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  • 4pcs Ultrafire 18650 3000 mAh 3.7V Li-ion Rechargeable Battery+1pcs Charger
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4pcs Ultrafire 18650 3000 mAh 3.7V Li-ion Rechargeable Battery+1pcs Charger

| 9 answered questions

List Price: $129.99
Price: $10.33 & FREE Shipping on orders over $35. Details
You Save: $119.66 (92%)
In Stock.
Sold by LTMX and Fulfilled by Amazon. Gift-wrap available.
only Batteries
RED
  • High quality and durable
  • Provides excellent continuous power sources to your device
  • High energy density, long life battery
  • This battery has an extra long life for all your battery powered devices
  • Ultrafire 18650 3000 mAh 3.7V Li-ion Rechargeable Battery
34 new from $6.30

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$10.33 & FREE Shipping on orders over $35. Details In Stock. Sold by LTMX and Fulfilled by Amazon. Gift-wrap available.

Frequently Bought Together

4pcs Ultrafire 18650 3000 mAh 3.7V Li-ion Rechargeable Battery+1pcs Charger + Outdoor Waterproof 1600LM XM-L T6 LED Headlamp + 2 X 18650 Rechargeable Batteries + Charger + hkbayi New 3x CREE XM-L XML T6 LED 5000Lm Rechargeable Headlamp Headlight Head lamp + AC Charger
Price for all three: $40.81

Buy the selected items together


Product Description

Size: only Batteries | Color: RED

Features:
1.New battery
2.High quality and durable
3.Provides excellent continuous power sources to your device
4.High energy density, long life battery
5.This battery has an extra long life for all your battery powered devices
Specifications:
1. Battery Type:18650 battery
2. Voltage: 3.7v
3. Capacity: 3000mAh
4. Charge Time: about 6~8hours
5. Rechargeable Times: about 500~700
6. Material: Li-ion Battery
7. Weight: 180g
8. Dimensions: 6.5 x 1.7 cm(L x Dia)
Battery charger Input : AC100-240V, 50/60Hz Output : 4.2V-600mA World voltage (US Flip Plug) Charge complete within 2-3hrs Compatible with 18650 batteries

Product Details

Size: only Batteries | Color: RED
  • Product Dimensions: 5.3 x 1.1 x 2.4 inches ; 3.5 ounces
  • Shipping Weight: 8 ounces (View shipping rates and policies)
  • ASIN: B009LX94LI
  • Average Customer Review: 3.9 out of 5 stars  See all reviews (362 customer reviews)
  • Amazon Best Sellers Rank:

Customer Questions & Answers

Customer Reviews

3.9 out of 5 stars

Most Helpful Customer Reviews

37 of 39 people found the following review helpful By MGB on October 1, 2013
Size: only BatteriesColor: RED
These chargers are junk! They are everywhere because they are cheap. I'm an engineer, and part of my job is to prep items for, and run items through UL and FCC testing. These are not only noisy, and out of tolerances for FCC emissions, but based on what I see; there is no way these chargers could pass UL testing. They are dangerous! The contacts where the AC terminals connect to inside are poorly designs, made of cheap material, and in some cases can bend and touch each other. There is no thermal, overload, or short circuit protection. Anyone who values their safety will not use these. If you must use these chargers DO NOT leave them unattended for any amount of time. This is true not just for this one, but all of the 18650 and 14500 chargers that look like this one. They are all made from the same design, and with the same chap materials. Buy a good charger... These cheap Chinese electronics are made entirely for profit, and in no way do the manufactures EVER consider your safety. You are better off buying American made products when possible, or China made products who's quality, and designs are supervises by an American company.

The UtraFire batteries offered on Amazon are all knock-offs. If there are any real UltraFire batteries on Amazon; I have yet to find any. You can't really expect authentic UltraFire batteries price at less than about $10 US for a single. Most of us don't have that much money so we have to make do with what we can. The bad part about this situation is that most of these batteries are very poorly made, are made of used eWaste recovered laptop cells, or are 100% fake. The fake cells are made of metal or plastic cylinders with a cheap under powered Li-Po cell surrounded by some kind of powder to add weight, and keep the Li-Po cell from rattling around.
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74 of 83 people found the following review helpful By Spaceman on March 2, 2013
Size: only BatteriesColor: RED
I have had years of professional experience in testing batteries, from aerospace to hearing aid batteries. I know how to test batteries & I have the equipment. I tested these based on the standard slow 20 hour discharge rate, not a high rate which makes the batteries look even worse.

This battery company is basically running something like a scam. I bought a total of 6 of these at 2 different times. My tests show that on average, they don't even measure up to a 1/3 of the 3000 mAh level claimed by UltraFire. One went totally dead after using only once.

Furthermore, they only have about the same power level as found in a triple pack of AAA batteries.

Therefore, buying these batteries makes no sense at all. Save yourself time & trouble & stay with lights that use the triple pack of AAA batteries. Keep it simple......
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17 of 18 people found the following review helpful By jackbnimble on October 24, 2013
Size: only BatteriesColor: RED
This brand and manufacturer is 100% unreliable ... bought 4 flashlights from them pre-Sandy (the storm) ... used them during Sandy and they worked fine. Post Sandy ALL flashlights and batteries failed! As follows: 2 batteries simply starting leaking in the charger (also an Ultrafire charger) - tossed; 2 batteries never recharged again - tossed; 2 batteries charged only partially - tossed; 1 flashlight simply burned out (all LEDs) - tossed; 2nd flashlight partially burned out - main center LED which was generating most light - tossed; 3rd flashlight - never turned on again - on/off switch just stuck and would not disengage - tossed; 4th flashlight - constant flicker no matter what setting I put the on/off switch on - tossed. So let's do the math here: over $150 of essentially throw away flashlights, batteries and chargers for a one time event. No matter how you look at this it's a ridiculous proposition - next I am going back to Fenix - also equally expensive for just one but it lasted for 6 years. Enough said ... this mfg.'er should stop selling this garbage made in China with zero standards - the fact that reviews on here say that they replace garbage you bought with new garbage you'll soon throw out does not make them a good merchant folks.
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17 of 18 people found the following review helpful By Chris P Oder on July 15, 2013
Size: only BatteriesColor: RED Verified Purchase
The product itself did not hold a charge after it's first use. Beware of the cheap price. You are better off buying something else.
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11 of 11 people found the following review helpful By Thomas J Barbarich on March 4, 2014
Size: only BatteriesColor: RED
I am a battery researcher and bought these batteries to help test and set-up a battery prototype lab.

The batteries I tested had less than 0.7 Ah. That is less than 1/4 the rated capacity.

Furthermore, these might present a SAFETY hazard. I speculate that they may be recycled old batteries (with a nice shiny new label) in which case the cells that you receive could be in different conditions. Using multiple Li-ion cells in a battery unit where the batteries are in different states can be hazardous as one of the cells could be overcharged (potential for a fire/explosion) before the other cell is fully charged.

Amazon should remove them from their site.
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9 of 9 people found the following review helpful By Mitch Martin on September 30, 2014
Size: full sizeColor: Green Verified Purchase
First off I would have to say to people looking at this item to save a few bucks and to purchase JUST the batteries. The charger it comes with is a cheap Chinese thing that claims an output of "DC 4.2V and 650mAh". That's not too bad if it was true. Opening the device up, the first thing I notice is that there isn't even a full bridge rectifier circuit for the mains power (my first insight about just how cheap the charger is). Inside I also find an HT3582D chip at the heart of the charging circuit. Looking at the datasheet for this chip, I notice that it can only handle a max output of 400mA, and 250mA nominal (far from the 650mAh on the back of the charger). So I put this to a test on some test equipment I have. With just one battery in, there is a constant 57mA draw from the battery to just light that little LED on it (which stays on all the time by the way). When charging, it starts out supplying about 500mA at 4.2V. and quickly drops to ~440mA. The chip inside heats up rapidly (measured 170 degrees F) which is probably why the current decreases (and also since the chip is way above it's maximum). I find it kind of comical that the brand of this chip is "HotChip" haha! Avoid using the charger if you care about not burning down your house.

Now to the batteries,
From the factory, they all came charged to about 3.82V. This is fine as a storage voltage. Before even charging them, I wanted to see what capacity they had. I set a cutoff voltage of 3V at a 500mA current draw. Batt 1 had 1.311Ah capacity, Batt 2 had 1.285Ah capacity. Not too bad! I now wanted to see what the charger it came with (complete junk) could do with charging them. I let them charge for about 14 hours from my previous discharge measurements. This sounded fine as it stated in the description "8.
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