I have a 2020 E180 RS. Brakes are Code RSC and they are brilliant. I think the callipers are the same so a cheaper upgrade would be just to fit RSC levers.
They are around 27kg for a Large frame.
Batteries about 5kg so you can lower that weight a lot if your carrying it up stairs or whatever.
Putting the battery cover back on I find a bit fiddly though, seems like it would be easy to ruin the threads on the bolt if you don't line it up properly
I have the 2020 E150rs with the code RS levers and I can’t fault them for power not least of all my weight has significantly increased due to all the pain killers side effects and they still stop me really fast, I know I’ve posted about changing to Hope rotors but that’s only because of the difference in colour to the radiators I’ve got on my bike