i have two dual chargers and 8 HCs.
about 100 cycles on each so far
no issues. and yes Alexa do eat em like candy.
usually between setups (or longer wait between takes ) i let assistants put a battery on the camera then unplug the cable from sled and use the block battery to keep the camera on
this means my HC only drains when rolling.
so in general that shortens the time of consuming my HC A LOT.