1 new from £8.87

Have one to sell? Sell on Amazon

2 x Ultrafire® 18650 Protected Lot de 2 piles rechargeables 3.7V 3000 mAh Batteries

3.7 out of 5 stars 360 customer reviews

Available from these sellers.
1 new from £8.87
    This fits your .
  • Enter your model number above to make sure this fits.
  • Ultrafire 18650 3.7V 3000mAh Rechargeable Battery
  • Rechargeable Time up to 500 times
  • Dimensions : 65mm x 18mm
  • Cell Type : Li-ion, Cell Size : 18650
  • Battery Capacity :3.7V 3000mAh

High Quality Batteries from AmazonBasics
Alkaline - AA
Alkaline - AA
£3.39
Alkaline - AAA
Alkaline - AAA
£3.39
Rechargeable - AA
Rechargeable - AA
£12.99
Rechargeable - AAA
Rechargeable - AAA
£9.79

Special Offers and Product Promotions


Product details

  • Boxed-product Weight: 82 g
  • Delivery information: We cannot deliver certain products outside mainland UK ( Details). We will only be able to confirm if this product can be delivered to your chosen address when you enter your delivery address at checkout.
  • Item model number: Ultrafire-B8630P
  • ASIN: B0070QEOA4
  • Date first available at Amazon.co.uk: 23 Jan. 2012
  • Average Customer Review: 3.7 out of 5 stars  See all reviews (360 customer reviews)
  • Amazon Bestsellers Rank:

Product Description

Integrated battery overcharge
discharge protection circuits. High discharge performance Li-ion Rechargeable Battery.
More than 500 charge-discharge cycles.

Note:On first charge, it gives less nominal 3000 mAh. It will take almost 10 cycles of charging, discharging for reaching maximum capacity would may be up to 3000 mAh.
Specification:
Dimension :18*650mm
Voltage:3.7 v
Mark Capacity 3000mAh
Actual Capacity 2400mAh
Material:lithium
Charge voltage:4.2v±0.05v
Max Continuous Discharge: 10A
Application:Particularly suitable for flashlight, electric tools, electric bicycles, electric vehicles. torch, digital camera and other digital products.
Standard voltage is 3.7V, the voltage of full charge & empty condition is 4.2v & 2.5v respectively
Package:2 x 18650 battery



Customer Questions & Answers

Customer Reviews

Top Customer Reviews

Verified Purchase
The batteries I received (from "Topwell") are red and grey (as in the current picture), say UltraFire on them and are labelled as 18650 and 3000mAh (no space).

I was surprised at how light they felt so I weighed them. They were 33gms whereas some older 18650 batteries I have are 46.5 gms.

With some NiMh batteries I find it is common for sellers to claim a high capacity where the batteries are actually of low capacity - and have a correspondingly low weight compared with good ones.

Does the same principle apply to Li-ion batteries?

To find out I made a test circuit (discharging though an ammeter and a 2.5 Ohm resistor) to measure capacity. As a control, I also tested one of my old 3860 batteries ("Asucell" and labelled as 3000 mAh and I measured the output at 2853 mAh - quite good for a well used 18 month old battery I'd have thought.

I then tested both of these Fire batteries and the capacity is showing up as just over 800 mAh - so less than 30% of that claimed.

I gather that one of the operations of the protection circuits in Lithium ion batteries is to prevent damage caused by discharging below 5% of capacity. I noticed that the old batteries I have cut out when voltage got too low - presumably the circuit is working, whereas these "UltraFire" batteries did not cut out so I wonder if they have any protection circuits at all.

Lithium ion batteries can be dangerous. As the 3000 mAh label is a lie, don't trust the "protected" label.

Avoid.
3 Comments 166 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
Thank you for your feedback.
Sorry, we failed to record your vote. Please try again
Report abuse
Verified Purchase
Arrived in good time. Packaging was fine. Put on charge, it didnt fully charge after hours, I did some research and found that these batteries where taken from used laptops, repackaged and resold... and on top of that, they didnt fit in the device I have.
Contacted the company, they gave me a full refund on return of the items.
Comment 39 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
Thank you for your feedback.
Sorry, we failed to record your vote. Please try again
Report abuse
Verified Purchase
I bought six of these and only two of them work

The rest don't charge properly.
Too good to be true.
Comment 44 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
Thank you for your feedback.
Sorry, we failed to record your vote. Please try again
Report abuse
Verified Purchase
I found the capacity of these to be nowhere near the 3000 milliamp claimed, out of curiosity I 'unwrapped' them to see if the true value may be marked somewhere, no markings but what I did find beggars belief, they're repackaged secondhand cells!
Comment 65 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
Thank you for your feedback.
Sorry, we failed to record your vote. Please try again
Report abuse
They work but after testing them they are not 3000 mah. I would choose a different make next time due to this as it's false advertising
1 Comment 46 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
Thank you for your feedback.
Sorry, we failed to record your vote. Please try again
Report abuse
Verified Purchase
I bought a cree headlamp to use when cycling to work realising it did not come with batteries i orderded two 18650 batteries as recommended I charged them the first time i used it the torch was great.Five days ago i charged the pack up only for three hours On leaving my property for some time came back to find the pack had exploded an caused asmall fire on my kitchen worktop how it did not cause unthinkable damage or injury i will never know I thought you would like to hear this and forewarn others Is there any way these could be replaced
3 Comments 76 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
Thank you for your feedback.
Sorry, we failed to record your vote. Please try again
Report abuse
Beware of Ultrafire labeled products. If you look on line for' fake Ultrafire batteries' you will be surprised at what is being put on the market. It is possible that a genuine Ultrafire product is reasonable but can anyone, even importers, tell which is fake and which is a genuine product.
The one that I took to pieces was full of what looked like proper cell material, no chalk packing, but what was supposed to be the safety over charging / discharging device inside the cap did not a look genuine piece of kit. Dont try this indoors or if you dont know what you are doing because even a battery that appears dead flat can still have a considerable charge if the internal safety device has operated or failed, which means that dismantling could cause fire, injury or contamination. Measuring the amp hours of lion cells cannot be done reliably by discharging with a lamp or similar load whilst measuring time and current because it will discharge below the threashold voltage of about 3 volts and the cell will be damaged or un recoverable.
Comment 21 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
Thank you for your feedback.
Sorry, we failed to record your vote. Please try again
Report abuse
Verified Purchase
Terrible purchase ' batteries are utter crap one of them blew up nearly hit my face as I was using it in my e-cig mod ' from the time I got them they where in the bin with 40 mins
Comment 23 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
Thank you for your feedback.
Sorry, we failed to record your vote. Please try again
Report abuse