The Samsung 50S, also known as INR21700-50S, is a high-capacity 21700 lithium-ion cell with a typical capacity of 5000 mAh. It combines excellent energy density with reliable discharge performance, making it suitable for demanding applications where long runtime and stable output are needed.
This battery is an INR / Li-ion type without an internal protection circuit (unprotected). This means safety features must be managed by the device or charger. It should only be used in systems designed for unprotected cells. The nominal voltage is 3.6 V, maximum charge voltage 4.2 V, and discharge cut-off is about 2.5 V. Dimensions are approximately 21.1 × 70.6 mm and the weight is around 70 g.
Contents
- 1 × Samsung 50S (INR21700-50S) cell
Features
- Type: Li-ion / INR 21700
- Capacity: 5000 mAh (typical)
- Continuous discharge: 25 A
- Pulse / maximum with temp limit: up to approx. 45 A
- Nominal voltage: 3.6 V
- Full charge voltage: 4.2 V
- Discharge cut-off: approx. 2.5 V
- Dimensions: ~21.1 × 70.6 mm
- Weight: ~70 g
- Protection: No internal protection circuit (unprotected – requires device/charger with safety features)
- Manufacturer: Samsung SDI
Frequently Asked Questions
How do I charge the Samsung 50S?
Use a quality Li-ion charger with CC/CV profile charging up to 4.2 V and monitoring cells individually. Recommended charging current is up to 6 A.
Is this battery safe for vaping / mods?
Yes, provided the mod or device has proper safety protections and the battery is not pushed beyond its rated specifications.
How long does the battery last per charge?
It depends on power settings and usage. At moderate power it can provide many hours of runtime, while high wattages will shorten runtime.
What is the difference between 21700 and 18650?
21700 cells are larger, offering higher capacity and energy density compared to 18650, but require devices designed to fit the larger size.
About Samsung SDI
Samsung SDI is a leading manufacturer of lithium-ion cells and energy storage solutions. Their batteries are highly regarded for quality, reliability, and performance across both consumer and industrial applications.
