Test/Review of Windyfire IMR26650 3500mAh (Blue)

Windyfire IMR26650 3500mAh (Blue)



Official specifications:

  • Nominal capacity: 3500mAh
  • Nominal voltage: 3.7V
  • Discharge cut-off voltage: 2.75V
  • Standard charge: 4.2V 1000mA
  • Maximum charge current: 3500mA
  • Continuous discharge current: 30A
  • Pulse discharge current: 60A
  • Initial impedance max.: 18mOhm
  • Cycle life: 500cycle to 60%
  • Operating temperature: Charging, 0°C ~ 45°C, Discharging, -20°C~60°C
  • Storage temperature: -20°c -35°c
  • Weight: 90g




This is a high current 26650 cell, the two ratings printed on the cell is continuos and pulse rating.










The discharge curves is tracking nicely and capacity is nearly constant up to 20A and do also match the marked capacity. The 30A curve is a bit high for the battery.















Conclusion

This battery has good high current performance, this also means it is not a top performer in capacity.



Notes and links

The batteries was supplied by Windyfire for review.

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
Compare to 26650 and other batteries

Seems windyfire it’s a “fire” brand with little to nothing to share with other “xxxfire” brands

Their imr i’ve tested till Now are very good, with a nice price/performance ratio

What do you think HkJ?

They do have some good batteries. I wonder if all the batteries I got from them are just as good.

I would like to try some of the good ones for obvious reasons suchas price. But, I have been afraid to order them and have stuck with Efest, Keeppower and Olight. I use 18650’s, 18350’s and would like some 16340’s.

Advice please?

Thanks Matt

I just realized these are LIFePo4 chemistry. I guess you can’t get a safer cell than that. Very nice and thanks for the review.

No. They are probably IMR chemistry, i.e. LiMn.

Hi HKJ,

I got this directly from the WindyFire website. Assuming you are correct, it’s amazing the manufacturer mis-labled their own product.

Brand /model
Windyfire
Tpye of Battery
LIFePo4 26650/3500mAh

They must have mislabelled it. It is definitely not LiFePo4.

Earth Windyfire - one of my favourite bands of all time.

If we thought there wouldn’t be yet another xxxfire, out comes Windyfire! Surely people can come up with unique names.

Having said that the performance comes up well in your review. Thanks again HKJ for the review.

Thanks for the review. I have two of their 14500s coming.

Thanks HKJ and Richie

yes our Web site personnel have mistake ,the windyfire 26650 3500mAh is not LIFePo4 battery ,it is Li-Mn battery ,the voltage is 3.7v(LIFePo4 Voltage is 3.3V) .

Thank you for correcting and reviews,

thanks HKJ hard work .

sorry ,Richie ,you are right ,our company have mistake ,we will revise it as Li-Mn battery.

Thank you for verifying that and correcting the Web page, and nice to have you here on BLF Linda.

Hi ,Friend ,I am happy to talk with you here .

thanks your message ,If you have any question about the windyfire battery ,please leave message on the forum .i will reply you ASAP.

Thanks for the review HKJ.

You will like them. I bought 2 from Mt. Elec. for my Modded Minicree[Sipik]. They provide plenty of output[~700 lumens/80Kcd] and decent run time. :wink:

Hi wolfdog1226 ,nice to meet you here.
may i ask you one question ,Based on my experience,the minicree flashlight Conventional drive current is generally 0.5A,windyfire 14500 battery the discharge is 10A,the li-ion 14500 Usually have 2-4A discharge ,so the IMR 14500 and the li-ion 14500 all can Can meet the driving current ,In theory is the same output, I do not know how is the Real world ,
wolfdog1226 ,do you have some experience.

Thanks for the great review!

Where can I get these?

For a stock light you’d be correct but some of us have modified lights that run on a 14500 and pull over 5 amps.

Thanks friend ,i know.Thank you for sharing your experience.If the MINI CREEE Flashlight need 5AMPS,The flashlight Whether it will be hot ?