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Hello to all, It's been a long time since I was in the forum, therefore I do not know ( I did a research but couldn't find one) if a similar topic was opened before. Since the powerbanks have started to be able to give 9V outputs 2 amperes, Even 12V 1,5 amperes with a rated capacity of 12.000 mAh and a total capacity of 20.000 mAh or more, I started to think about using powerbanks instead of 1,5V*6 AA or AAA type batteries in powered and/or lit-up sets. These batteries clearly create a battery pollution after losing their full power or all of their power, thus needed to be replaced. This means money, toxic waste, corrosion of the hubs, unplayable/unusable sets. Corroded batteries create health problems, performance problems, usage problems. (i.e. Haunted House Set with "Powered Up". If the AAA batteries lose power, then the lift in the set immediately start to have problems. First of all, I believe the set's lift system using "Powered Up", has clear faults. Because the motor used to operate the lift is timed and its speed is also cleverly calculated. The lift's wheel system has problems. Many times, it is stuck, doesn't reset properly or because of the wheels slowing down the lift when falling do not act properly when the lift is going up, I tried taking off the side walls of lift, touching the wheels. This made the lift work properly but alas, when it did the panic fall, the wheels did not slow the lift down, so it had a "free-fall". Furthermore, if the batteries lose power, then the lift can not operate properly.) From what I see, at least in Turkey, LEGO is working with VARTA. VARTA has very durable and powerful powerbanks reaching up to 18.200 - 20.000 mAh. Yes, it is large but the technology is improving more and more. The price of the powerbanks? Well, even the VARTA ones are less expensive than the battery hubs sold by LEGO. The outputs can be various (USB-C, USB, micro-USB etc.) and they can simply be adapted to LEGO motors with some modifications. And after a 5-6 hour recharge after full depletion, voila! No waste, no power loss, no unnecessary battery buying/storage and thousands of reacharges only with a smart USB adapter. So? Why not? The powerbanks do not lose their full power at all until they are totally depleted. Because I am not an expert in battery hubs vs. powerbanks in means of generating power to the motors, kindly please warn me if I am talking nonsense. Best of health and Regards, Idris