Test/review of Sanyo NCR20700A 3100mAh (Red)

[size=+3]Sanyo NCR20700A 3100mAh (Red)[/size]



Official specifications:

• Rated capacity: 2900mAh
• Minimum capacity: 2950mAh
• Typical capacity: 3100mAh
• Nominal voltage: 3.6V
• Charging method: CC-CV
• Charging voltage: 4.20V
• Cycle life: 300 cycles to 60% at 10A discharge, 6A charge.
• Charging current: 2065mA (Standard)
• Weight max.: 55.4g
• Temperature: Charge: 10°C ~ 45°C, discharging: -20°C ~ 60°C, Storage: -°C ~ 50°C

This is the new battery size that is slightly larger than 18650 cells. This cell is a high current cell with moderate capacity.










The two cells tracks perfectly and can easily deliver the rated current.




But the batteries get warm when delivering high current.



At maximum rated current they are up to 81°C



In this discharge the battery is in free air, i.e. it has better cooling.















[size=+3]Conclusion[/size]

This battery is a very good battery and one of the best high current cell I have tested to date. At lower current there is no reason to use this cell (Instead use the NCR20700B cell), only when the current is above 10A is this cell interesting.



[size=+3]Notes and links[/size]

My test stations is only equipped to handle up to 30A, this means higher current must be done on other equipment.

How is the test done and how to read the charts
How is a protected LiIon battery constructed
More about button top and flat top batteries
Compare to 18650 and other batteries

WOW! This is exciting. Isn't this the size that Tesla is using now?

Looking at this 20700A versus the Samsung 21700-30T in your Comparator tool, at 10-30A, shows the 21700-30T to be the better performer, in voltage and capacity.

MAD777 said:

WOW! This is exciting. Isn't this the size that Tesla is using now?

Click to expand...

Tesla is using 21700 (or 21-70, as they like to call it).

SubLGT said:

Tesla is using 21700 (or 21-70, as they like to call it).

Click to expand...

Which raises the question as to whether the 21-70 renders the 20700 DOA, in terms of development and eventual wide spread adoption.

Maybe. But 20700 is currently being used in some power tool battery packs, as is 20650.

Sanyo's NCR20650A (rated at 30A and 3100mAh) is now available in the USA from imrbatteries, as is the LG HG6 20650 (30A, 3000mAh). I wonder how the Sanyo 20650A compares to the 20700A. Are they as close as their specs imply?

I forgot HKJ has already tested the Sanyo 20650A:

http://lygte-info.dk/review/batteries2012/Sanyo NCR20650A 3100mAh (Red) UK.html

http://www.candlepowerforums.com/vb...-Test-review-of-Sanyo-NCR20650A-3100mAh-(Red)

Using the HKJ comparator tool, the 20700A cell is the better cell at all discharge currents.