I was looking for batteries and chargers for Lego electrics. We needed a charger capable of simultaneously charging from 6 batteries (that's how many in the Lego train and Powered Up hubs). I bribed the presence of batteries in the kit, they were charged out of the box. The charge is kept normally, a rather gluttonous Lego model worked with ordinary Dulacel batteries in 4-6 hours of use, these batteries lasted several days of active play. The child has enough to play with a margin.
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