Help: Understanding Battery Stats

blerkoid

Newly Enlightened
Joined
Aug 31, 2013
Messages
167
Hello CPF,

I am hoping someone can help me better understand the information displayed by websites regarding batteries.


I recently ordered four of the following:

Samsung INR18650-20R 2000 mAh High Discharge Flat Top
Specifications:
Nominal Capcity: 2000 mAh
Nominal Voltage: 3.6V
Discharge End Voltage: 2.5V
Standard Charging Current: 1.0A
Charging Voltage: 4.20+-0.05V
Max. Continuous Discharging Current: 22A
Internal Resistance: less than 15 milli-ohms

I understand this to mean I should not charge the battery above 4.2v (overcharge) or let it fall below 2.5v (over-discharge).
Can someone please confirm or correct my current understanding?

Is there anything else I should be cognizant of with the above information?

Thank you in advance!
 

Lou Minescence

Flashlight Enthusiast
Joined
Mar 12, 2011
Messages
1,189
Location
New England US
Sounds like you have the max charge / discharge voltages figured out.
I question this spec
'Max. Continuous Discharging Current: 22A'
Maybe it's me. I'm not sure.
 

vicv

Flashlight Enthusiast
Joined
Mar 22, 2013
Messages
2,741
Location
Southern Ontario
The max continuous discharge is correct. That's a good battery. Also it's telling you to charge it at a max of 1A. It's capacity is 2000mah. Meaning a 2A load on it will last 2 hours before dead. And 1A for 4 hours. Ect. Also the 2.5v discharge is under load. Don't let the cell be less than 3.2-3.3V when tested out of the light with a multimeter. I can't think of anything else. Oh. 3.6V nominal voltage. Over the entire discharge of the cell the average voltage will be 3.6V.
 
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