SAMSUNG ICR 21700 50E Li-ion Rechargeable Battery is a high performance 5000mAh rechargeable lithium battery with 20A high constant current applications.

Size: 21700
Nominal Capacity: 5000mAh
Rated Capacity: 4900mAh minimum
Nominal Voltage: 3.6V
Maximum Voltage: 4.2V
Discharge Current: 9.8A Maximum Continuous
Style: Flat Top
Protected: NO, UNPROTECTED
Approximate Dimensions: 21.1mm x 70.7mm
Approximate Weight: 68.7g

Warning:

Don't use with device that does not have BMS or PCB protection.
Don't store loose in your pocket, backpack, purse, or etc. Always use a case or box for storage or to carry with you.
When not in use, always store your battery in a case or box in which battery were delivered with.
Misusing or mishandling Li-ion battery can cause a serious risk of personal injury or property damage.
If misused or mishandled, the battery may explode, burn, or case a fire.
Usage of battery is at your own risk!
Only use with proper protection circuitry.
Don't short circuit intentionally or unintentionally.
Stay away from metal or conductive objects to prevent short circuiting.
Don't use the battery if battery's wrapper or terminal insulator is damaged or torn.
Don't use if battery is showing any visible damage.
Don't over-charged or charged battery above the maximum voltage rating.
Don't over-discharged or exceed battery above the continuous discharge rating.
Don't modify, disassemble, puncture, cut, crush, or incinerate the battery.
Don't expose the battery to liquids or high temperatures.
Don't use force to install the battery in any way.
Only use the battery within manufacturer’s specification.
Store the battery at a safe place where the pet/child can't reach.
Always charge the battery in or on a fire-proof surface and never leave battery charging unattended.
Only use a proper smart charger to charge the battery.
Please fully charged the battery before first use. The charging time may vary, depends on the charger you have (may need from 4 to 12 hours). If your charger has a capacity indicator, it is normal that the first bar or first 20% to 25% would take the longest time to be charged.
Always use the batteries that are same brand, same model, and same condition. Don't mix and match with other batteries.
Immediately stop using the battery if any abnormal appearance occurs.
It is your responsibility to make sure that your charger or device is functional.
If exposed to battery electrolyte, flush with water immediately and/or immediately contact a physician or emergency services.
Don't throw away in trash; please properly recycle or dispose the battery.