Topic on Controller talk:Xbox Wireless Controller
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My xbox core controllers seem to have a higher amperage draw when powered on compared to previous controllers, so when using old rechargable batteries with a higher internal resistance the light blinks once and the conotroller fails to turn on. If I connect it through USB briefly to supply that initial power spike it will turn on. Old controllers don't have that problem. Tested on 2 core controllers (model 1914), 1 one s controller (model 1708) and 1 original one controller (model 1537). Would be nice if anyone else can confirm to add it to the wiki, test if some batteries that won't turn on the core controller work in some of the older models