -Enerpower 18650 3.2V 1800mAh (Blue)- confirmed a well seated suspicion I had with regards to the brand-name OEM behind the 3x wide leg tops: Heter Battery.

Cheers ^:)

Eeerm… LiFePO4 batteries' state of charge versus charging voltage

Cheers

Hello!

Just curious but, was the Heter/Enerpower 18650 1100mAh 33A LiFePO4 review planned? Along with the already reviewed 18650 1800mAh 3C it was suggested by me here (#582), just wondering.

Cheers

Yes, it is testing at the current time.

Thanks Henrik. I believe there is some market for small LiFePO4 cranking batteries. However, I wonder how much actual lifespan can be expected from a LiFePO4 battery in this regard. I mean, without some sort of adjustment modification to the vehicle (motorbike) voltage regulator.

Recently a friend of mine visited me with an old store bought small bike LiFePO4 battery. We carefully dissected the box with my rotary tool and found a set of 4x prismatic cells inside, they weren't looking very good and some were leaking a bit. A balance board was also inside, but after testing with my power supply unit I found none of the balance stages would activate with less than 3.7+V. In my opinion this is a joke because at that point the battery is more than probably receiving substantial damage. Yes, I am battery care picky.

I kept the box just in case I decide to custom build some battery.

Cheers :-)

The testing finished today and I have published the review.