These are great lasting batteries that outlast any other battery I have. I will be buying more and tossing my other batteries away.
Key Features
- High-capacity 3500mAh cell optimized for long runtime
- Protected button top design with integrated PCB
- 5A continuous output limited by PCB
- Enhanced safety protection against overcharge, over-discharge, and short circuit
- Extended length compared to standard flat top 18650 cells
Note: This is a button top protected 18650 battery which is longer than a standard flat top unprotected 18650 battery.
Note: Do not remove the clear protective wrap — doing so voids the warranty and may compromise the cell's protection circuit.
Overview
The Samsung INR18650-35E protected button top battery is engineered for applications requiring extended runtime and enhanced safety. Featuring a 3500mAh nominal capacity and an integrated protection circuit board (PCB), this cell provides controlled output and safeguards against electrical faults. Its button top configuration and added protection components result in a longer overall length than standard flat top 18650 batteries.
Applications / Uses
- Portable power packs
- High-efficiency lighting systems
- Electronics requiring protected lithium-ion cells
- Battery-powered equipment with button top compatibility
- Low-to-moderate current energy storage applications
SPECIFICATIONS
| Manufacturer | Samsung SDI |
| Model | INR18650-35E |
| Size | 18650 |
| Positive Terminal | Button Top |
| Nominal Capacity | 3500mAh |
| Continuous Discharge Rating | 5A (PCB Limit) / 8A (Cell Rating) |
| Nominal Voltage | 3.6V |
| Maximum Voltage | 4.2V |
| Discharge Cut-Off Voltage | 2.65V |
| Protected | Yes (PCB) |
| Rechargeable | Yes |
| Approx. Dimensions | 18.6mm × 69.8mm |
| Approx. Weight | 50.53g |
| Data Specification Sheet | Samsung 35E Datasheet |
⚠ Important Safety Warnings
While this battery is equipped with built-in protection circuitry to help prevent overcharging, over-discharging, and short circuits, improper handling or misuse can still result in FIRE, EXPLOSION, or THERMAL RUNAWAY, causing personal injury or property damage. Users must read and follow all safety guidelines before purchase and use. Click here to review the full safety guidelines.
- Intended Use: This battery is designed for use in flashlights, headlamps, and similar devices that require a button top configuration. Ensure compatibility with your device before use.
- Protection Circuit Limitations: While the protection circuit provides additional safety, it cannot prevent damage caused by misuse, including exposure to liquids, extreme heat, or physical damage.
- Storage & Transport: Always store batteries in protective cases to prevent accidental contact with metal objects (e.g., keys, coins, tools) that can cause a short circuit. Do not store loose batteries in pockets, bags, or other uncontrolled environments.
- Inspection: Do not use if the battery is dented, leaking, bulging, or if the outer wrapper or button top is damaged.
- Charging: Use a smart charger specifically designed for button top protected batteries. Do not exceed the battery's voltage and current specifications. Never leave the battery unattended while charging.
-
Prohibited Activities:
- Do not expose the battery to water, fire, or high heat.
- Do not modify, puncture, crush, or attempt to disassemble the battery.
- Do not use the battery if it becomes unusually hot during use or charging.
- 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: 4.2 / 5 from 41 reviews.
Works as advertised and arrived quickly!
It seemed like the correct battery. All the numbers matched and pictures looked the same but this battery has a lead that goes from positive to negative which makes it longer than the battery I’m replacing so it would not work. The plastic unwrapped on one causing the conversions to come apart which seemed dangerous so I dropped them at the Home Depot battery return. Disappointed as I still don’t have the battery I need.
I had purchased generic 18650 batteries at the jungle store but they make the flashlight flicker which I hate. Purchased these, charged them and after installing them in the flashlight, I could swear that they are brighter than before with absolutely no flickering! Lesson learned! Buy recognizable brand batteries!
Working great in my UV Curing flashlight
Perfect shopping experience and great products.
looks good. have not tested them yet.
The shipping time was good and the product was what I expected. It's good to have a source for quality batteries.
Recieved my batteries quickly
The size was wrong, and mislabeled on your website. I will NEVER use your website again.
Works as expected.
good batteries, dont buy the amazon batteries, thier rating is wrong these work well and geeat power density
Work great so far!
Extremely rigid customer service.
Correct size and works great
Batteries were too long for my doorbell camera, and I am stuck with almost 40.00 worth of batteries I can't use!!! NOT RETURNABLE.!!!!
It does not fit the unit
Was told by RIX that this was a substitute battery for the K3 because of their recall. However this battery is too big to close the battery compartment door. So I have two useless batteries now until I take them to the recycle center.
Fast shipping, charging the batteries went smooth. Getting ready to put them to try them out this evening. Seems like a good product so far. 🤔🤞
Haven't used them
Use these with Ring Solar pathlights, and they fit perfectly.
The battery operates fine however I had to remove the plastic wrapping around the battery and the black piece on the negative side of the battery. The battery was too long and too thick for my flashlight. First time in 15 years seeing this problem. Always had good luck with the Japanese batteries like Panasonic. Will have to see about longevity.
Good quality
Works well
Battery charge right now in my flashlight.
Works perfectly for my Mesh Radio. Much longer run time than my other batteries.
they don't fit my headlamp, so it was a wasted purchase. The plastic coating on them makes them just a fraction of a mm too wide.
They work
Purchased 4 of these cells for the Nitecore TM39. Seem pretty good so far? IR on 3 of the 4 have measured between 100-almost 200 mOhms .Only one measures below 100. They’re wrapped well! Hope they hold up well..?
Purchased 4 of these cells for the Nitecore TM39. Seem pretty good so far? IR on 3 of the 4 have measured between 100-almost 200 mOhms .Only one measures below 100. They�re wrapped well! Hope they hold up well..?
They are great batteries, I have had no issues. I love that they come in a plastic carrying case!
High quality cells, exactly what I needed. Packaging was above and beyond. Highly recommended
I got this to replace an OEM battery on a new emergency radio. This battery completely outperformed the original one.
I recently ordered the Samsung 18650 rechargeable battery. I received it promptly in the mail. It was packaged well. The battery is very strong and it was fully charged in a good amount of time. I was quite satisfied with this product.
Quality products, fast shipping, good price. Ships from domestic company which is a big bonus for regulations.
Works good, but needs better labeling. These batteries are being used like AA batteries, but have insufficient labeling. This is a problem shared by most of these types of batteries, some are better than others, but this one is mediocre with the labeling. Everything else about it is great. And I will buy more.
The batteries arrived promptly and were of a much higher quality than the ones that originally came with my dive light. Highly recommended.
One of the few sources online for this battery. All worked fine. Deliver was on time. Thanks
I used 4 off these in a high powered scuba light(18000 lumens) and they out performed all previous batteries.
Purchased these after being hugely disappointed by some cheap batteries I purchased. I tested several and they were very close to the rated capacity. These are a very tight fit in one flashlight I have, but they are fine in all my others. Very happy with my purchase.