rickypanecatyl
Enlightened
- Joined
- Nov 2, 2009
- Messages
- 913
So I made this silly chart comparing battery volume sizes and their "potential capacity" if compared with a 3,500 mA 18650. So for example, a battery that truly has the dimensions of 21mm diameter and 70mm length has 147% more volume than 18mm diameter x 60mm length battery. And a 147% of 3,500 mA = 5,145 mA which isn't far off the capacity of a good 21700.
Now I realize there are lots of other factors but I've never seen a 26650 with more than 5,000 mA capacity and just am curious why that is so short of the 7,315mA on my chart?
Any ideas? Possibly little demand so not much pushing of the envelope in that category?
Battery volumes
I put a hypothetical 24900 battery at the bottom as I've got large hands and that would probably be my "dream size" for an EDC size light. An SBT 90.2 in a light with a 30mm diameter body and a 40mm diameter head... wouldn't seem much bigger in my pocket than a 18650 light with a 25mm body and 40mm head!
Now I realize there are lots of other factors but I've never seen a 26650 with more than 5,000 mA capacity and just am curious why that is so short of the 7,315mA on my chart?
Any ideas? Possibly little demand so not much pushing of the envelope in that category?
Battery volumes
SIZE | MM3 | % 18650 | potential mA |
18650 | 16,532mm3 | 100% | 3,500mA |
21700 | 24,232mm3 | 147% | 5,145mA |
26650 | 34,493mm3 | 209% | 7,315mA |
16340 | 6,833mm3 | 41% | 1,435mA |
14500 | 7,693mm3 | 47% | 1,645mA |
24900 | 40,694mm3 | 246% | 8,610mA |
I put a hypothetical 24900 battery at the bottom as I've got large hands and that would probably be my "dream size" for an EDC size light. An SBT 90.2 in a light with a 30mm diameter body and a 40mm diameter head... wouldn't seem much bigger in my pocket than a 18650 light with a 25mm body and 40mm head!