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Sold by: Tenergy Corporation
Sold by: Tenergy Corporation
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Tenergy TN456 Intelligent Universal Battery Charger with 4 Slots, LCD Display, USB Output, Power Adapter, Rechargeable Battery Charger for Li-ion/NiMH/NiCD Rechargeable Batteries

4.4 4.4 out of 5 stars 370 ratings
Amazon's Choice highlights highly rated, well-priced products available to ship immediately.
Amazon's Choice in Household Battery & Charger Sets by Tenergy

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Brand Tenergy
Color Black
Product Dimensions 5"D x 5"W x 10"H
Item Weight 192 Grams
Input Voltage 240 Volts

About this item

  • All in one charger - The Tenergy TN456 universal battery charger works with different sized cells of NiMH, NiCd or Li-ion. Charge any of these NiMH/NiCd sizes- AA, AAA, A, Sub C, C along with Lithium-ion (Li-ion) sizes- 26650, 22650, 18650, 18490, 18500, 17670, 17500, 17335, 16340 (123A), 14500 (AA), 10440 (AAA).
  • Personalized charging - With four individual charging slots, the TN456 smart battery charger is not limited by charging in pairs or even same cells. Each charging slot can be personalized to a specific battery to change its settings (mode/charging current). *Recharges only 2 C size batteries at once.
  • Dual modes - Built in are two modes, CHARGE and TEST. The charge mode features current selection (300-1000mA) that allows you to set the charge current for each battery. While the test mode tests the capacity of your battery.
  • Easy to use - With just one button, easily toggle between display options to view charge/discharge capacity, battery voltage, charge/discharge current, internal resistance, or elapsed time. The backlit LCD is visible and easy to read. In addition to charging batteries, TN456 also has a USB port that charges your portable devices simultaneously.
  • Backed by Tenergy 1 year warranty along with lifetime support from our friendly customer service based in California.

Additional Details

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Tenergy TN456 Intelligent Universal Battery Charger with 4 Slots, LCD Display, USB Output, Power Adapter, Rechargeable Battery Charger for Li-ion/NiMH/NiCD Rechargeable Batteries
Tenergy TN456 Intelligent Universal Battery Charger with 4 Slots, LCD Display, USB Output, Power Adapter, Rechargeable Battery Charger for Li-ion/NiMH/NiCD Rechargeable Batteries
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Price$39.99$14.99-28% $33.11
Typical:$45.99
$19.99$59.30$23.99
Delivery
Get it as soon as Monday, Apr 1
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Customer Ratings
Easy to use
4.0
3.8
4.4
4.7
4.6
Value for money
4.0
3.9
4.2
4.5
4.3
Battery life
3.5
4.0
3.8
Sold By
Tenergy Corporation
Tenergy Corporation
EBL official
BONAI
DC Workshop
Tenergy Corporation
input voltage
240 volts
5 volts
110 volts of alternating current
5 volts
240 volts
240 volts
weight
192 grams
64 grams
0.71 pounds
0.68 pounds
0.65 kilograms
145 grams

Product Description

tenergy smart universal charger

**Only recharges a max of 2 C size batteries at once.

Individual Channel Control

  • TN456’s four channel select buttons let you choose a specific battery and change its setting (mode / charging current) at will.

5V/1A USB Charging Port

  • In addition to charging your batteries, TN456 also has a 5V USB port that charges your portable devices (such as your smartphone) simultaneously.

  • Charge Mode: Charges your batteries at the desired current (300-1000mA).
  • Test Mode: Tests the capacity of your batteries.

Backlit LCD with Display Options

  • With just one button, easily toggle between display options to view charge/discharge capacity, battery voltage, charge /discharge current, internal resistance, or elapsed time. The backlit LCD display lets you read easily, even in the dark.

Package Contents:

  • TN456 charger x 1
  • Power adapter x 1
  • User’s manual x 1

Technical Specifications:

  • Input: AC 100-240V / DC 12V / 3.0A
  • Output 1: 1.48V x 4 (300mA / 500mA / 700mA / 1000mA)
  • Output 2 4.2V x 4 (300mA / 500mA / 700mA / 1000mA)
  • Output 3: DC 5V/1A (USB Port)
  • Dimension: 157mm x 93mm x 34mm / 6.2” x 3.7” x 1.3”
  • Unit Weight: approx. 192 g / 0.42 lb

Product guides and documents

Product information

Warranty & Support

Product Warranty: For warranty information about this product, please click here

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Tenergy

Tenergy TN456 Intelligent Universal Battery Charger with 4 Slots, LCD Display, USB Output, Power Adapter, Rechargeable Battery Charger for Li-ion/NiMH/NiCD Rechargeable Batteries


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Customer reviews

4.4 out of 5 stars
4.4 out of 5
370 global ratings

Customers say

Customers like the accuracy of the battery charger. They say the individual displays of voltage, current, and time are accurate to better than 1%. They also like the build quality, charging, and battery capacity. However, some customers disagree on value, ease of use, performance, and display.

AI-generated from the text of customer reviews

45 customers mention38 positive7 negative

Customers like the charging of the battery charger. They say it's handy and can charge a wide variety of both NiMH and Li-ion cells. They also appreciate the constant lower currents, which prevents the battery from heating up excessively. Some customers also like the default charging current of 300mA, which you can change if necessary. The charger is versatile and can be used not only to charge batteries, but also as a battery tester. However, some customers have reported issues with the charging speed.

"...smart charger that's thought out and built well, recognizes an unusually wide range of batteries, charges them with precision, and even tests them..." Read more

"Reads battery internal resistance. Allows you to charge at constant lower currents, so battery doesn’t heat excessively" Read more

"...It can even handle various Li-ion batteries. It also allows you easily customize the current of the charge independently to each battery slot --..." Read more

"...It charges constant current (up to 1 amp) until the battery is at 4.21v then switches to constant voltage until termination...." Read more

15 customers mention12 positive3 negative

Customers like the battery capacity of the charger. They mention that it tests battery capacities, checks if the battery holds a charge, and measures battery capacity. The charger is versatile and can handle every battery type. It also reads battery internal resistance, which means the batteries last longer before needing a recharge. Customers also like the fact that they can test batteries and get an accurate reading. They say it can refresh old batteries and can be used as a battery tester/maintainer.

"...This means they will last longer before needing a recharge...." Read more

"Reads battery internal resistance. Allows you to charge at constant lower currents, so battery doesn’t heat excessively" Read more

"I charged and tested some Sony NIMH batteries. It ran for a long time and showed me the health of the batteries in terms of MAH capacity...." Read more

"Very versatile charger, handles every battery I have, old gen & new gen type batteries.Definitely recommend." Read more

7 customers mention7 positive0 negative

Customers are satisfied with the accuracy of the battery charger. They mention that the individual displays of voltage, current, and time are accurate to better than 1%. The product has a handy a/h meter that allows them to see how much energy they've put into each cell. Customers also appreciate the versatile monitoring choices and the display that is immediately updated to show the current charge.

"...Has a handy a/h meter so you can see how much energy you’ve put into each cell. All 4 slots are fully independent...." Read more

"...Voltage and current readings were accurate to better than 1%. Battery life tests gave consistent readings in mAH for NiMH and LiPO batteries...." Read more

"Used on AA, AAA, C sizes. Like how it gives actual numbers for each battery instead of a red green light." Read more

"...Love the individual displays of voltage current and time...." Read more

7 customers mention7 positive0 negative

Customers are satisfied with the build quality of the battery charger. They mention that it is well-made, dependable, and has the feel of a piece of good test equipment.

"The lowdown — A smart charger that's thought out and built well, recognizes an unusually wide range of batteries, charges them with precision, and..." Read more

"...It's well-built, easy to use, and does an excellent job of charging and testing a wide range of batteries." Read more

"...The build quality is great. Nice heavy duty plastic and quality contacts and springs for the slots. LCD is very legible and bright...." Read more

"...This thing has the feel of a piece of good test equipment...." Read more

26 customers mention15 positive11 negative

Customers are mixed about the performance of the battery charger. Some mention that it works great for NiMH and NiCd batteries, while others say that it doesn't work for AA and AAA cells. That said, opinions are mixed.

"...I stuck with defaults all the way. The process worked well and I was really happy. I used a sharpie to write numbers on all the batteries...." Read more

"This inexpensive charger has worked very well for me so far; I’ve charged 55 lithium ion batteries to full charge without any problems...." Read more

"...However the test/discharge does not work most of the time. It just charges the battery and tells you the capacity is 0 mAH...." Read more

"...batteries, it sits unused most of the time, because all the batteries work like new. Good for the planet too." Read more

16 customers mention10 positive6 negative

Customers are mixed about the value of the battery charger. Some mention that it's a good product, worth the money, and the instruction manual is light. However, others say that it is a poor value, has a manufacturing flaw, and is unable to charge batteries after a couple of months.

"...They stand behind their stuff, and the charger is worth the money. Couldn't carry out my hobbies without it...." Read more

"...It is a manufacturing flaw for sure, so a real waste of money. ( it was never dropped or abused)" Read more

"Individual charge ports is a must for me. It's a higher quality charger...." Read more

"...It did a good job while it worked, and the reviews are good enough I am probably going to get another one and cross my fingers." Read more

12 customers mention6 positive6 negative

Customers are mixed about the ease of use of the battery charger. Some mention it's easy to use, simple, and useful, while others say the instructions aren't clear, vague, and difficult to understand. The documentation is a bit sparse, and it can't test alkaline batteries.

"...The backlit LCD screen, highly legible, cycles through various data items as you press the Display button...." Read more

"...The documentation is a bit sparse and it can't test alkaline batteries, but I think it is the best charger for NIMH and lithium...." Read more

"...It's well-built, easy to use, and does an excellent job of charging and testing a wide range of batteries." Read more

"...My only quibble relates to ease of use, most particulalry evidenced by an abbreviated instruction manual...." Read more

5 customers mention3 positive2 negative

Customers have mixed opinions about the display of the battery charger. Some find it superb, legible, and bright, while others say it's completely scrambled and doesn't match the examples in the instructions.

"...It is well made and exudes a feeling of quality. The backlit LCD screen, highly legible, cycles through various data items as you press the Display..." Read more

"..."Test" mode is difficult to understand, and the display doesn't match the examples in the instructions...." Read more

"...The LCD screen is also a nice touch and provides useful information about the charging progress and battery capacity...." Read more

"...months I have had it and when I just went to use it the display is completely scrambled so when I put the batteries in to charge I wasn't sure if..." Read more

Amazing if you need to do NiCd+NiMH+Li-ion of various sizes (incl C) or want to customize current
4 Stars
Amazing if you need to do NiCd+NiMH+Li-ion of various sizes (incl C) or want to customize current
As the description and all the other reviews make clear, this can charge virtually any standard "small" consumer rechargeable battery, from A, to AAA, to AA, to sub-C, to C... whether NiCd or NiMH. It can even handle various Li-ion batteries. It also allows you easily customize the current of the charge independently to each battery slot -- from 300mA (default), to 500mA, to 1000mA -- and has clear guidance on the back (bottom) that suggests when to do so. On top of all that, it has a USB-A port that outputs 5V 1A, which is less than you'd want for any kind of modern device's USB charger, but still a nice touch. To power the charger itself, it has a wall-mount power-brick that is big, but still takes up less space (on the outlet) than a typical 4-AA wall-mount charger would.So all of that is great, but if you just want to drop your AA/AAA batteries into a charger and know when they're done, you DO NOT need this charger; get something cheaper like the "Tenergy TN480U 8-Bay LCD Display Fast Charger for NiMH/NiCD AA AAA" instead (which I also have). I love that thing because it can be powered by micro-USB or USB-C and always does 250mA for AAA batteries and 500mA for AA batteries. No thinking, no babysitting.Since you're still reading, you probably are interested in the discharge/test function. That's literally the only reason I bought this and it's also the most disappointing thing about it. Just like everything else, the test function can be triggered at any time for any battery slot independently of the others. Once you do it, it charges the battery to full, then discharges it completely, then charges it back up again -- all the while showing stats. When it's done, you're most likely interested in the total mAh value -- e.g., to see if those old batteries of yours still come anywhere close to their advertised capacity of 2300mAh.I tested a dozen AA and AAA batteries, both old and new. You can choose whether to use the default charge/discharge rates or to customize it. I stuck with defaults all the way. The process worked well and I was really happy. I used a sharpie to write numbers on all the batteries.Then it occurred to me: I have no idea if these numbers are correct. So I proceeded to re-test a bunch of them .... and that's where disappointment finally creeped in -- there was a difference of +/-100mAh for each battery. So in the end, my conclusion about the test feature is this: either the device is simply not that accurate enough to reproduce it's own results consistently, or battery capacity is really messy science. The discharge/test feature should help you suss out any very low-capacity batteries, but if you're just trying to optimize (e.g., to put your 3 2000mAh batteries into the same device and your other 3 1900mAh batteries in another device), it's not worth it.
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Reviewed in the United States on February 4, 2020
75 people found this helpful
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Reviewed in the United States on February 27, 2024
Reviewed in the United States on June 30, 2023
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4.0 out of 5 stars Amazing if you need to do NiCd+NiMH+Li-ion of various sizes (incl C) or want to customize current
Reviewed in the United States on June 30, 2023
As the description and all the other reviews make clear, this can charge virtually any standard "small" consumer rechargeable battery, from A, to AAA, to AA, to sub-C, to C... whether NiCd or NiMH. It can even handle various Li-ion batteries. It also allows you easily customize the current of the charge independently to each battery slot -- from 300mA (default), to 500mA, to 1000mA -- and has clear guidance on the back (bottom) that suggests when to do so. On top of all that, it has a USB-A port that outputs 5V 1A, which is less than you'd want for any kind of modern device's USB charger, but still a nice touch. To power the charger itself, it has a wall-mount power-brick that is big, but still takes up less space (on the outlet) than a typical 4-AA wall-mount charger would.

So all of that is great, but if you just want to drop your AA/AAA batteries into a charger and know when they're done, you DO NOT need this charger; get something cheaper like the "Tenergy TN480U 8-Bay LCD Display Fast Charger for NiMH/NiCD AA AAA" instead (which I also have). I love that thing because it can be powered by micro-USB or USB-C and always does 250mA for AAA batteries and 500mA for AA batteries. No thinking, no babysitting.

Since you're still reading, you probably are interested in the discharge/test function. That's literally the only reason I bought this and it's also the most disappointing thing about it. Just like everything else, the test function can be triggered at any time for any battery slot independently of the others. Once you do it, it charges the battery to full, then discharges it completely, then charges it back up again -- all the while showing stats. When it's done, you're most likely interested in the total mAh value -- e.g., to see if those old batteries of yours still come anywhere close to their advertised capacity of 2300mAh.

I tested a dozen AA and AAA batteries, both old and new. You can choose whether to use the default charge/discharge rates or to customize it. I stuck with defaults all the way. The process worked well and I was really happy. I used a sharpie to write numbers on all the batteries.

Then it occurred to me: I have no idea if these numbers are correct. So I proceeded to re-test a bunch of them .... and that's where disappointment finally creeped in -- there was a difference of +/-100mAh for each battery. So in the end, my conclusion about the test feature is this: either the device is simply not that accurate enough to reproduce it's own results consistently, or battery capacity is really messy science. The discharge/test feature should help you suss out any very low-capacity batteries, but if you're just trying to optimize (e.g., to put your 3 2000mAh batteries into the same device and your other 3 1900mAh batteries in another device), it's not worth it.
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18 people found this helpful
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Reviewed in the United States on September 10, 2023
2 people found this helpful
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Reviewed in the United States on December 6, 2023

Top reviews from other countries

NeuroEmergent
5.0 out of 5 stars Feature-packed charger
Reviewed in Canada on April 18, 2017
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NeuroEmergent
5.0 out of 5 stars Feature-packed charger
Reviewed in Canada on April 18, 2017
•• Quick Summation ••

The TN456 intelligent charger is excellent. It features an easy to read LCD display, multiple charging currents, and 4 slot capacity. I charge my AA's, AAA's, and 18650's without issue. You can charge 1 by itself or up to 4 completely different types of batteries at once. It also has a USB slot to charge phones. As far as I know, this isn't standard on most other battery chargers (such as the Nitecore D4). Lastly, it has a test function, where you can determine the true mAH rating of your batteries.

•• A little backstory + Differences Between Tenergy and Nitecore ••

Recently, I began using medical marijuana to treat a couple of issues, ranging from herniated disc pain to lingering concussion symptoms. I know, I know. That's how most battery charger reviews go, right? The point is, I acquired a vaporizer that requires 18650 lithium-ion batteries. Until a few months ago, I didn't know these monstrosities even existed. Unfortunately, the single battery charger my unit came with has a high failure rate. It also charges one at a time, so I wanted an upgrade (as I'd bought several spare batteries). According to my initial research, everything pointed towards the Nitecore D4. At the time of my research, the Nitecore D4 was $60. It has since dropped to $40, making it a great value. Well, the Tenergy is brand new to the Amazon Canada Marketplace. Are the differences worth $60? That'll be a matter of opinion.

Here are the major differences between the Nitecore D4 and the Tenergy TN456 as I see them:

1) Display Parameters - The Nitecore has a basic display, but it shows charge in mAH, voltage, and time spent charging. Similarly, on the Tenergy, you can cycle through the same parameters; however, they're displayed boldly and individually. Regarding the backlight, each company adopted the opposite methodology. Tenergy's screen is unlit unless you press the mode swap, which sparks the backlight, clearly illuminating the display even in the dark. On the Nitecore, the backlight is on by DEFAULT. You have to manually change it into night mode to turn the back-lighting off. Ultimately, I think the Tenergy's display is slightly nicer, particularly because of the individual battery info... but it's very close. WINNER: Very slight edge to Tenergy based on personal preference.

2) Current Range - The Nitecore advertises charging at 750mAH. This is true IF you are charging 1-2 batteries. However, if you charge 3-4, the current drops to 350mAH as a standard. Many Amazon reviewers have corroborated this, so it's not an occasional phenomenon. The Tenergy, on the other hand, can charge at several levels between 300mAH and 1000mAH (whichever you require), and when you charge 3-4, it will NOT drop the charging current. WINNER: Tenergy

3) Test Mode - The Tenergy has the ability to test your battery capacity, fully charging it, draining it, and then charging it to measured, test capacity. The Nitecore D4 does not have this capability. WINNER: Tenergy

4) Production Location - I could not find out where Nitecore chargers were manufactured. Their main website is aloof as to their production location. All I know is that their flashlights company is based out of Singapore, so... I still don't know where their chargers are manufactured. Tenergy is based out of Silicon Valley, California. They built a production plant there in 2009. So if you're looking to keep things local, Tenergy is a good bet. WINNER: Tenergy

5) Price - The Nitecore D4 started at $60. In 2015, it acquired an update, and more recently, it dropped to $40. This makes it a very strong candidate for a budget, no frills charger. The Tenergy is brand new on the Amazon Marketplace. At $60, you're paying for the difference in charging and North American make. WINNER: Depends on what you're looking for

~ Other Stuff ~

Each individual battery display flashes "FULL" when it's finished charging. That's aboot it.

•• Conclusion ••

The Tenergy TN456 is a great charger. If you want a unit that can test battery capacity and has a guaranteed 1000mAH charge capability, go with the Tenergy. Keep in mind, the additional phone charge slot. I suspect the price will lower the longer it's on the marketplace, too. One last point is that the instructions are written in very clear English. This isn't a Chinese re-brand with unintelligible instructions. If you're simply looking for a cheaper, effective charger, cast your gaze to the Nitecore series. The i4 is even cheaper than the D4; it simply lacks the LCD display.

Edited note: This charger does not come standard with a car adapter.
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15 people found this helpful
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Maya BeWell
5.0 out of 5 stars Good for environment, good enough for me: The battery health tool: versatile unit of convenient size and ease of use.
Reviewed in Canada on May 22, 2018
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Maya BeWell
5.0 out of 5 stars Good for environment, good enough for me: The battery health tool: versatile unit of convenient size and ease of use.
Reviewed in Canada on May 22, 2018
Update: using for 6 weeks: takes 4.5 hrs to charge duracell AA(ni- mh, 1.5V (@500 mah).
Rechargeable batteries- contribute towards a smaller climate footprint, yet lose their capacity to hold charge overtime. This unit will ‘clean them up’ ( discharge) and then charge them- increasing their service life. Dual use :pic 4- Battery and phone charger ( 1A usb slot). 4 vs 5 star- as the manual was diff. to understand, (but lots of details, and I am a novice at this.). Charges 4 items, and 4 types of batteries. pic 1 Each battery has its specific display, to monitor its charging progress. display screen is huge- backlit to see at night / low light ( it turns on, and tuns off if no button is pressed)- see video.
MY USE: Need a lot of batteries got this for mouse/keypad, clock, flashlight batteries, ranging high drain (gaming keyboard) to low drain (flashlight). This unit customizes my charging needs (charging /discharging current: how fast the battery is charging), recharges newer or much used battery (battery slow because of inactivity), a discharge mode to erase battery memory, and shows battery energy released, after discharge and not just charged inputted via charge. Uses optimal charge time / as per battery specs. ( does not fast charge-to overheat them).
TIPS
- med sized unit, best for travelling, but multi charger ( charges phone+batteries)
- Needs 2 hands operation to accurately adjust the springs to align battery contacts in bay, see video for inserting batteries correctly. or pic 3
- springs are med tight, good and bad- will not lose tension- but best to fit in the battery with 2 hands. see video part 2
- bring batteries to room temp- before charging ( if stored in fridge) , some say to freeze in ziplock ( no personal experience with this)
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6 people found this helpful
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Nounourse
4.0 out of 5 stars Good for the price
Reviewed in Canada on June 21, 2022
Matthew
5.0 out of 5 stars Great Charger!
Reviewed in Canada on August 1, 2019
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Matthew
5.0 out of 5 stars Great Charger!
Reviewed in Canada on August 1, 2019
This charger works as intended. They screen is easy to read and has backlighting. The user interface is also easy to use, and offers 300,500,700 and 1000mA charging, and also offers a charge\discharge feature (The discharge is at a constant 500mA). The info is accurate and easy to find thru the user interface.

The only cons this thing has is that it uses a wall wart instead of an internal power supply and that it can only deliver max 1A (1000mA) charging per slot.

Attached is a couple pictures of the charger on Test/Charge mode. The info shown is the actual capacity of the batteries.
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One person found this helpful
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Don Thompson
5.0 out of 5 stars It works great.
Reviewed in Canada on August 5, 2022