Test/Review of Windyfire IMR26650 3500mAh (Blue)

[size=+3]Windyfire IMR26650 3500mAh (Blue)[/size]



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.















[size=+3]Conclusion[/size]

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



[size=+3]Notes and links[/size]

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

The 10A discharge curves look almost identical between this Windyfire IMR26650 3500mAh battery, and the IMR 3500mAh batteries from Shockli and Efest

Wow, this battery has a low price, about $4.30 each directly from Windyfire. I hope that they are not sending hand selected "ringers" to HKJ for testing.
They also have a 4500mAh IMR 26650 selling for $4.58. I assume HKJ has some of those to be tested.

Surprisingly, Windyfire is also selling Ultrafire and Trustfire on their website. No Shockli batteries however.

Haha, have you checked their shipping costs?

prices go skyhigh, for the total price these batteries will cost you, you can get genuine brandname cells from USA distributor in couple of days!

Sent them email, here's their reply:

Good day.




This is Linda from Shenzhen Windyfire
Technology Co.,Ltd, thanks for your order in our website
www.windyfire.com,

we have a agent in the USA, his name is
Richard,his website is http://www.mtnelectronics.com, you can contact
him

of the order, his price is very competitive. nearly the same as we ship from here if with shipping cost.but if you

buy from your local market, it will be
very soon from him,thanks.




Best regards.