D4 - Battery charger Nitecore - Free user manual and instructions

Product Type	Battery Charger
Brand	Nitecore
Model	D4 (D4EU)
Compatible Battery Chemistries	Li-ion, IMR, LiFePO4 (manual), Ni-MH, Ni-Cd
Compatible Battery Sizes	26650, 22650, 18650, 17670, 18490, 17500, 18350, 16340(RCR123), 14500, 10440; AA, AAA, AAAA, C
Number of Charging Slots	4 (independent)
Input	AC 100-240V 50/60Hz 0.35A (max), DC 12V 1A
Output Voltage	4.2V ±1% / 3.7V ±1% / 1.48V ±1%
Output Current	375mA × 4 (3-4 batteries) / 750mA × 2 (1-2 batteries)
Display	LCD showing voltage, current, time, and charging progress
Charging Modes	CC, CV, dv/dt (automatic selection); manual LiFePO4 mode; low current mode for small batteries
Safety Features	Reverse polarity protection, over-charge prevention, temperature monitoring, overtime cutoff (20h), short-circuit protection
Construction Material	ABS (fire retardant / flame resistant)
Dimensions	5.63" x 3.90" x 1.42" (143mm x 99mm x 36mm)
Weight	8.43 oz (235g) without batteries and cord
Certifications	RoHS, CE, FCC; insured by Ping An Insurance
Warranty	12 months from date of purchase (15 days DOA exchange)
Special Functions	Battery activation for depleted protected Li-ion, nocturnal charging mode, automatic eco mode
Accessories Included	AC power cord, car charging adapter

Frequently Asked Questions - D4 Nitecore

What types of batteries are compatible with the Nitecore D4?

The D4 supports Li-ion, IMR, LiFePO4 (manual selection), Ni-MH, and Ni-Cd rechargeable batteries. Compatible sizes include 26650, 22650, 18650, 17670, 18490, 17500, 18350, 16340(RCR123), 14500, 10440, as well as AA, AAA, AAAA, and C cells.

Can I charge different battery types simultaneously?

Yes, each of the four slots operates independently, so you can charge batteries of different chemistries and voltages at the same time.

How do I charge LiFePO4 batteries?

After inserting a LiFePO4 battery and the test completes, press and hold the MODE button for more than 2 seconds. "LiFePO4" will appear on the LCD. To exit, press and hold MODE again or remove/reinsert the battery.

What does the LCD display show?

The LCD shows battery voltage, charging current, elapsed charging time, and charging progress via illuminated bars. Press the MODE button to cycle through parameters. The SLOT button selects which slot's data is shown.

What is low current mode and when should I use it?

Low current mode ("LOW" on display) reduces charging current to extend battery life for small capacity batteries (under 750mAh like 10440 or 16340). To activate, select the slot and press MODE for more than 1 second.

How do I activate nocturnal charging mode?

Press and hold the SLOT button for more than 1 second in any state to turn off the LCD backlight and LED indicators, ensuring dark operation. Press and hold again to exit.

What does 'Err' on the display mean?

'Err' indicates a damaged or non-rechargeable battery, reverse polarity, or a battery that cannot be activated. Remove the battery immediately and check polarity or replace the battery.

Is it safe to leave the charger unattended?

The manual advises not to leave the charger unattended when connected to power. It features overcharge protection, temperature monitoring, and an overtime safety cutoff after 20 hours, but supervision is recommended.

Can the D4 charge completely dead (0V) batteries?

It can activate depleted protected Li-ion batteries, but Nitecore does not recommend charging 0V unprotected Li-ion batteries as it may cause fire or explosion. Such batteries will show 'Err'.

How do I register for warranty service?

Find the verification code on the package, go to http://charger.nitecore.com/validation, enter the code and your personal details. Nitecore will email you a warranty confirmation. Keep this email as proof.

USER MANUAL D4 Nitecore

The New Benchmark in Intelligent Chargers

Digicharger D4(D4EU)

User Manual

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Black NITECORE battery pack with four cylindrical pins, no visible text or symbols on the main body.

(English) IMPORTANT NOTICE CONCERNING WARRANTY SERVICE

Thank you for purchasing! Before using this charger, please find your verification code on the package box, and go to http://charger.nitecore.com/validation (or scan the QR code beside the verification code to visit on your mobile phone). Type in your verification code and personal information as required, and submit the page. After verification, Nitecore will send you a warranty service email. This email and your registration email address are essential to your possible warranty application. Before you complete the warranty service registration, you cannot enjoy our warranty service for your purchase.

(English) Digicharger D4(D4EU) User Manual

The Nitcore D4(D4EU) is a universal smart charger compatible with almost all cylindrical rechargeable batteries, thus eliminating the need to own several chargers. The D4(D4EU) automatically detects Li-ion, Ni-MiH and Ni-Cl₂ batteries, and through manual selection is also capable of charging LifeXOI batteries. Intelligent charging circuit selects the optimal charging mode (CC, CV and dv/dt) for a given battery and each of the D4(D4EU)'s four microcomputer-controlled charging slots then monitors and charges the battery independently. Furthermore, an integrated digital LCD screen clearly displays charging progress, voltage, current and time while intelligent electric power function terminates current when charging is complete. The Nitcore D4(D4EU): The world's most advanced fully-automatic digital charger. It's as simple as Insort, detect and charge.

Features

• Capable of charging 4 batteries simultaneously
  • Each of the four battery slots monitors and charges independently
• Compatible with and Identifies Li-Ion (26650, 22650, 18650, 17670, 18490, 17500, 18350, 16340(RCR123), 14500, 10440). Ni-MH and Ni-Cd (AA, AAA, AAAA, C) rechargeable batteries
  • Optimized charging design for IMR batteries
• Integrated LCD panel clearly displays charging parameters and progress
• Two conveniently located side buttons allow easy selection of specific battery types and charging parameters
• Intelligent circuitry detects the battery type and status before entering automatic charge mode (CC, CV, dv/dt)
• Automatically detects battery power status and selects the appropriate voltage and charge mode (with the exception of LiFePO4 batteries which require manual selection)
  • Compatible with UFPD4 batteries
• Compatible with small capacity batteries
• Compatible with small capacity batteries
• Automatically stops charging when complete
• Automatically stops charging which complete
• Features over-charge presentation to project batteries
• Features over-charge prevention to product batteries
• Features temperature monitoring to prevent overheating
  • Made from durable ABS (fire retardant / flame resistant)
  • Features reverse polarity protection
• Designed for optimal heat dissipation
  • Certified by RoHS, CE, FCC and
  • Insured worldwide by Ping An Insurance (Group) Company of China, Ltd.

Specifications

Input: AC 100-240V 50/60Hz 0.35A(MAX). DC 12V 1A

Output voltage: 4.2V ±1% / 3.7V ±1% / 1.48V ±1%

Output current: 375mA × 4 / 750mA × 2

Compatible with:

Li-ion / JMR / LiFePO4: 26650, 22650, 18650, 17670, 18490, 17500, 18350, 16340(RCR123), 14500, 10440

N-MH / NH-Cr: 20, 200, 0000. C

Dimensions: 5.63" x 3.90" x 1.42" (143mm x 99mm x 36mm)

Dimensionist: 5163 W 5150 W 2142 (215mm+95mm+50mm) Weight: 8.43oz (235g) (without batteries and power cord).

Operating instructions

1. Plug one end of the power cord or car charging adapter into the D4(D4EU) charger. Plug the other end of the cord into an applicable outlet. The LCD display and all battery indicator bars will illuminate as the charger runs a quick self-test. When testing is complete, the name of the product will appear on the screen, the bars will dim and the charger will enter into stand-by mode. If no batteries are detected within 1 minute, the charger will automatically enter Eco Mode (the LCD backlight will turn off). When a battery is installed while in Eco Mode, simply press any button to activate the LCD display.
2. The D4(D4EU) features four charging slots, each of which charges and monitors a battery independently. Rechargeable batteries of differing chemistries and voltages may be charged simultaneously using either 1, 2, 3 or all 4 of the charging slots. When inserting a battery, ensure the positive and negative ends correspond with the positive (+) and negative (-) symbols on the charger. Incorrect installation will result in failure to initiate the charging process.
   Note: The D4(D4EU) is capable of charging 3.7v Li-ion rechargeable cells, 1.2v, NI-MH/NI-Cd rechargeable batteries and 3.2v LiFePO4 batteries. See above for description of battery sizes.
3. When a battery is first inserted the D4(D4EU) will run a short test causing the battery indicators bars to illuminate in sequence from the bottom to the top. When the test is complete, the D4(D4EU) will enter into charging mode. If any unusual circumstances have been detected, e.g., a backward battery Installation, the battery Indicator bars will blink rapidly and "Em" will be presented on the screen to urge an immediate removal of the battery.
4. While in charging mode, the battery indicator bars will blink rhythmically to indicate the on-going charging process. The battery's power status and charging progress is indicated by the number of bars that illuminate steadily. The LCD display will also display battery voltage, followed by charging current and elapsed charging time in sequence. Pressing the side "MOOE" button will cycle through these charging parameters. To view the charging progress of a different charging slot press the side "SLOT" button to select a dosed slot. When charging is complete, all five battery indicator bars will illuminate steadily and "Cng.Finish" will appear on the LCD display.
   Note: When the D4(D4EU) is charging three or four batteries, charging current will be set to 375mA. Alternatively, when charging other one or two batteries, charging current will be set to 750mA.

Charging LiFePO4 batteries

To charge LifePO4 batteries, simply press and hold the side "MODE" button for more than 2 seconds right after the battery test completes and "LifePO4" will appear on the LCD display to indicate the activation of LifePO4 charging mode. To exit LifePO4 charging mode, simply press and hold the side "MODE" for more than 2 seconds once again, or remove and reinstall the battery..

Charging Small Capacity Batteries

When charging batteries with a capacity lower than 750mAh (e.g. AM, 10440 and 16340 batteries), a low charging current is recommended to help extend battery life. To select a low charging current, while in regular charging mode, simply press the side "SLOT" button to select a desired battery slot and then press and hold the side "MODE" button for more than 1 second until "LOW" is displayed on the LCD display indicating activation of low current charging mode. To exit, simply press and hold the side "MODE" button for more than 1 second once again or remove and reinstall the battery.

Nocturnal Charging Mode

When charging a battery overnight, nocturnal charging mode is recommended. Simply press and hold the side "SLOT" button for more than 1 second in any state until the LCD backlight turns off thus activating nocturnal charging mode. This feature ensures a peaceful night's sleep without being disturbed by the DH(04EU)'s LCD backlight and blinking LEDs. To exit nocturnal mode and turn the backlight on again, press and hold the side "SLOT" button for more than 1 second again.

Battery Activation

The D4(D4EU) is capable of activating depleted Li-ion batteries with protective circuit. After battery installation, D4(D4EU) will test and activate the battery before charging. When a battery is detected as damaged, the LCD displays Err, and D4(D4EU) terminates its charging. Such damaged battery cannot be activated by D4(D4EU). NOTE: Nitocore does not recommend charging 0V (depleted) unprotected Li-ion batteries with D4(D4EU) and doing so can result in battery fire or explosion.

Overtime Prevention

The D4(D4EU) is equipped with an advanced 'overtime' safety function. The D4(D4EU) will individually monitor the elapsed charging time for each battery slot and if a particular slot exceeds 20 hours, the D4(D4EU) will automatically power off the slot and display full charging bars to indicate completion of the charging process. This feature reduces the risk caused by batteries of lesser quality.

Precautions

1. The charger is restricted to charging LH-on, IMR, LiFePO4, Ni-MH/Ni-Cd rechargeable batteries only. Never use the charger with other types of batteries as this could result in battery explosion, cracking or leaking, causing property damage and/or personal injury.
2. The safe operation temperature for the charger is between -10-40°C, and the safe storage temperature is -20-60°C.
3. Please charge batteries in accordance with the specifications on the back. Do not charge a battery pack with the charger.
4. Observe polarity diagrams located on the charger. Always place the battery cells with positive tip facing the top.
5. Never leave the charger unattended when it is connected to power. If any malfunction is found, terminate the process at once and refer to the operation manual.
6. The charger is designed for adults. Use of the charger by kids under age must be under supervision. Operation, using or cleaning of the charger may NOT be done by kids aged 8 years or younger.
7. Please make sure the correct program and settings are chosen and set. Incorrect program or setting may damage the charger or cause fire or explosion.
8. Never attempt to charge primary cells such as Alkaline, Zinc-Carbon, Lithium, CR123A, CR2, or any other unsupported chemistry due to risk of explosion and fire.
9. Do not charge a damaged IMR battery as doing so may lead to charger short-circuit or even explosion.
10. Never charge or discharge any battery having evidence of leakage, expansion/swelling, damaged outer wrapper or case, color-change or distortion.
11. Use the original adapter and cord for power supply. To reduce the risk of damage to the power cord, always pull by connector rather than the cord. Do not operate the charger if it appears damaged in any way.
12. DO NOT store or use the product in an environment where the temperature is extremely high / low or changes rapidly, or in a confined area with a high temperature.
13. Please operate the charger in a well-ventilated area. Do not operate or store it in damp area. Keep all the inflammable volatile substances away from operating area.
14. Avoid mechanical vibration or shock as these may cause damage to the device.
15. Do not short-circuit slots or other parts of the device. Do not allow metal wires or other conductive material into the charger.
16. Do not touch hot surfaces. The rechargeable batteries or the device may become hot at full load or high power charging/discharging.
17. Do not overcharge or over discharge batteries. Recharge drained batteries as soon as possible.
18. Remove all batteries and unplug the charging unit from the power source when not in use.
19. Opening, disassembling, modifying, tampering with the unit may invalidate its guarantee, check warranty terms.
20. Do not misuse in any way! Use for intended purpose and function only.

Disclaimer

This product is globally insured by Ping An Insurance (Group) Company of China, Ltd. Nilecore shall not be held responsible or liable for any loss, damage or claim of any kind incurred as a result of the failure to obey the Instructions provided in this user manual

Warranty Details

Our authorized dealers and distributors are responsible for warranty service. Should any problem covered under warranty occurs, customers can contact their dealers or distributors in regards to their warranty claims, as long as the product was purchased from an authorized dealer or distributor. NITECORE's Warranty is provided only for products purchased from an authorized source. This applies to all NITECORE products. Any DOA / defective product can be exchanged for a replacement through a local distributor/dealer in the 15 days of purchase. After 15 days, all defective / malfunctioning NITECORE® products can be repaired free of change for the period of 2 months (1 year from the date of purchase. Beyond 12 months (1 year), a limited or equivalent portion of the sales or sales of this product may be necessary, but not the cost of accessories or replacement parts. The warranty is nullified if the product(s) is/are:

1. broken down, reconstructed and/or modified by unauthorized parties

2. damaged from wrong operations (i.e. reverse polarity installation, installation of non-rechargeable batteries or failure to show the waves).

3. damaged by batteries lockers

For the latest information on NITECORE® products and services, please contact a local NITECORE® distributor or send an email to [e-mail].

※ All images, text and statements specified herein this user manual are for reference purpose only. Should any discrepancy occurs between this manual and information specified on www.nitecpe.com, information on our official website shall prevail. SYSMAX Innovations Co., Ltd. reserves the rights to Interpret and amend the content of this document at any time without prior notice.

Validation code and QR code on package can be verified on Nitecore website.

WARNING: THE D4(D4EU) IS RESTRICTED TO CHARGING Li-ion, IMR, 3.7V LiFePO4, Ni-MH

and Ni-Cd RECHARGABLE BATTERIES ONLY, NEVER USE THE D4(D4EU) FOR OTHER TYPE

OF BATTERIES AS THIS COULD RESULT IN BATTERY EXPLOSION, CRACKING OR LEAKAGE

CAUSING PROPERTY DAMAGE AND/OR PERSONAL INJURY

(Español) D4 (D4EU)

Manual de usuario

Dimensions: 143 mm × 99 mm × 36 mm

输出电压：4.2V±1%/3.7V±1%/1.48V±1%

Thanks for purchasing NITECORE!

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SYSMAX Innovations Co., Ltd.

TEL: [phone]

FAX: [phone]

E-mail: [e-mail]

Web: www.nitecore.com

Address: Rm 2601-06, Central Tower,

No.5 Xiancun Road, Tianhe District,

Guangzhou,510623, Guangdong, China

Manufacturer: SYSMAX Power Technology, LLC

Address: Unit 6355, 5/F, No. 1021 Gaopu Road,

Tianhe District, Guangzhou,

510653, Guangdong, China

Made in China

D2504422