saddiq abubakar

hello everyone. i just bought my first 35mm camera an arri 435 while i have experience with s8 and s16 cameras im learning more and more that 35mm is a whole new beast. ive been doing research on which 24v battery to buy for the 435, but the results im getting are all over the map. ive seen belts which look like a good option but it seems like those are more suited for steadycam ops? i havent seen any onboard batteries for it, do they make them? i understand that different framerates call for different amounts of power i dont think ill be shooting too much at 150 fps but it would be nice not to be limited if the moment presents itself, also can i not use the same 24v batteries that i would use for an alexa? what price range am i looking at ? thanks a lot everyone cheers!