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).
Oopies - I didn’t knew 14500 LiFePO4’s were available on FastTech! :o
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.
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.
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.
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.
thanks for this review, i own them but don’t have a proper tester
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!