Used the batteries for an off grid communications repeater. Holding strong in the triple digits temp. Quick turnaround from order to received. Will order again in the future.
Key Features
- High 3500mAh capacity for extended runtime
- Reliable 10A continuous output for steady performance
- Efficient energy delivery with stable voltage output
- Designed for durability and long service life
- Trusted LG Chem quality and consistency
Overview
The LG MJ1 18650 battery is built for applications where long-lasting power and reliability matter most. Featuring a high 3500mAh capacity and a stable 10A continuous discharge rating, this cell delivers dependable energy output, making it an excellent choice for systems that demand efficiency and extended operating time.
Applications / Uses
- Portable power banks
- Energy storage systems
- High-efficiency electronic devices
- Backup and reserve power solutions
- Professional and consumer electronics
SPECIFICATIONS
| Manufacturer | LG Chem |
| Model | INR18650 MJ1 |
| Size | 18650 |
| Positive Terminal | Flat Top |
| Nominal Capacity | 3500mAh |
| Continuous Discharge Rating | 10A |
| Nominal Voltage | 3.7V |
| Maximum Voltage | 4.2V |
| Protected | No |
| Rechargeable | Yes |
| Approx. Dimensions | 18.30mm × 65.10mm |
| Approx. Weight | 49g |
| Data Specification Sheet | LG MJ1 Datasheet |
⚠ Important Safety Warnings
Improper handling or misuse of this lithium-ion battery can result in FIRE, EXPLOSION, or THERMAL RUNAWAY, causing personal injury, property damage, or death. Users must read and follow all safety guidelines before purchase and use. Click here to review the full safety guidelines.
- Critical Warning: Never carry loose batteries in your pocket, purse, or bag. Loose batteries can come into contact with metal objects like keys or coins, causing a short circuit, which may result in severe burns, fire, or explosion. Always store or transport batteries in a protective case or box.
- Intended Use: This battery is designed for integration into protected battery packs with a Battery Management System (BMS) or Protection Circuit Board (PCB). It is not intended for standalone use or use in devices such as e-cigarettes or vaporizers.
-
What is Thermal Runaway?
- A dangerous chain reaction where heat generated by a failing battery causes it to overheat further, potentially leading to fire or explosion.
- Causes: Overcharging, short circuits, physical damage, or exposure to high temperatures.
- Prevention: Use a smart charger, avoid physical damage, and store batteries in a cool, dry place.
- Storage & Transport: Always store batteries in protective cases or boxes to prevent accidental contact with metal objects. Never store loose batteries in pockets, purses, bags, or near conductive materials.
- Inspection: Do not use if the PVC wrapper, terminal insulator, or casing is damaged, dented, leaking, or bulging. These are signs of internal damage or instability, and continued use could result in failure, fire, or explosion.
- Charging: Use a smart charger designed specifically for lithium-ion batteries and ensure that the charger's voltage matches the battery's specifications. Never overcharge, over-discharge, or leave unattended while charging.
- Prohibited Activities: Do not short circuit, modify, puncture, crush, expose to liquids, or solder directly onto the battery (spot weld only).
- Emergency Response: If a cell shows signs of thermal runaway (smoke, swelling, hissing, or heat), stop use immediately and, if it can be done safely, move it to a non-flammable surface (e.g., concrete or sand) away from combustibles. Lithium-ion cell fires are Class B fires — use an ABC/dry-chemical extinguisher, or douse with large amounts of water to cool the cell and prevent spread. Do not rely on a small spray; thorough cooling is required, and cells can reignite from residual heat, so monitor the area afterward. (Class D extinguishers are for lithium-metal batteries, not lithium-ion.) For any fire beyond a single small cell, evacuate and call emergency services.
Disclaimer
IMR Batteries is not responsible for any damages, injuries, or claims arising from improper use, handling, or failure to follow these safety guidelines. Lithium-ion batteries require strict adherence to all safety protocols.
It is the reseller's responsibility to ensure all product warnings and safety guidelines are effectively communicated to their customers. Some cells are sold in bulk packaging and are not individually packaged. Resellers must provide appropriate packaging for each individual cell sold and must not distribute cells loose, unprotected, or without a proper storage box or case.
Product compatibility is the sole responsibility of the customer. IMR Batteries does not guarantee compatibility with any specific device or application. We are not responsible for the design, assembly, performance, or safety of any battery pack constructed using our cells. It is the customer’s responsibility to ensure proper cell matching, protection circuitry, configuration, and safe construction practices. Users and resellers assume full responsibility for the safe handling, usage, and distribution of this product.
Customer Reviews
Overall rating: 4.8 / 5 from 67 reviews.
The 2 LG 18650 MJ1 battery's were very good. I would buy from IMR again !
More good batteries tested to be good as described
This battery is last super long. I bought these battery for replacing my old Medicool Pro Power 35k portable’s battery. After, I replaced them with these new battery, the tool work all days long and lasting in 10 days without recharge if compare to the previous battery from the tool when I bought it brand new , they last almost 4 days longer. It’s impressing, I will buy these battery again for backup and for another tool when it’s need to replace. Everything were great and I am happy when I bought the battery from IMRbattery. Thank you again .
So far these batteries are working great. They are powerful AND last a verrrry long time - perfect for a tradesman/craftsman/artisan like me.
Fast shipping, helpful service and great prices! What’s not to love?
Ordered 12 ot these hold a charge as all top tier batteries should verry pleased
Flashlight works better than ever.
Good product
Love the fast shipping for the MJ1 batteries I will be a repeat customer.
Great all around battery for lower discharge current rates. Would purchase again
Needed a certain battery to replace in my battery pack for a 80v green works. Works great thanks
Idk if it's my device or the batteries, but they are only lasting about a week or so in my "ring" type of camera. The camera is very low traffic and only recording 1 or 2 short events per day. I have several other battery camera devices that last several months before needing recharging. The batteries do work, and are slightly higher mAh than the original batteries, but I guess I was expecting longer times between recharges.
So far so good.
Bought 2 of them, tested and they both are 3450-3490 mAh
Why do you include plastic cases and paper boxes used to store the batteries that you ship. I'm sure there's a cost for these extra items. In the future, since I build battery packs as soon as I recieve the batteries, is it possible to order the batteries at a lesser cost without the cases and paper box coverings?
Hold a charge really well. Have charged multiple times with no issues.
I bought 6 for use in a long range rc plane. Initially I thought the price ($2.99 per cell on clearance) was too good to be true so I did a bunch of research because I didn't want to get ripped off but everyone on reddit said Imrbatteries was legit so I bought some, not knowing what to expect. It took a week to arrive in Oregon from Texas and I was impressed with the packaging. Battery containers in boxes and some imr wraps and a sticker. The cells looked good and came at ~3.54v per cell. I did some rough capacity testing and came out with about 3300mah. Not the full rated capacity but I assume they're on clearance because they've been sitting in a warehouse for a while and have degraded slightly. I will do more testing but so far, these are excellent value!
Bateries are good and everything the shop said it is true. 20A, 3500mAh
Works as expected for vaporizer.
Bateries are good and everything the shop said it is true. 20A, 3500mAh
This is an excellent battery option for eBikes! Performance is stellar.
Love these cells. Outstanding capacity and plenty of drain for my needs!
First, IMRBaterries is one of those rare companies that exceeded my expectations. The batteries arrived in a small thick cardboard box with intermal dividers. The box was wrapped in multiple layes of packing paper. The 24 batteries all tested at 3.567 which is an excellent storage voltage. None had any sign of use or damage. I charged them at 0.5 Amps but also tested each by charging at 1.0 Amps for a few minutes. No heat or other problems occurred. All 24 batteries charged to the max limit of my charger = 4.160. I assembled them into a 4S2P configuration and they produced 16.59 Volts as a unit. I do highly recommend this company and the LG 3500mAh 10A batteries.
Love em
Tried and true LG quality. My headlamp loves them!
I bought 12 of these. Could tell they were brand new because all metal ends were unmarked. Charged up two, put them (in series) on ~1/2A resistive load, and measured the Ah at 3.42 when discharged to 2.6V ea, as low as I wanted to go. Couldn't be happier!
Game changer on my fenix headlamp. Added 50% to the run time..
Good battery wish it had the amp rating and capacity listed on the battery
Great battery for 75W single 18650 mod. Mostly used under 20W and this battery holds it's charge most the day under moderate usage.
IBID. Excellent service
I use these for my flashlight. However i tried them in my vape and they have enough amperage to fire at least at 80w. Last much lknger than other batteries. A+
Great
perfect buying experience.
My wife vapes at 36 watts and they hold up great!! The last her a little over 2 days! The only gripe I have is it took 2 days before the shipped from IMR but once the shipped got it in 3 days to Ga. regular usps!!
My wife vapes at 36 watts and they hold up great!! The last her a little over 2 days! The only gripe I have is it took 2 days before the shipped from IMR but once the shipped got it in 3 days to Ga. regular usps!!
I found these batteries to test out well against there rated capacity with a IMAX B6 charger.
I found these batteries to test out well against there rated capacity with a IMAX B6 charger.
Everything arrived on time and batteries were what I hoping they would be. Running some tests on them and they're coming out where I'd expect them to be.
Everything arrived on time and batteries were what I hoping they would be. Running some tests on them and they're coming out where I'd expect them to be.