Description
Samsung 50E 21700 5000mAh Lithium-Ion Battery – High-Capacity Power for E-Bikes & DIY Battery Packs
Why Choose the Samsung 50E?
✔️ 5000mAh High-Capacity – Longer runtime, fewer charge cycles✔️ 9.8A Continuous Discharge – Reliable output for power-hungry devices
✔️ Durable Cycle Life – Maintains 80% capacity after 500 cycles
✔️ High-Energy 21700 Cell – More power storage than 18650 batteries
✔️ Great for Battery Packs & E-Bikes – Steady power under high loads
The Samsung 50E 21700 battery is designed for high-drain applications, delivering exceptional energy storage, stability, and efficiency. With 5000mAh capacity and a 9.8A continuous discharge rate, this rechargeable lithium-ion cell is an excellent choice for e-bikes, battery packs, power tools, and solar storage.
Samsung SDI’s advanced cell technology ensures high energy density, stable voltage retention, and long-lasting cycle life. Whether you're building custom battery packs, upgrading an electric bike, or designing an off-grid power solution, the Samsung 50E provides consistent and reliable performance.
Specifications
| Brand | Samsung SDI |
| Model | 50E (INR21700-50E) |
| Cell Size | 21700 |
| Nominal Capacity | 5000mAh |
| Minimum Capacity | 4900mAh |
| Continuous Discharge Rating | 9.8A |
| Nominal Voltage | 3.6V |
| Full Charge Voltage | 4.2V |
| Discharge Cutoff Voltage | 2.5V |
| Rechargeable | Yes |
| Protected | No (Unprotected – Requires external protection circuit) |
| Cycle Life | Approximately 500 cycles to 80% capacity |
| Diameter | 21.1 mm |
| Length | 70.7 mm |
| Weight | ~69 g |
💡 Pro Tips for Maximum Performance
🔹 Charge batteries before first use to activate optimal chemistry🔹 Keep away from extreme temperatures to prevent capacity loss
🔹 Ensure proper insulation when using in battery packs
⭐ Why Buy From 18650Battery.com?
🔹 100% authentic batteries🔹 Over a decade of expertise in lithium-ion technology
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🔹 Dedicated support team for technical assistance
⚠ 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 the battery overheats, emits smoke, or swells, move it to a non-flammable surface (e.g., sand or concrete) and stop use immediately. In case of fire, use a Class D fire extinguisher or sand. Do not use water.
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.