4 ms·
Li-ion 18650 cells held 2300mAh in 2005[1], and 3350mAh today[2]. That's an increase of 45% in just under 11 years. If capacity were really growing at 8% per
by p1mrx 11y ago
Li-ion 18650 cells held 2300mAh in 2005[1], and 3350mAh today[2]. That's an increase of 45% in just under 11 years. If capacity were really growing at 8% per year, then 18650 cells should have a capacity of 5300mAh by now.
[1] http://www.candlepowerforums.com/vb/showthread.php?88468-Triton-data-on-LiIon-cells-updated&p=1044873&viewfull=1#post1044873 http://www.candlepowerforums.com/vb/showthread.php?88468-Tri...
[2] http://www.candlepowerforums.com/vb/showthread.php?417736-Test-Review-of-Sanyo-Panasonic-NCR18650GA-3500mAh-(Red)&p=4875552&viewfull=1#post4875552 http://www.candlepowerforums.com/vb/showthread.php?417736-Te...
- marvin 11y agoDid you compensate for cost in this example?
- imaginenore 11y agoCost has nothing to do with this argument. He is talking about energy density.
- ars 11y agoQuite the opposite. For grid storage (in contrast to cars) energy density is irreverent (there is plenty of space). What matters is cost.
- eru 11y agoI was talking about cost. I don't know about p1mrx. In any case, a bit of Googling will give you more details about the improvements than my faulty memory..
- imaginenore 11y agoThat's 3.5% per year growth. Not bad.
- eru 11y agoOh, it's not just one technology getting the increase, but switching to other technologies over time. Thanks for digging up the numbers!