LiitoKala 26650-50A 5000mah 26650 - great first impressions

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Mitko
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LiitoKala 26650-50A 5000mah 26650 - great first impressions

I`ve spotted that battery recently on Ali, and since it was only 6$ /pc by that time i bought some for evaluation, for my surprice they camein a week or something( declared as kitchen goods)

Well i have to say i am greatly impressed by this one: its actualy the first battery that beats my favourite Efest Purple 4200 26650, both that i got perform the same, Li500 charger says they have lesser int resistance than a brand new Efest( if one could trust Li500 ofc, Opus 2.2 says the same btw)

I`ve tested it at 5amp consumption( in an l2 host/fet dd U4 based flashlight) again Efest 4200, after 15 minutes with the Liitokala runing cds dropped to 231, and right of the flashlight top current was 4.24 / 3.88 voltage With Efest Purple 4200 after 15min cds were 222, current 4.12 and the voltage 3.82

With both batteries charged to 4.20 Liitokala again beats Efest with 0.05amps: 5.07 agains 5.12

Atm i am testing its capacity

Ofc its a lame method and it needs to be tested like it should, yet its the only 26650 battery that could do this agains Efest Purple 4200

I dont know if those 2 are a lucky pick, and i dont know if all of those are(will be) of the same quality

Edited by: Mitko on 05/19/2016 - 16:20
L4M4
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Sooooo…
what are you going to do with it in your kitchen?

Sounds promising!

jescereal
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The price went up to 9.20 a piece. Crying

Looking forward to the capacity!

Mitko
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Well there are offers for 6$+ but we do need definately more feedback from other BLFers

P.S
Taken for a user feedback…..

Mine are still discharging though

Barkuti
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Interesting!

0K, let's see if I've understood what you said correctly:

  • Right out of the charger, you measured 5'12A off the LiitoKala?
  • After a 15 minute run, your last measurement was 4'24A/3'88Vload

I wonder if this battery would be a good choice for good runtime on a near 5A load while still keeping Vload above 3'6V. My guess is that, probably, those Basen 4500mAh ones would fare better, yet can't say for sure at this moment.

 

Cheers Party

P.S.: is that a discharge test? Smile

Copper is mine, copper divine!

«You may be taught and think for shame to be good but, in fact, a wise master said to me you wouldn't enter the heavens alive before going through your last bit of it.»

         

L4M4
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Barkuti wrote:
After a 15 minute run, your last measurement was 4’24A/3’88Vload?

My guess:
A flashlight with a FET driver – and after 15Mins, the Current and the cell voltage was higher than the other cell after the same time in the same flashlight.

jhalb
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Just pm'ed HJK.

Looks really promising!!surprised

Barkuti
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What about the internal resistance? From what you said Mitko, I estimate it to be… 30-33mΩ?

 

Cheers Party

Copper is mine, copper divine!

«You may be taught and think for shame to be good but, in fact, a wise master said to me you wouldn't enter the heavens alive before going through your last bit of it.»

         

akhyar
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Very promising indeed Mitko.
Ordered one from GB instead as they still have them for less than 6 bucks a pop
cheers

FlashPilot
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Thanks for the report Mitko. Especially your mentioning that the cells are closely matched. This indicates a higher level of manufacturing tolerances that we almost never find in Chinese manufactured cells. I just ordered a 4-pack for my serial powered lights. If they produce the same results, and the prices dont go up, I’ll buy many more.

Cheers!

Mitko
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At 1 amp discharge with Opus 2.2 : 5588 and 5562 ma

FlashPilot
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Thanks! I hope they remain balanced at 4 and 5A

Mitko
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Indeed! And most of all: all of them, not only this batch or the next Smile Thats the main problem wiht those batteries…anyway we do need more BLF tests about that matter

khas
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Ordered two from GB, let’s hope they are just as good.

http://www.gearbest.com/batteries/pp_360841.html

bella-headlight
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Glad to see you are impressed with the cells Mitko Smile
I ordered a pair at $6 each which according to Aliexpress tracking arrived in the UK on the 16th so hopefully I should get mine very soon.
I will post my results once mine have arrived.

tekwyzrd
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Ordered two from gearbest. It gave me a way to use points that will expire soon that brought the price below $10 including tracking. Unfortunately there is only one shipping option and tracking is mandatory. My order for 8 ncr18650b was the same and shipped nl post and it took 3 weeks to reach the facility in Amsterdam. China to US via Amsterdam? Flat Stare

Barkuti
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tekwyzrd wrote:
Ordered two from gearbest. It gave me a way to use points that will expire soon that brought the price below $10 including tracking. Unfortunately there is only one shipping option and tracking is mandatory. My order for 8 ncr18650b was the same and shipped nl post and it took 3 weeks to reach the facility in Amsterdam. China to US via Amsterdam? :|

 

I also ordered a 4-pack of NCR18650Bs recently, and it came from (very quickly indeed, 9 days) that same facility; it seems they're stocking these on a warehouse located in Amsterdam.

 

Cheers Party

P.S.: the additional shipping fee is because they need to use selected shipping carriers/methods. FastTech does the same with batteries, you have to select either “Sweden Post registered” or “TNT-postNL registered”.

Copper is mine, copper divine!

«You may be taught and think for shame to be good but, in fact, a wise master said to me you wouldn't enter the heavens alive before going through your last bit of it.»

         

JPLight
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Sweden Post did not work ! 4×18650 were sent back to FT and I was refunded.

Barkuti
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My last shipment from FT, a 3-pack of ICR18650-30Bs, arrived home last wednesday with no issues for me; well, no issues albeit maybe the tadly slowboat shipping (a month and a day) compared with a torch I had issued on the same order which took 3 weeks; order shipping was split because of stock issues with the batteries. Both shipments through Sweden Post registered.

 

Cheers Party

Copper is mine, copper divine!

«You may be taught and think for shame to be good but, in fact, a wise master said to me you wouldn't enter the heavens alive before going through your last bit of it.»

         

jack-bkk
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I just ordered 2 too I have 2 keep power coming which are exactly double the price will be interesting to compare them

Barkuti
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Selling like hot cakes! 

In the cart these go!

 

Cheers Party

Copper is mine, copper divine!

«You may be taught and think for shame to be good but, in fact, a wise master said to me you wouldn't enter the heavens alive before going through your last bit of it.»

         

bella-headlight
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Received my first pair this afternoon (I have another pair coming), they both arrived showing 3.79v.
I immediately put them in a Lii-500 charger & charged them at 1A, let them rest for 1 hour then performed a discharge test.
Results,
Cell 1, IR during charge 24, IR during discharge 22, capacity 5096.
Cell 2, IR during charge 19, IR during discharge 20, capacity 5176.
Not quite as good results as Mitko, don“t know if that could be due to different chargers, or slight differences in the cells themselves but both of my cells were pretty uniform & still good results none the less ?
Both cells just exceeded stated capacities after 1 initial charge from new Smile

akhyar
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There have been few posts over here and at CPF that some Opis BT C3100 users found that their chargers overstated the battery capacity when the run discharge test, i.e. the capacity of their batteries (especially 18650) as shown on their Opus can be 100-200 mAh higher than the official rated capacity.
I have never encountered this problem on my Opus, just that this issue are mentioned by some members at both forums

bella-headlight
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I am performing another charge/discharge test just to see if there is any difference in capacity after a second charge & will post the results later today.

bella-headlight
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Second charge/discharge cycle finished.
Cell 1, IR during discharge 23, capacity 5114
Cell 2. IR during discharge 18, capacity 5190
So fractionally better than the first test results but still within a few ma“s & the cells seem pretty well matched Smile

Barkuti
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Nice numbers, indeed.

Now, if those IR values are to be believed, that would mean these cells should handle a continuous 20A discharge rate with ease (within a ≈10W thermal envelope). 

Grreat! 

 

Cheers Party

Copper is mine, copper divine!

«You may be taught and think for shame to be good but, in fact, a wise master said to me you wouldn't enter the heavens alive before going through your last bit of it.»

         

jhalb
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Darn, I only bought one to play with a week ago. Any left? I know GB will say they have them when in fact they don't. Well, against my better judgement I went ahead and ordered 4 more. I don't expect to see them in any less than 60 days, maybe longer.

jhalb
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Mitko wrote:
At 1 amp discharge with Opus 2.2 : 5588 and 5562 ma

What are you discharging them to? 3 volts?

bella-headlight
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I have another pair coming from another supplier so we will see how they test compared to my first 2.
Might show if there is continuity with these cells Wink

bella-headlight
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My other pair of cells from the other supplier have just arrived Smile
Checked the voltage & both showed 3.79v, exactly the same as the first pair Thumbs Up
I have just started a charge cycle & will report back with charge & discharge results when finished Wink

JPLight
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Just received 4 pcs of Liitokala 26650 yesterday. Voltage around 3.82 V.
I will do capacity tests on 2 of them in the next days. Tests will be on 1A, 3A and 5A. 7A test is possible on request.

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