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Specifications:
- UltraFire 18650 3000mAh 3.7V li-ion battery
- Low discharge rate, no memory effect
- Low reoccuring operation cost, short-circuit and over current protection sheef-life around 10years; environmental friendly
- The 18650 battery is rechargeable with no memory effect
- This UltraFire 18650 Rechargeable Lithium Battery has a long lifespan
- This 18650 UltraFire Rechargeable Lithium Battery is precisely engineered and rigorously tested for voltage, capacity, compatibility and safety
- 18650 UltraFire Rechargeable Lithium battery can be used for flashlight and some other power consuming objects
- Integrated microchip prevents overcharging and lengthens battery life
- Size: 68.5 x 18.8mm/2.70 x 0.74in (L x Dia.)
Details:
- Ultrafire 18650 battery allows you to get incredible runtime out of the flashlight
- Ultrafire Batteries are precisely engineered and rigorously tested for voltage, capacity, compatibility and safety
- UltraFire rechargeable lithium battery can be used for flashlight and some other power consuming objects
- Ultrafire batteries take much convenience for your daily life
What is lithium-ion batteries?
Lithium-ion batteries (sometimes abbreviated Li-ion batteries) are a type of rechargeable battery in which a lithium ion moves between the anode and cathode. The lithium ion moves from the anode to the cathode during discharge and in reverse, from the cathode to the anode, when charging. Lithium-ion batteries can be formed into a wide variety of shapes and sizes so as to efficiently fill available space in the devices they power. They're generally much lighter than other types of rechargeable batteries of the same size. The electrodes of a lithium-ion battery are made of lightweight lithium and carbon. Lithium is also a highly reactive element, meaning that a lot of energy can be stored in its atomic bonds. This translates into a very high energy density for lithium-ion batteries. Plus there is no issue with the memory effect, like the nickel-cadium does. When a nickel-cadium battery is recharged before it discharges the majority of its power, it essentially "forgets" that it could fully discharge to begin with. This problem is termed the memory effect.
What is lithium ion polymer rechargeable battery?
It's a high energy density, 3.6V/3.7V battery that is not compatible with ordinary batteries, but is widely used in the portable equipment market. It uses lithium metallic oxide (LixCoO2, LiNiO2, LiMnO4) in its positive electrode (cathode) and carbon material (LiXC6) in its negative electrode (anode), with electrolyte LiPF6, LiAsF6 etc, and the Lithium ions inside the battery transfer between the positive electrode and the negative electrode during charge or discharge, namely Rocking Chair Batteries (RCB).
Lithium ion polymer rechargeable battery similar to the Lithium-ion but with a solid polymer as electrolyte. Some gelled conductive material is added to promote conductivity. It utilizes the latest technology to become available for consumer use in products such as portable computers, PDA, cellular phones, blue tooth, portable DVD and military electronics etc. Lithium-ion polymer batteries have high voltage per cell, and excellent energy on both a weight and volume basis. Additionally, they can be made in very thin and large footprint configurations. Lithium-ion polymer batteries use liquid Lithium-ion electrochemistry in a matrix of conductive polymers that eliminate free electrolyte within the cell. For operating effectively over a broad range of temperatures and conditions, Lithium-ion polymer batteries contain no metallic Lithium anodes.
About Rechargeable Batteries
- Function
- Sometimes called a storage battery, a rechargeable battery consists of multiple cells. This enables the electrochemical reaction that powers the battery to be reversed. Using a charger, these batteries can be recharged many times. Rechargeable batteries are used in automobiles, consumer electronics, storage for solar arrays and electrical vehicles.
- Types
- The most common types of rechargeable batteries are lead-acid, nickel cadmium, alkaline, nickel metal hydride and lithium ion. Lithium ion batteries are considered the most advanced rechargeable battery type and are used in most contemporary consumer electronics.
- Size
- Rechargeable batteries come in many shapes and sizes from automobile lead-acid type batteries to laptop and small digital camera batteries. The size is determined by the type of technology used and the design of the device in which the battery will be placed.
- Features
- The main feature of a rechargeable battery is self-evident--it can be charged multiple times. Secondary features that differ depending on the type of battery include:
- Self-Discharge: This effect occurs within the battery cells causing the battery to lose power over time even when not in use.
- Memory Effect: An effect mostly witnessed in Nickel Cadmium batteries, the battery seems to lose its maximum energy capacity if charged multiple times without being fully discharged.
- Energy-to-Mass Ratio: This refers to the energy density of the battery.
- Currently, Lithium ion batteries are the best performing rechargeable batteries if considering the above features.
- Considerations
- Many people avoid rechargeable batteries when given a choice because of a perceived higher cost. When you consider that rechargeable batteries can be reused multiple times, the savings of using them as opposed to one use batteries becomes clear
Package Included:
- 2 x UltraFire Li-ion Batteries
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Jongkook Park
from ()
Bought this item on
10-26-2010- Other Thoughts: I have not had any problems at all. They are snug, but that is a good thing. Great batteries.
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Malanie Shashika
from ()
Bought this item on
09-20-2010- Other Thoughts: Not much to say except these batteries work really well with my Fenix flashlight. They last long. The flashlight burns brightly for a long time.
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Pang Michael
from ()
Bought this item on
04-20-2010- Other Thoughts: I received my order in record time. The product was even better than described! And the 2 Pcs UltraFire Protected 18650 Lithium Battery's price is the best I have ever seen. I will be ordering more from here in the very near future. Thank you for good information on website regarding product I wanted to buy.
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Raymond Rivera
from ()
Bought this item on
02-07-2010- Other Thoughts: I just took a shot at a possibility that this merchandise existed, but to my surprise they had exactly what I was looking for. Received merchandise on the promised day after placing the order. Great service. I just ordered something else from the company.
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Dick LePage
from ()
Bought this item on
08-17-2010- Other Thoughts: I bought two batteries form dinodirect. The first one is still charged and going strong. They take about 12 hours to charge, but I'm not put off by that. I give it 4 in stead of 5 stars because I believe I need to evaluate these over a longer period of time to give them 5 stars. So far, I'm pleased with the product.
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