i dont really sonsider it a downside as such more of a mild annoyance i just keeps some AAA eneloops in the bag with it and put them in as needed
only pain in the ass is there is no on / off switch so you just have to take the batteries out when finished
not a big deal really
To be fair, you can't turn off the genuine Canon TC-80N3 either.
I keep my battery in there, but reversed, it's perfectly usable as a remote switch without power. If I want timer functions, then I just take the battery out, reverse it, and use it as intended.
I didnt know that, never used the genuine one
The absence of an off switch is mentioned as a downside quite often and I don't really understand why. The power consumption is minuscule, probably equivalent to a digital watch, yet nobody fears leaving the battery in a digital watch.
Does your off-brand take AAAs?
Genuine Canon takes a flat battery, like CR2020 or 2032 (yes, i'm too lazy to move 1.5m to get it off the floor and check).
And yeah, it probably drains as much power as a watch in standby mode (and probably barely above not-installed-self-draining), so flipping it over like I do probably isn't going to make it last much longer. But I have a habit of not carrying spares, last time it was a dead battery in the eos 3 at 11pm on a saturday for a concert. Good thing I had a 7D and Pentax Spotmatic as backup...