The 26650 battery has been used for vaping for quite some time now. They are 8 mm wider and a bit heavier than 18650s, but make up for their mass in battery life and, in some cases, amperage output. Other uses for these cells include laser pointers, flashlights, and cordless power tools.
While there are still many 26650-compatible vape mods that have been embraced in the last few years, there are no Samsung, LG, Panasonic, or Sony 26650s available now; most are rewrapped cells and are often inaccurately rated. As a result, 26650s are becoming phased out by 21700s, which are starting to become the high capacity vape batteries of choice. Also note that mods that take 26650s will generally come with sleeves that make them compatible with 18650s, which offer many options from reputable manufacturers.
The Hohm Grown 2 has similar specifications to the rest of the batteries in this list, but is typically more available. These are accurately rated 30A batteries, with updated wraps that have max wattage printed on them. A great option for single-coil rebuildables and sub ohm tanks, Hohm Grown 2s are best run in the 65-70 watt range.
The Golisi gold has been a good choice for both unregulated and regulated devices. Slightly overrated on the wrap but a solid cell, it performs like the Aspire INRs and IJOY 26650 but uses a slightly different top contact. The Golisi gold is the same battery that comes included with the Aegis.
Aspire has been a trusted name in the industry for vapes, but more recently with batteries too. The Aspire INR comes with a much longer running time than 18650 batteries and can be an excellent pairing for 26650 mods. It is a rewrapped cell, comparable to the Golisi and IJOY 26650s, and is actually a few bucks cheaper.