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TrustFire®

18650 2500mAh 3.7V Rechargeable Li-ion Battery 2 Pcs

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US $9.99
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What do you expect from a battery? This TrustFire 18650 2500mAh 3.7V Rechargeable Li-ion Battery 2 Pcs will allow you to get incredible runtime. A protection circuit is attached to the TrustFire battery to ensure that you do not overcharge or over discharge the battery. To save you a lot of trouble, try this battery! The voltage of full charge and cut-off discharge is 4.2V and 2.75V. Good in low and high temperature operations. This Rechargeable Li-ion Battery provides excellent continuous power sources to your device.This 18650 Rechargeable Battery is of high security, pollution-free, no memory effects. Great for flashlights, toys, remote controls etc.

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Product Description

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  • Specifications:

    • The voltage of full charge and cut-off discharge is 4.2V and 2.75V
    • Don't heat, incinerate or reverse polarity
    • This Rechargeable Li-ion Battery is environment friendly
    • The 18650 Rechargeable Battery is good in low and high temperature operations
    • High energy density, long life TrustFire battery
    • This Rechargeable Li-ion Battery provides excellent continuous power sources to your device
    • Nominal Capacity: 2500mAh
    • Voltage: 3.7V
    • Size: 65 x 18mm / 2.6 x 0.7in (L x Dia.)

    Details:
    TrustFire TrustFire 18650 2500mAh 3.7V Rechargeable Li-ion Battery 2 Pcs



    • The voltage of full charge and cut-off discharge is 4.2V and 2.75V. Good in low and high temperature operations

    Rechargeable Li-ion Battery



    • A protection circuit is attached to the battery to ensure that you do not overcharge or over discharge the battery

    TrustFire Battery





    • This Rechargeable Li-ion Battery is of high security, pollution-free, no memory effects. Great for flashlights, toys, remote controls etc.

    Size in Detail:

    18650 Rechargeable Battery


    What rechargeable battery is:

    B003M7HV50

    • A rechargeable battery or storage battery is a group of one or more electrochemical cells. They are known as secondary cells because their electrochemical reactions are electrically reversible. Rechargeable batteries come in many different shapes and sizes, ranging anything from a button cell to megawatt systems connected to stabilize an electrical distribution network. Several different combinations of chemicals are commonly used, including: lead-acid, nickel cadmium (NiCd), nickel metal hydride (NiMH), lithium ion (Li-ion), and lithium ion polymer (Li-ion polymer)
    • Rechargeable batteries have lower total cost of use and environmental impact than disposable batteries. Some rechargeable battery types are available in the same sizes as disposable types. Rechargeable batteries have higher initial cost, but can be recharged very cheaply and used many times.

    Usage and applications:

    TrustFire TrustFire 18650 2500mAh 3.7V Rechargeable Li-ion Battery 2 Pcs

    • Rechargeable batteries are used for automobile starters, portable consumer devices, light vehicles (such as motorized wheelchairs, golf carts, electric bicycles, and electric forklifts), tools, and uninterruptible power supplies. Emerging applications in hybrid electric vehicles and electric vehicles are driving the technology to reduce cost and weight and increase lifetime.[1]
    • Normally, new rechargeable batteries have to be charged before use; newer low self-discharge batteries hold their charge for many months, and are supplied charged to about 70% of their rated capacity.
    • Grid energy storage applications use rechargeable batteries for load leveling, where they store electric energy for use during peak load periods, and for renewable energy uses, such as storing power generated from photovoltaic arrays during the day to be used at night. By charging batteries during periods of low demand and returning energy to the grid during periods of high electrical demand, load-leveling helps eliminate the need for expensive peaking power plants and helps amortize the cost of generators over more hours of operation.
    • The US National Electrical Manufacturers Association has estimated that U.S. demand for rechargeable batteries is growing twice as fast as demand for nonrechargeables

    Charging and discharging:

    Rechargeable Li-ion Battery

    Diagram of the charging of a secondary cell battery

    • During charging, the positive active material is oxidized, producing electrons, and the negative material is reduced, consuming electrons. These electrons constitute the current flow in the external circuit. The electrolyte may serve as a simple buffer for ion flow between the electrodes, as in lithium-ion and nickel-cadmium cells, or it may be an active participant in the electrochemical reaction, as in lead-acid cells.
    • The energy used to charge rechargeable batteries usually comes from a battery charger using AC mains electricity. Chargers take from a few minutes (rapid chargers) to several hours to charge a battery. Most batteries are capable of being charged far faster than simple battery chargers are capable of; there are chargers that can charge consumer sizes of NiMH batteries in 15 minutes. Fast charges must have multiple ways of detecting full charge (voltage, temperature, etc.) to stop charging before onset of harmful overcharging.
    • Rechargeable multi-cell batteries are susceptible to cell damage due to reverse charging if they are fully discharged. Fully integrated battery chargers that optimize the charging current are available.
    • Attempting to recharge non-rechargeable batteries with unsuitable equipment may cause battery explosion.
    • Flow batteries, used for specialised applications, are recharged by replacing the electrolyte liquid.
    • Battery manufacturers' technical notes often refer to VPC; this is volts per cell, and refers to the individual secondary cells that make up the battery. For example, to charge a 12 V battery (containing 6 cells of 2 V each) at 2.3 VPC requires a voltage of 13.8 V across the battery's terminals.
    • Non-rechargeable alkaline and zinc-carbon cells output 1.5V when new, but this voltage gradually drops with use. Most NiMH AA and AAA batteries rate their cells at 1.2 V, and can usually be used in equipment designed to use alkaline batteries up to an end-point of 0.9 to 1.2V.

    Reverse charging:

    • Subjecting a discharged cell to a current in the direction which tends to discharge it further, rather than charge it, is called reverse charging; this damages cells. Reverse charging can occur under a number of circumstances, the two most common being:
    • When a battery or cell is connected to a charging circuit the wrong way round.
    • When a battery made of several cells connected in series is deeply discharged.
    • When one cell completely discharges ahead of the rest, the live cells will apply a reverse current to the discharged cell ("cell reversal"). This can happen even to a "weak" cell that is not fully discharged. If the battery drain current is high enough, the weak cell's internal resistance can experience a reverse voltage that is greater than the cell's remaining internal forward voltage. This results in the reversal of the weak cell's polarity while the current is flowing through the cells[3][4]. This can significantly shortens the life of the affected cell and therefore of the battery. The higher the discharge rate of the battery needs to be, the better matched the cells should be, both in kind of cell and state of charge. In some extreme cases, the reversed cell can begin to emit smoke or catch fire.
    • In critical applications using Ni-Cad batteries, such as in aircraft, each cell is individually discharged by connecting a load clip across the terminals of each cell, thereby avoiding cell reversal, then charging the cells in series

    Common rechargeable battery types:

    TrustFire Battery

    • Graph of mass and volume energy densities of several secondary cells

    Nickel-cadmium battery (NiCd):

    • Created by Waldemar Jungner of Sweden in 1899, based on Thomas Edison's first alkaline battery[citation needed]. Using nickel oxide hydroxide and metallic cadmium as electrodes. Cadmium is a toxic element, and was banned for most uses by the European Union in 2004. Nickel-cadmium batteries have been almost completely superseded by nickel-metal hydride (NiMH) batteries.

    Nickel-metal hydride battery (NiMH):

    • First commercial types were available in 1989.[20] These are now a common consumer and industrial type. The battery has a hydrogen-absorbing alloy for the negative electrode instead of cadmium.

    Lithium-ion battery:

    • The technology behind lithium-ion battery has not yet fully reached maturity. However, the batteries are the type of choice in many consumer electronics and have one of the best energy-to-mass ratios and a very slow loss of charge when not in use.

    Lithium-ion polymer battery:

    • These batteries are light in weight and can be made in any shape desired.

    Battery Capacity:

    • Look for batteries with a higher milliampere hour (mAh) rating. This refers to the amount of electricity delivered at any given moment. Electronic devices can handle a range of mAh without damaging the device. So as the rechargeable batteries begin to lose power, they do no damage to the device. Batteries with a higher mAh may look exactly like a battery with a lower mAh but typically they cost more.

    Battery Chargers:

    • Buy the battery charger that suits your needs. In some instances you can purchase the charger and batteries as a package deal, but if you want your battery charger to maintain your rechargeable batteries properly, you may need to pay more for special features.
    • Look for a battery charger that recharges a variety of battery sizes. Select a unit that has a reconditioning cycle. This keeps you from overcharging your batteries. Some models do this automatically while others have a switch you must flip to go into reconditioning mode.

    Warnings:

    • Do use the specialized accesory to recharge
    • The input voltage of any appliance must be in the range of the output of the battery, otherwise it can do harm to the applince
    • To avoid the decending capacity, the battery must not be put away over 1 year
    • Away from high temperature, and kept in cool dry place

    4 Tips to Extend Your Lithium Battery Life:

    • Battery Memory - When I first got my new cellphone, my friend recommended to fully drain the battery before recharging it. His reasoning was connected to the idea of battery memory. Allowing the battery to fully discharge then recharging to max, supposedly gives you the complete battery capacity. Otherwise, if you simply charged from the half way point to max battery capacity, the battery would treat the half way point as the empty point, thus cutting your battery capacity in half
    • Battery Calibration - There are some benefits to fully discharging your lithium battery periodically, for laptops this can be especially important. If you start to notice your battery meter becoming more and more inaccurate, it may be time for some battery calibration. Allow your lithium battery completely drain, then charge until the battery is full again. This will calibrate your battery  giving you more accurate readings
    • Consequences of Heat - Another enemy of lithium battery life is heat. If you were to leave your laptop plugged in and running for a year, you should expect the lithium battery capacity to be anywhere between 60% to 80% of it's original max capacity. This is why people that use their laptops as desktop replacements will notice greatly reduced battery life performance after one year of use. This issue can be resolved by removing the battery while using a corded power source
    • Battery Storage - If you don't plan on using your lithium battery for prolonged periods of time, then you'll want to reduce the charge level to 40% and place the battery in the fridge (not freezer). Storing the battery at 100% charge level applies unnecessary stress and can cause internal corrosion. On the other hand, if the charge is too low, the battery can become permanently unusable, due to battery self discharge

    Instruction: 

    • Charging the batteries when only a small amount of power has been used is hard on them, and will reduce their life span
    • Try to let the batteries completely discharge before putting them on the charger
    • Many electronic items, including digital cameras, portable game systems and music players use rechargeable batteries
    • The choice to use rechargeable batteries helps reduce chemical waste, and is a cost savings for the user over time
    • Rechargeable batteries are used for flashlight
    • The pictures of our Battery are real and if there is something tinny difference, please ignore 

    NOTE:

    • Strongly suggest you use the protected battery for it can really protect your battery well and extend your battery life as well as avoid the over-charging and over-discharging of your battery
    • We are not responsible for the broken of the battery and charger for your users' wrong using methods 
    • Rechargeable batteries that have been in storage for weeks or months will lose power and need to be recharged before being used 

    Package Included:

    • 2 x Rechargeable Li-ion Batteries

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Average Customer Review:
  ( 35 Reviews)
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Vicky

Bought this item on

02-21-2012

 
good value
00:00:00 02-21-2012
By ordering in this manner, it helps to remind me to do so. The reminder pops up, and I seek the best price with least shipping cost.
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Voltaire

Bought this item on

02-07-2012

 
A++
00:00:00 02-07-2012
These are no exception. Not always the cheapest but I got a good deal here. Thanks a lot!!
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Lucy

Bought this item on

01-29-2012

 
Love Price!!!
00:00:00 01-29-2012
Great price.. they are like any batteries you find in the store.. but they are cheaper. <br/> <br/>You get more for your money!
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Justin

Bought this item on

01-24-2012

 
Good price
00:00:00 01-24-2012
At time of this review the price is a tad higher than buying at Lowes but less if you go subscribe and save. I like staying at home to buy stuff for less money :)
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Maria

Bought this item on

01-17-2012

 
Great Price for Great Product
00:00:00 01-17-2012
I have done my own tests and found that batteries lasts longer than other batteries i have tried. <br/>Using the subscribe and save feature allows me to get the best deal on these reliable batteries.
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Nick

Bought this item on

01-10-2012

 
You can't beat this
00:00:00 01-10-2012
Does what they do

No more waiting for drug store coupons for a deal on batteries. I bought these and then signed up for regular delivery, so I'll save even more. I've never seen prices like this.

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Kenneth

Bought this item on

12-21-2011

 
Good consistent performance
00:00:00 12-21-2011
The batteries I have purchased in the past and on this order have performed very well.
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Will

Bought this item on

12-13-2011

 
Great Price
00:00:00 12-13-2011
It is a well known fact that batteries are some of the longest lasting batteries that you can purchase ~ great for toys, cameras, all of your electronic gadgets. What makes this package even better is the hassle free packaging, easy to open and easy to store.
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Linda

Bought this item on

12-05-2011

 
batteries
00:00:00 12-05-2011
batteries came in excellent condition and in a timely manner and i am very pleased with the discount i receive whenever i purchase them. thank you
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Jing Gu

Bought this item on

11-21-2011

 
Good purchase!!
00:00:00 11-21-2011
Best device I've bought here

This is the first time I ever purchased batteries online. <br/>The price is unbeatable, and it really lasts! <br/>Highly recommended!

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