Muy buena batería 21700 Gracias
Key Features
- 5000mAh High Capacity: Maximizes runtime for energy-focused applications.
- 9.8A Continuous Output: Delivers consistent, reliable power.
- 21700 Flat Top Cell: Ideal for OEM and industrial battery assemblies.
- Samsung SDI Quality: Manufactured to strict performance and safety standards.
- System-Ready Design: Unprotected format allows full control via external BMS.
Overview
The Samsung INR21700-50E is a premium high-capacity lithium-ion battery designed for applications where long runtime and efficiency are critical. Offering a 5000mAh capacity with a stable 9.8A discharge, this cell is widely used in electric vehicles, large-scale energy storage, and professional battery systems. It is engineered for reliability when integrated into properly protected packs.
Applications / Uses
- Electric vehicles and mobility platforms
- Energy storage and solar systems
- Industrial and commercial battery packs
- Backup power and UPS solutions
- OEM and R&D battery development
SPECIFICATIONS
| Manufacturer: | Samsung SDI |
| Model: | INR21700-50E (50E) |
| Size: | 21700 |
| Positive Terminal: | Flat Top |
| Nominal Capacity: | 5000mAh |
| Continuous Discharge Rating (max): | 9.8A |
| Nominal Voltage: | 3.6V |
| Maximum Voltage: | 4.2V |
| Discharge Cut-off Voltage: | 2.5V |
| Protected: | No, unprotected |
| Rechargeable: | Yes |
| Approx. Dimensions: | 21.1mm x 70.7mm |
| Approx. Weight: | 68.7g |
| Country of Origin: | Republic of Korea |
Samsung INR21700-50E Data Specification Sheet
⚠ 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: 4.9 / 5 from 122 reviews.
Nice little shipping protection container
Seem great
Works like a charm. I'll be back for a couple quick drain batteries for my vapes soon!
Capacity measured as rated. Good value for the money.
We had to replace a battery that wouldn’t take a charge any longer, this battery worked excellent. We will be buying more in the future.
Great batteries! I use them in all my products.
Arrived without any damage and work well with my custom power banks.
The batteries last a long time. And they are amazing and awesome. And the price for them was awesome.
Built a 13s4p!
Ordering to build up some tool battery packs that will last. So sick of the weak cells that come in the packs and hard to fix them so decided to build my own.
The 50E batteries power our new MMX Nomad portable HF Morse radio station, and work very well. We include a solar panel to charge them, and they last typically several weeks without a recharge. We are extremely happy with these batteries - they preform extremely well for us. We have a switching supply for B+ power, with three power levels, plus a standard 5V supply for logic.
Needed a replacement for a bicycle light, easier to replace than sending in assembly and waiting for return. Not available in local area anywhere in stores.
Rechargeable li-ion batteries are not sold at department stores.Local vape shops and even eBay are selling suspicious brands like SupedUltraBlazingFire 1,000,000mAh :grin:. On the other hand IMR sells brand name batteries. Prices are very reasonable. And shipping is fast.
Looks good sofar!!
Working very well in a solar pack setup for powering all types of devices around the house!
Too big for my light
Nice
Sell had great communication, very fast shipping , and overall such a streamline smooth and easy shopping experience. I would recommend this seller to anyone looking at purchasing the many products that they offer. I will definitely be making more future purchases thru this company/seller, this day in time it’s hard to find an honest online store, but I can’t 150% say this will be my go to for anything battery related. Do yourself a favor and shop here and know that you’re getting genuine authentic merchandise with out having to worry if it’s knock off product or scam site like we all question and are weary with making online purchases. If I could give this store a 10 star rating I would. They were seriously that amazing and professional.
Higher capacity (but lower amp output) replacement battery for Milwaulkee battery packs using 21700 cells
perfect
Exceeded my expectations
It's good, it fits perfectly
all have a DC IR of around 32-38. capacity tested out at 4650mah. They do get warm with current however.
The battery life is unbelievable last a long time
Was exactly what I needed for my D4K hank light
I tested all four batteries. They all were extremely close to the 5000mah rating. That being said I've tried other batteries and they were 25%-35% off their mah rating. Go with IMR, and this battery if you need the best.
Great selection , super fast service. Always.. This must have been my 3rd order from IMR … flawless !
These arrived with what I assumed was low voltage but according to the spec sheet that is shipping voltage. I have cycled them a few times at .1C and they all show 5.1 Ah. I can't seem to edit my original review so I am just posting an updated review.
I am working on cycling them but am not pleased with the low voltage state in which they arrived. 3.8 volts is storage and these arrived at 3.55v.
They work great. They hold their charge, last a long time, and recharge well.
Very satisfied Thanks once again
Battery works good and the price was great
Sold al of them to a client , and he Is happy
Haven’t ever had a Separ Samsung battery great product great service thank you
Best
Excellent product - excellent service
Works great in my flashlight. Would recommend Good service by IMR, as well.
Good
Super fast shipping, exactly as I ordered. Will order again from these folks.