This battery has a very short life span.
Key Features
- Reliable 2500mAh capacity for everyday power needs
- 20A continuous output for demanding applications
- Trusted Samsung quality with consistent production standards
- Excellent balance of performance and value
- One of the most widely used 18650 cells worldwide
Overview
The Samsung 25R 18650 battery is known for its exceptional balance of power, consistency, and affordability. Delivering a solid 2500mAh capacity and a strong 20A continuous discharge rating, this cell is a dependable solution for applications that require steady output without sacrificing efficiency or reliability.
Applications / Uses
- Battery packs for power tools
- Portable energy storage systems
- High-drain electronics
- DIY and professional battery builds
- General-purpose power applications
SPECIFICATIONS
| Manufacturer | Samsung SDI |
| Model | INR18650-25R |
| Size | 18650 |
| Positive Terminal | Flat Top |
| Nominal Capacity | 2500mAh |
| Continuous Discharge Rating | 20A |
| Nominal Voltage | 3.6V |
| Maximum Voltage | 4.2V |
| Discharge Cut-Off Voltage | 2.5V |
| Protected | No |
| Rechargeable | Yes |
| Approx. Dimensions | 18.33mm × 64.85mm |
| Approx. Weight | 43.04g |
| Associated Names | 25R5, 25R6, 25R M, 25R8 |
| Data Specification Sheet | Samsung 25R 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.
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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 1309 reviews.
I changed the batteries in my Worx hedge trimmer I got from goodwill. Everything when fantastic. Thank you for the great product.
Im a big fan of the Samsung 25R 18650 2500mAh 20A Battery. I have used this particular battery type for over 10 years now. It is one of the most consistent batteries that has a decent size milliamp rating. I use these as Cingular configured 18650 vape mods. Very good high drain options in my opinion
The batteries worked great!! I used them as replacement cells for a 1.5 Ah M18 and a 2 Ah Dewalt battery. I especially enjoyed the complimentary sticker that was sent, I love it when companies do that.
I charged them with a battery shield which has both 5v and 3.3v power supplies for small projects. You can charge it with a USB port.
The long trusted 25r... Always available and always reliable. 10/10 would recommend! IMR delivers is spades...
IMR made things right. I built 2 Makita 18v battery packs and saved money with this build. I will be building more packs using IMR Batteries!
There great. Ordering and shipping was fast and easy. The batteries were double boxed and with bubble wrap. And came with plastic battery storage trays. Looking forward to future business with them
Exactly what I needed for intaking this project
Great batteries, fast shipping addressed my concern with package.
Awesome products tested true
14s 3p skateboard
Slow at charging and don't have the Samsung labeling but they work as intended,
Excellent product, I've been using these Samsung batteries from IMR for 10+ years, always fast shipping and great prices...
I have been using these same Samsung batteries for at least ten years now. They are very durable and I depend on them to last a long time and they do. Shipping is the best and can’t say anything about Customer Service because I’ve never needed them. That’s a good thing. Love love love it.
Great price, fast shipping , arrived just as described.
Batteries arrived quickly much appreciated and seems they are doing thier job well thanks!
Great batteries. Perfect condition. Capacity is as advertised.
Great batteries, my always go to battery.
Original Samsung Battery 25R Comes with battery cases.
I use these batteries a lot for my vapes either regulated or unregulated and the work great I buy them the most
Good battery last a lot longer than what you buy from Amazon
These are the older 2ah Dewalt packs. Still working on the best way to remove the old cells. Currently using a Dremel soooooo... Completed the project for two of these packs and they are working fine. Saved a lot of $$$ vs buying new packs.
Fast shipping and great batteries!
Got these batteries on a project of a rebuild of a 36 V E bike never done this before charge them on up all charged up as per rated weighed in at over 43 g a piece which is comparable to a good A battery assembled balance charged holding 4.19 after eight days Use them on a bike ride got better performance than the OEM battery
Good battery. Good price. Thank You
Great batteries at a very low price.
They're great! The delivery made 2 days before expected, and they came with this Handsome Carrying Case. 😊👍
They're great! The delivery made 2 days before expected, and they came with this Handsome Carrying Case. ????
Awesome pricing! Thank you 👍
Awesome pricing! Thank you ??
Rebuilt 3 dead tool batteries with Samsung 25R 18650 cells using a Kweld spot welder. Replaced 1300 mAh 20A cells with 2500 mAh 20A cells - better than new. Tools are happy.
Batteries came well packaged. They are true Samsung batteries 🔋 will be purchasing batteries from this supplier for future projects.
Batteries came well packaged. They are true Samsung batteries ?? will be purchasing batteries from this supplier for future projects.
Very Reliable battery
Built an ebike battery with these cells. They are working great. High quality cells.
Authentic batteries at a good price! Not to mention fast shipping.
Bought these batteries for my headlamp, they work amazingly, recharge capacity close to stated capacity. I would buy again.
What can I say the 25r is a great battery,its the workhorse of the vape game. And I.M.R. delivered quickly and on point as far as price. I always order from these guys because they know batteries and they ship fast.
What can I say the 25r is a great battery,its the workhorse of the vape game. And I.M.R. delivered quickly and on point as far as price. I always order from these guys because they know batteries and they ship fast.