The Samsung 50E 21700 Button Top Lithium Ion Cell with Built-In Protection is a high-performance power solution designed for flashlights and devices requiring protected cells. Its button top design ensures compatibility with various devices, while its built-in protection safeguards against overcharging, over-discharging, and short-circuiting. With a generous capacity and Samsung's renowned durability, this cell offers reliable performance and longevity. Upgrade your flashlight or device with the Samsung 50E 21700 for optimal power and peace of mind.

NOTE: These cells are slightly longer than the standard 21700 cell as they have a protection board located on the Negative end of the cell. This increases the total length to approx. 76.5mm. Please make sure your device will accept this length by cross referencing with your original cell or measuring the maximum length the battery compartment can accommodate (please factor in the mm of the terminal points).

As these cells are longer than the standard version, they may not fit in all chargers. Please click to direct you to compatible chargers.

Specifications:

• Model: INR21700-50E
• Size: 21700
• Head type (Positive terminal): Button Top
• Maximum Capacity: 5000mAh
• Typical Capacity: 4900mAh (0.2C discharge)
• Peak discharge rating: 15A
• Continuous discharge Rating: 9.8A
• Nominal voltage: 3.6V
• End-of-charge voltage: 4.20V
• End-of-discharge Voltage: 2.50V
• Rechargeable: Yes
• Protection circuit: Protected. Protection built in
• Approximate Dimensions: 21mm x 76.5mm
• Approximate Weight: 71.8g

Please note these cells are not suitable for E-Cig's or VAPE's. Please click  to direct you to approved cells.

Batteries will only have test charge. Ensure batteries are fully charged to reach full capacity. Failure to do so may lead to long term cell issues.

This cell is unprotected and intended for use in protected battery packs. In order to operate safely it must have additional protection in the form of a protection circuit board or a Battery Management System. 

Usage & Charging

!!!!! IMPORTANT!!!!! These are immensely powerful batteries, and extreme care should be taken using them. Only use with brand name, quality chargers (like LiitoKala, Nitecore, XTAR) and equipment! Unfortunately, we cannot replace batteries that are damaged by non-compliant chargers or equipment. There are so many chargers on the market, we cannot possibly keep track of which ones will work with these batteries. You will have to contact the charger manufacturer to ensure it can charge these batteries without damaging them. Please ensure you only use these (or any other Lithium Ion) batteries with proper Lithium-Ion chargers and equipment. Lithium-Ion batteries can easily be damaged by charging them with too high current or exceeding the maximum rated current discharge. 

We are bound by the Office for Product Safety and Standards in the UK to advise that Samsung have not designed, manufactured, endorsed or otherwise approved these products for use by consumers. You are of course free to use this product in any way you deem fit, but we recommend you consider that we make the following statement in light of Samsung's position.

Samsung SDI Batteries are not designed, intended or manufactured for use in vaporiser kits, mechanical mods, or anything known as electronic cigarettes. 

All our Samsung SDI cells are printed with WARNING! FIRE HAZARD, NOT FOR VAPE

Use at your own risk. We do NOT accept any responsibly for damage, injury or death caused by improper use of these batteries!

• Do not overcharge!Ensure the charger voltage does not exceed the batteries stated full charge voltage.
• Do not over-discharge!Ensure the equipment you use do not draw more current than the batteries “Maximum Continuous Discharge Current”.
• Do not leave batteries discharged for a long period!Leaving Li-Ion batteries in a discharged state can incur irreversible damage – creating a loss in capacity and a loss in cycles.
• Do not short circuit your batteries!NEVER short circuit a 21700 (or more other) batteries! Short circuiting can cause a huge surge of current that will potentially burn out your battery, damage your equipment, and even cause serious injury to you!
• Do not let your batteries touch each other or other metallic items! Keeping your batteries loose, such as in your pockets, is a serious way to have your batteries fail and seriously harm you. There are battery holders and covers to keep your batteries safe.
• Do not dispose any battery in a fire! There are dangerous chemicals in batteries. If you try to burn your batteries, they will release dangerous fumes and will probably explode. Always dispose your old batteries to a battery recycling centre.