Test / Review: Coolook 10400 LiFePO4 batteries

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Shadowww
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Test / Review: Coolook 10400 LiFePO4 batteries

I got a 4-pack of those from Fasttech, they have arrived few days ago. Here’s a photo of them:

Size: they’re completely equal to my AAA eneloops – both in length and width – so they won’t have trouble fitting anywhere. Now, the interesting part – how do they perform?

Their claimed capacity is 250mAh, sadly I haven’t been able to get more than 200mAh out of mine.

Here are discharge graphs, the most interesting part I guess:


0.1A (0.5C) discharge rate, 198mAh capacity


0.2A (1C) discharge rate, 176mAh capacity


0.4A (2C) discharge rate, 167mAh capacity.


1A (5C) discharge rate, 165mAh capacity.

Please note – if you want to know actual voltage, add 0.1V to 0.4A graph in your head, and 0.2V to 1A graph – that was voltage drop on magnets (which I had to use as I didn’t had a decent AAA holder).

Edited by: sb56637 on 08/26/2014 - 17:45
MRsDNF
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Thanks Shadowww. You dont get much in a small package.

My current and or voltage measurements are only relevent to anything that I measure.

Budget light hobby proudly sponsored by my Mastercard and unknowingly paid for by a hard working wife. 

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Tecmo
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At least they “look cool” Wink

Thanks for the test. They aren’t too bad at 1A

DENGOH
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Thanks for the review. Always wonder how good are those coolook.

cool i'll see you when you get there

sb56637
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Thanks very much for the review! Frontpage’d and Sticky’d.

Budget Light Forum ...where Frugal meets with Flashlight!

That Ninja Guy
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Been wondering about these, thanks for the review Shadowww.

TSellers
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That’s great, I have some but as my Maha wont do a discharge test on them I appreciate the review very much. Are you doing the AA format as well?

Regards, TS

Shadowww
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TSellers wrote:
That’s great, I have some but as my Maha wont do a discharge test on them I appreciate the review very much. Are you doing the AA format as well?

Oopies – I didn’t knew 14500 LiFePO4’s were available on FastTech! Shocked
I’m going to order them right now (from all 3 manufacturers – Coolook, Powerlion and Soshine), and I’ll run some tests on them when they arrive.
TSellers
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Now there are going to be lots of people hoping your order arrives quickly! In fact I think I’ll hold off ordering anymore until you get yours. Thanks for that.

Regards, TS

Shadowww
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It usually takes 2-3 weeks for FastTech orders to arrive to my country, so you’ll need quite some patience Silly

brad
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Fasttech just got these in yesterday, are they better or worse than the flames do you think?
DLG 3.7V 14500 800mAh Lithium Battery
http://www.fasttech.com/products/1/10003877/1276310-dlg-37v-14500-800mah...

If you feel like answering any 14500 questions we had some on this thread. http://budgetlightforum.com/node/19537#comment-350445

TSellers
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Today I tested my Spark SD52 (that is the AA cell model, takes 2 in series) with 2 NiMh 2050mAh LSD cells. On high setting it got about 2:15hrs. The cells could not supply enough power to kick the light into turbo mode. Then tested with 1 LiFePO4 cell and a dummy and got 45min, and high mode was noticeably brighter 15 minutes after turning on compared to the NiMh. Then I tried 2 LiFePO4, and this time I got 1:45. For anyone that has a AA cell light that can handle the higher voltage, LiFePO4 does seem to offer some tangible advantages.

Regards, TS

Shadowww
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Look what I’ve got in the mail today Silly

I’ll publish test of all 3 of them this weekend.

TSellers
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Now I’m looking forward to the weekend, will seem like a long wait!

I think I mentioned it elsewhere, but I got a few of the Soshine 700mAh LiFePO4 and when I compared the run times in a Spark SD52, the Coolook fared better, I’ll have to try again a few times to get a better assessment of what to expect however. The trick is to be around at the exact moment the light shuts down and not miss it happening.

Regards, TS

Shadowww
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TSellers wrote:
Now I’m looking forward to the weekend, will seem like a long wait!
Do you care about 0.1A results?

If not -> http://budgetlightforum.com/node/20415
Silly

islisis
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thanks for this review, i own them but don’t have a proper tester Smile
glad to know they are par for lifepos. being so lightweight you couldn’t expect more :bigsmile:
i use them with xenon bulbs in mag solitaires!