Originally Posted by firebird854

Maybe we're thinking about two different cranksets, cause, the battery is is located just behind the crank under an easily accessible rubber cap (this is essentially a rebranded Power2Max Ngeco):

Also, the crank set on my previous bike is essentially this with carbon cranks and it feels exactly the same while giving accurate and cheap dual sided power.

I haven't had to change the battery yet but I doubt it'd take much longer than 30 seconds...