Needed a battery for my dive light, and it works great
Key Features
- 3350mAh nominal capacity optimized for long runtime
- 4.87A maximum continuous discharge rating
- Heat Resistance Layer (HRL) for enhanced internal safety
- Button top design for compatibility with spring-contact devices
- Engineered for long cycle life and stable voltage delivery
Overview
The Panasonic NCR18650B is a high-capacity lithium-ion rechargeable cell designed for applications that prioritize extended runtime and dependable energy delivery. Featuring a 3350mAh nominal capacity and a conservative continuous discharge rating of 4.87A, this cell emphasizes longevity, safety, and efficiency through Panasonic’s advanced electrode and thermal protection technologies.
Applications / Uses
- Rechargeable battery pack assemblies
- Portable power storage systems
- Low to moderate current electronic devices
- Backup power solutions
- Energy-efficient battery builds
SPECIFICATIONS
| Manufacturer | Panasonic |
| Model | NCR18650B |
| Size | 18650 |
| Positive Terminal | Button Top |
| Nominal Capacity | 3350mAh (typical) |
| Continuous Discharge Rating | 4.87A Maximum Continuous |
| Nominal Voltage | 3.6V |
| Maximum Voltage | 4.2V |
| Discharge Cut-Off Voltage | 2.5V |
| Protected | No |
| Rechargeable | Yes |
| Approx. Dimensions | 18.63mm × 67.18mm |
| Approx. Weight | 47.5g |
| Data Specification Sheet | Panasonic NCR18650B 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.
- 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 for e-cigarettes, vaporizers, or similar devices.
-
Thermal Runaway: A chain reaction where heat from a failing battery
causes further overheating, potentially leading to fire or explosion.
- Causes: Overcharging, short circuits, physical damage, or exposure to high temperatures.
- Prevention: Use a smart charger, avoid damage, and store batteries in a cool, dry place.
- Storage & Transport: Always store batteries in protective cases 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. Continued use could result in failure, fire, or explosion.
- Charging: Use a smart charger specifically designed for lithium-ion batteries and ensure the charger's voltage matches the battery's specifications. Never overcharge, over-discharge, or leave unattended while charging.
-
Prohibited Activities:
- Do not expose the battery to extreme heat, fire, or liquids.
- Do not short circuit, puncture, crush, or modify the battery.
- Do not charge or discharge beyond the manufacturer’s voltage range.
- Do not dispose of in regular trash—always recycle at approved facilities.
- Emergency Response: If a cell shows signs of thermal runaway (e.g., 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 combustible materials. Lithium-ion cells burn as Class B fires — use an ABC / dry-chemical fire extinguisher, or douse with large amounts of water to cool the cell and prevent the fire from spreading. 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 intended for lithium-metal batteries, not lithium-ion.) For any fire beyond a single small cell, evacuate and call emergency services.
Disclaimer
18650Battery.com 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 safety warnings and product guidelines are effectively communicated to customers. Users and resellers assume full responsibility for the safe handling, usage, and distribution of this product.
Customer Reviews
Overall rating: 4.7 / 5 from 38 reviews.
Batteries work as expected.
Purchased for a fishing bred that powers an electric reel. Fit nicely and seems to work as needed. Have not used under any regular use load yet.
Need to purchase some more.
Batteries arrived quickly. Look to be of excellent quality. Shipped properly. I will order from them again.
Great cell as always!
They are supposed to be Panasonic but the label doesn't say it. And the performance of the batteries are under my expentance, they don't last that long.
They are awesome and last long than the other brand I have.
Really good quality
Amazing that Panasonic has different sizes (mm heights) for the same battery. Ordered the Panasonic 18650, same description, same color, same model number that came in my Tilt hydrometer, and the 4 that I ordered from Battery 18650 does not fit....ugh. Money well wasted!
Great batteries. Using them in our Night Owl cameras.
Good batteries
Longer than my usual 18650 battery and unusable tp me.
Excellent product.
I bought 5 NCR18650B button top batteries to replace 4 that were several years old. They were used in a flashlight that I use exclusively on my farm in East Tennessee. I bought an extra one just in case but so far, I haven't needed it. These batteries have worked flawlessly. I received good service from 18650 Battery with quick shipping and acknowledgement of my order. Their price, which I felt could have been better, was within reason.
The battery was a perfect replacement for what I needed
Arrived as expected, much heavier and taking longer to charge (and thus hopefully just as long to discharge) than the "9900mAh" batteries I purchased on Amazon.
Arrived as expected. Good batteries.
Japanese batteries are the best choice. I bought some of those Chinese 9900 batteries and they only last 15 minutes in my devise, these last 3 hours of continuous use in the same devise, they also are apx. 3 times heavier which means the Chinese are not what they say they are. Needless to say I threw the Chinese batteries in the garage
I have unfortunately purchased too many batteries that did not perform as advertised. This battery beat them all.
I use em everyday in a high power headlight. They last me 4-5 hours on high power no problem. Where Other Brands last like 20 min and die. Love these Panasonic ones !
I have not actually had the opportunity to test the batteries to see how long they last in my UV flashlight. However, the reason I rated them as Okay is that it took 12 hours for them charge from 12% on delivery to 100% on a high quality MIBOXER C4 charger. Maybe someone can shed som light on why it took 12 hours.
These li-ion batteries are some of the best in production. Worth going to the trouble to find.
Amazing batteries! Works well with the Adeept Rasptank kit! This was my first time buying batteries and I couldn't be more happy. Appreciate the extra battery sleeves too!
Awesome battery long life works perfect with the harbor freight flash light
Batteries are excellent. Customer service was top notch!
Good service. Good prices. Genuine products.
My review
Great battery. Fast shipping.
As soon as I received the batteries popped them into the charger and afterwards put them into my uv light that I use for drying a uv resin for fly tying. Battery strength helps cook(dry) the resin much faster than the standard AA batteries. The Panasonic batteries are holding their charge perfectly. Very pleased
Love em
Great experience altogether
I have a ..."flashlight" that only takes button top batteries and these work perfectly.
shipped quick and looked exactly like it should when it arrived
Legit batteries, quick shipping, box was packed with TLC; they also sent lots of free battery cases. Save yourself time and hassle and order legit batteries! I have a pile of fakes from the other marketplaces I wont mention.
Awesome quality tyvm..!
Fast ship and great prices!
Really good battery probably the best I have. I highly recommend buying this battery.