Charger charged one set of batteries went dead tried again a few days later worked for one cycle and stopped again. It only works every couple of days. Very disappointing
Note: The Nitecore i4 charger does not display LED lights until a battery is inserted.
The Nitecore i4 Battery Charger is a powerhouse in the realm of battery management, offering the ability to charge up to four batteries simultaneously with precision and speed. Designed to accommodate a vast array of battery types and sizes, from lithium-ion to NiMH, the i4 charger is the perfect solution for users ranging from professional technicians to everyday gadget enthusiasts. With advanced charging modes and robust safety features, the i4 ensures that your batteries are charged efficiently and safely, enhancing their longevity and performance.
- Multi-Battery Compatibility: Capable of charging a wide variety of battery types including Li-ion, IMR, and NiMH batteries, making it exceptionally versatile.
- Adjustable Charging Speeds: Features four selectable charging speeds (0.375A x 4, 0.5A x 2, 0.75A x 2, or 1.5A x 1), allowing for optimal charging efficiency based on your needs.
- Intelligent Charging: Automatically detects battery type and status, adjusting the charging voltage and mode to prevent overcharging and increase battery life.
- Safety Features: Equipped with overcharge protection, short circuit protection, and reverse polarity protection to ensure safe charging at all times.
- Convenient LED Indicators: Each channel has an LED that displays the current charging status, making it easy to monitor the progress of each battery.
Compatible with:3.6V/3.7V Lithium Ion IMR Batteries – 10340, 10350, 10440, 10500, 12340, 12500, 12650, 13450, 13500, 13650, 14350, 14430, 14500, 14650, 16500, 16340, 16650, 17350, 17500, 17650, 17670, 18350, 18490, 18500, 18650, 18700, 20700, 21700, 22500, 22650, 25500, 26500, 26650
1.48V NiMh/NiCd batteries – AA, AAA, AAAA, C, D
Technical Info:
- Input – AC 100-240V, 50/60Hz, .35A (MAX), DC 12V 1A
- Output - 4.35V +/-1% | 4.2V +/-1% |3.7V +/-1% | 1.48V +/-1%
- Output current - 1.5A x 1 / 0.75A x 2 / 0.5A x 2 / 0.375A x 4
- Dimensions - 140mm × 94.8mm × 37mm
- Weight - 202g (without batteries and power cord)
- SIZE/TYPE COMPATIBILITY - ✔ 18650 ✔ 20700 ✔ 21700
What's in the box:
- Nitecore i4 battery charger
- Standard USA power plug
- User Manual
- Scratch-off validation serial number
⚠ Important Safety Warnings
Improper use of a battery charger can result in overcharging, short circuits, or damage to the battery, causing FIRE, EXPLOSION, or ELECTRICAL SHOCK. Users must follow all safety guidelines to ensure proper operation. Click here to review the full safety guidelines.
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Device Compatibility:
- Use the charger only for compatible battery types and sizes as specified by the charger manufacturer. Ensure the charger is appropriate for the battery chemistry, size, and protection status (e.g., unprotected or protected cells).
- Do not charge non-rechargeable batteries (e.g., alkaline or primary cells).
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Proper Use:
- Only charge batteries in a fireproof or non-flammable area. Avoid charging on beds, couches, or other flammable surfaces.
- Do not force a battery into the charger slot if it does not fit properly. This can damage the charger or battery and may result in unsafe charging conditions.
- Inspect batteries before charging: Do not charge if the battery casing, wrapper, or terminals are damaged, dented, leaking, or bulging.
- Never leave batteries unattended while charging. Monitor the charging process, and unplug the charger when charging is complete.
- Avoid exposing the charger to liquids, high heat, or direct sunlight.
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Inspection:
- Do not use the charger if the power cord, plug, or device is damaged.
- Inspect both the charger and the battery for any signs of damage before use.
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Storage & Handling:
- Keep the charger away from children and pets.
- When not in use, unplug the charger and store it in a cool, dry place.
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Prohibited Activities:
- Do not modify or disassemble the charger.
- Do not attempt to repair a damaged charger—replace it with a new one.
- Avoid using extension cords or adapters that exceed the manufacturer’s recommendations.
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Emergency Response:
- If the charger or battery emits smoke, sparks, or a burning smell, disconnect the power immediately and move the battery and charger to a safe area.
- In case of fire, use a Class D fire extinguisher or sand to extinguish the flames.
Disclaimer
IMR Batteries is not responsible for any damages, injuries, or claims arising from improper use, handling, or failure to follow these safety guidelines. Battery chargers must only be used with compatible battery types and operated in accordance with manufacturer instructions. It is the reseller's responsibility to ensure all safety warnings and product guidelines are effectively communicated to their customers. Users and resellers assume full responsibility for the safe handling, usage, and distribution of this product.
Customer Reviews
Overall rating: 4.6 / 5 from 154 reviews.
Does a good job. Only issue is that the more batteries you charge at one time, the longer it takes. Even my many years old i4 that still works behaves similarly. I got this new i4 to replace a different brand 2 bay charger that's always slow for my son.
Very dependable charger for the low cost.
Works.great!
good quality charger and like the ability to charge 4 batteries at once - even different size and rating. Does good with even protect LI-Ion batteries used in Flash lights. Good description on the website
good quality charger and like the ability to charge 4 batteries at once - even different size and rating. Does good with even protect LI-Ion batteries used in Flash lights. Good description on the website
Gets hot but works good. Every one Ive bought has lasted years of multiple full tray charges of 21700 and 18560 Batteries per day, day after day.
Has a lot of good features.
Simple and works well.
Have purchased two to date. Seems to charge fast and the LED status is easy to see the charge level. Great for the 21700 batteries, which is the primary reason for purchasing these.
It gets very hot charging two or more 18650 batteries. And the voltage settings are kink of clunky.
So far I'm very satisfied with this charger.
Quick charge when not charging all four dead batteries at once, I am pleased with my purchase
Great charger that is priced very affordably.
It works great, I just wish there was a little more space between each battery. Hen I’m charging 2 it’s fine, but when I charge 4 it’s difficult to get the batteries out of the charger!
Great charger, better quality than most I have owned. I did think it was going to have a digital number system to give more information but it's ok that it doesn't.
Runs VERY HOT!
Springs in battery slots are flimsy , slow charging , charges a battery at a time and instructions are vague .
Fast shipping and great product
Bought this for my wife. She outgrew her 2 bay charger and kept stealing slots on my 4bay. It’s a good charger at a good price. No digital screen thrills but who really needs that. Fast shipping as always from IMR.
I love this charger, major upgrade from my old 2 bay charger
Great product
I've had a Nitecore UM20 2 battery charger for well over 8 years and it's still working great. I just needed a little more charging capacity and a regular power cord. The i4 fits that bill. It does not have LED bar graph indicators, but it does have four green and red LED lights that give you the charge indicated. Same Nitecore quality. First-rate build quality and a warranty that I have never had to use. One of life's little mindless pleasures, put your cells on the charger, on a cool flat surface, come back a while later, fully charged-up cells ready to go.
The charger works great as far as charging but the fit for 21700 batteries is not good.it is very tight and to the point of damaging the wrap on my batteries. Works great for 18650 batteries
Awesome charger I’m sure it’s advanced enough to be one of the best if not the best so far so good..Imr is a awesome legit site with fast shipping will be back soon!
No problems. Works fine. Shipment was quick.
Very nice. Does everything described
The charger is alright only thing is that charging my Gollissi 21700 batteries is a pain coz it scratches the wrap on top if you’re nit careful taking it out... But no problems with Samsung 30 Ts... Very fast shipping so I love iMR!!! Thank You!!!
Oh hey yeah it's great
Oh hey yeah it's great
Charger works great but its tearing the battery wraps. To tight for them. 18650, 20700 work perfectly.
I had a 2 channel charger that didn’t fit my 20700 or 21700 batteries. This work great and charges fairly quickly
Happy, does what it should and price was not high or low witch is fine
I’ve owned 5 chargers all were nitecore all worked as they should, I got this one because none of the old ones would fit 20700 or 21700 that was the only reason and I’m very happy with it. It took around a month to get it after I ordered and it had nothing to do with IMR Batteries, it was USPS that delivered the package across the street! When a package is scanned before mailman puts in mailbox that scan also records the GPS location so they can look back and see if it was taken to the right location and that got me a refund! FedEx does not do this!!! So remember that. Oh by the way people across street that got my package lied and would not give it back, good neighbors right? Not!
Bought some new 20700 Batts but they didn't fit my charger. Picked this up for a great price. Batteries fit, barely, and charge fine. Charging rate is a bit on the slow side, especially charging four batteries at once. Overall great charger for the price
My only gripe about this charger is how tightly my 21700 batteries fit in it. I'm a little concerned about the wraps, but if I pay close attention when loading and unloading them, I'll be ok. Otherwise, very nice indeed.
I had one before and the power cord died, I like these chargers a lot, I need buy another power cord for my older one!
Before I bought this, I was using my buddies 6-port charger, and it took all the night to charge. With this one, if I wake up with low batteries for example, I can charge them and have them ready before I go to work
My seconded one, lost my first one to unforseen circumstances. Looked around couldn't find one better for the price imo. And in case I need it for 21/20700's.
love this charger