Test/Review of Windyfire IMR14500 600mAh (Red)

Windyfire IMR14500 600mAh (Red)



Official specifications:

  • Type of Battery: IMR 14500/650mAh
  • Size(mm): 14mm(Diameter) x 50mm(Length)
  • Positive Shape: flat top
  • Weight(g): 20±1g
  • Nominal Voltage: 3.7V
  • Nominal Capacity: 670mah(0.2 C Discharge)
  • Minimum Capacity: 650mah(0.2 C Discharge)
  • Discharge Cut-off voltage: 3 V
  • Standard Charge: 0.4 A /4.2V
  • Maximum charge current: 1.95A
  • Quick Discharge Current: 6.500 A
  • Max Discharge Current: 9.750 A
  • Initial Impedance: Max:20mOhm
  • Cycle Life: 310times: discharging capacity >85%, 510times: discharging capacity>60%
  • Temperature Characteristics: -10°C/0.2C >80% Capacity; 20°C/0.2C =100% Capacity;60°C/0.2C >95% Capacity
  • Charging Time: Standard charge : 5-7hours, Rapid charge : 2-3hours
  • Operating environment: Charging, 0°C ~ 45°C ; 65±20%RH, Discharging, -20°C~60°C ; 65±20%RH
  • Storage environment: Temp(-20°c ~ 35°c) / Relative humidity (45-75%)




This is a high power 14500 cell.











The curves tracks fairly well, but there is a small capacity difference between the two cells. They are very impressive in their handling of high currents, capacity is nearly the same, even at 7A and the voltage is fairly high.















Conclusion

These cells are fairly low in capacity, but better than specified. Their high current handling is very good.
I will give them an acceptable rating.



Notes and links

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
Comparison to other LiIon batteries

The name is… insane. I won’t wanna show that battery to friends, else wont hear the end of it.

But nevertheless very impressive result for a cheap 14500. The 7A result especially - capacity still >600mAh, nice…

Any source right now that doesn’t sell in bulk? All I see currently is 50pcs minimum.

Lets do a group buy.
Where are the 50 available.
Or better yet, ask MTN Electronics to stock them
on his site, the best site on planet Earth for batteries.

If can maintain those discharges rate for few cycles, that’s good.
I think better than many others IMR 14500, that usually stated higher capacity, but end up have lower capacity for higher discharge rate than this one.

+1

Hhmm. This looks like the best 14500 cell HKJ tested, as far as having the lowest internal resistance. Plus it has higher capacity than 750 labeled IMR cells. We gotta get some of these - somehow. The Sibiele or AW IMR is the closest, closely resembling it's discharge curve at 2A for example, but the WindyFire hold a higher voltage and for higher capacity. It clearly beats the Kinoko IMR 750 mAh.

I'm thinking we'll see these cells under different labels, maybe soon.

Looks good, although we’d have to cover up the windyfire labels if we got some of these :smiley:

It's good to see a *fire brand that has good batteries. Thanks for the test!

Very interesting…need some of those for my 14500 only lights…

Nice review HKJ…thanks!

Hello, Everyone, gald to meet you here, this is Linda from Shenzhen Windyfire Technology Co.,Ltd, and thanks for your feedback,
our company are specilizing in battery especially high drain battery for cigarette, if you want to buy Windyfire battery, you can login in our website www.windyfire.com and make the order, some customer had try buy this way, hope you have a pleasure shopping, also any questions, you can leave message to me, thanks.

linda - how does the cost of shipping work? The site says it will email the cost? Yikes - this is terribly unfriendly. I would only be interested in the cheapest method. Your listed prices are very good on just about everything, so have a feeling shipping is extremely high Frown.

Hello, Friend, this is Linda from Shenzhen Windyfire Technology Co.,Ltd, glad to meet you here, and gald to know you are interested in our battery, we have a company website www.windyfire.com, and you can register on it and make order from our company, or if any questions, please do not hesitate to sent email to me, my email is linda@windyfire.com.thanks very much.

Dear Friend,this is Linda from Shenzhen Windyfire Technology Co.,Ltd, gald to know you are interested in our battery, our company have a company website www.windyfire.com, you can register on it and see what you are interested in, any questions, you can sent email to me, my email address is linda@windyfire.com.

When I read the Fire in the name, I almost didn’t even read the review. lol But looks fairly promising. Thanks for taking the time to review them.

[quote=windyfire-linda]
Dear Friend,this is Linda from Shenzhen Windyfire Technology Co.,Ltd, gald to know you are interested in our battery, our company have a company website www.windyfire.com, you can register on it and see what you are interested in, any questions, you can sent email to me, my email address is linda@windyfire.com.
[/quote
]

Linda - thanks for responding. I did register and did attempt to order batteries and have not gotten an email reply yet about shipping costs. I'll email you.

Dear Friend, this is Linda from Shenzhen Windyfire Technology Co.,Ltd, thanks for your comments of our battery, you can visite our website www.windyfire.com and register on it ,and make order from the website , any questions, please contact me by email, my email address is linda@windyfire.com.thanks very much.

Hello, Tom, this is Linda from Shenzhen Windyfire ,thanks for your register on our website www.windyfire.com, thanks for your good questions, and i reply all you questions by email linda@windyfire.com, please check it, any questions, please feel free to contact me, thanks very much.Tom.

The battery performance certainly looks very good, but we can already see some potential issues with customer service judging by the amount and spammyness of the rep’s replies.

KuoH

Hello,Tom, i had sent email to you about your order, please check your email, any questions, please feel free to contact me.
have a great day.

Dear friend, we understand your anxious for the customer service, for every questions from our customer, we should responsible and help them deal with it patience, for many customer, maybe have the same questions,like shipping cost, like delivey time,this is they are most concern, our company will give suggestions to them one by one based on their requirements. if you have any questions or need more information from us, please contact my email linda@windyfire.com, thanks very much.

Linda, I’m sure people can read your first post just fine. No need to copy and paste them again and again.

Tom E, appreciate if you can share your order details - price, qty, shipping etc?