I always compare cells on HJK's site but last I looked I think the VTC6 outdid the 30Q in some situations but they're really close in performance. I harvested some VTC4s from a Dyson battery pack and even for being "earlier" and abused in a vacuum power draw they do well for the most part. For low drain I've been sticking with Samsung, 35E mostly. I've been happy with the Vapcell models I own but I only look to them for the sizes that the majors don't make (14500, 26650, etc)...worth comparing with the others, though.
Ditto on good luck purchasing right now. In the last two weeks a coworker and myself have placed two orders with Liion - they barely have anything in stock and the prices are higher than they were in just January of this year (shipping, also) but they're in better shape than the other decent online battery sites. I usually add a cell or three to my orders when I need small items or fewer items just to make the shipping cost worth it, but I couldn't do it this time.
Add the Molicel M35A to the 3500mAh/up to 10A category. For 10-15A the best cells are the Sony VTC6, but only if you get genuine ones as there are lots of fakes. For over 20-30A you have the backordered ‘custom cell’ Vapcell S30, other options are Molicel P26A, Sony VTC5A/D and Samsung 25S.
Buy some batteries now to be in the safe side, but for large purchases wait a few months until Japan and Taiwan finish vaccinating their vulnerable population, they barely started. At least Molicel has a plant in Canada so it should remain available if the other have to shutdown. By that time the supply issues should be solved.
Got an email from IMR Batteries today for their holiday 10% off of all 21700 cells. Took a peek at their site and they did show to supposedly have some 36G, 30Q, and several Sony VT6 flavors in stock. I can't believe how many cells/sites are out of stock at this moment in time. Crazy.
At that price it’s not a bad deal in terms of $/mAh, furthermore they are capable of very high drain. Most flashlights that don’t need them will nevertheless work with high drain cells (except the ones with a design flaw where an unregulated FET driver is used together with a very low forward voltage emitter or with a delicate emitter like the 219B), so given that short term production in their Taiwan plant may be impacted by the recent Covid19 outbreak in that country, I say buy some more now. If getting 18650 batteries from USA was cheaper and easier for me I’d buy them. I’m not really sure what 18650batterystore is thinking doing a sale while supply may be threatened in the short term.
They call this marketing thing as a “Customer Appreciation Sale” The email I received says “We know availability and pricing have been crazy this year. We’re doing our best to keep prices as low as possible and will never sacrifice the quality of batteries we offer.” Anyway they are the Molicel authorized dealer and Molicel is very friendly to consumer market while all other major manufacturers are tightening their controls so I believe they have huge stock for these P26As. Also there is a rumor that Molicel is going to release P31A in this summer……