I bike for transportation in Washington, DC. Sometimes I leave my bike locked up for 10 minutes; other times for several hours.

Here's what I'm looking for in blinkie lights:

1) Cheap ($40 for a set of front and rear blinkies, or $20 each)
2) Easily removable. No more than two seconds to remove.
3) Tiny and somewhat flat. Can comfortably fit both front and rear blinkies in my pocket, alongside my keys/cell phone.
4) Won't accidentally turn on in my pocket.
5) AAA or AA battery powered (or other no hassle, non-rechargeable batteries; I'm entirely against USB rechargeable)
6) Good battery life. $20/yr for batteries is too much.

Maybe I've got too many requirements, but I'm hoping someone can shed some light so I can improve on my current lights. Currently I have the following:


Pros: $13
Cons: Boxy shape isn't ideal for pockets; attaching/detaching isn't as quick as other lights




Pros: $17; easily removable;
Cons: battery life could be better; light accidentally turns on in pocket; a little bulky; require a tiny screw driver to replace batteries.




Pros: $15; easily removable; size is relatively compact
Cons: battery life could be better

What's wrong with USB rechargeable?

Takes extra time. I'd rather go a couple months without having to think about powering my lights. I'll admit I've never used USB rechargeables, however. Maybe I'm under a false impression. How many hours of battery life, and how many weeks, can you get before having to recharge? Thanks.

I can't really say how long my Hotshot or Flea will go on a change, but I do know that it's not often and it's not an issue. The Flea in particular is easy to recharge. It has a magnetic dock that can live in the USB port. Changing batteries is much more of a hassle than placing the Flea in it's dock.
I do know that I can take a week long trip and not have to recharge the Hotshot.

https://www.lezyne.com/femto-drive-rear

$14.99 for the front and $14.99 for the rear. They seem to be exactly what you are looking for.