My last attempt to use my 5D Mark II with MagicLantern latest version was on May 1, 2020. Not only it locked up my camera, but it also fully drained a fully charged battery in about 40 seconds. Before the battery was fully drained, the Live View turned on without me initiating it, the mirror locked up also by itself, and the LCD turned black. EOS 5D Mark IV. Brand new, battery icon on camera rapidly flashes. Fully Charged. I have tried 3 different batteries (all Canon) with same issue. I also changed lenses, still flashes. Any thoughts would be appreciated. Mike in Danville's gear list: Canon EOS 5D Mark IV Canon EF 24-70mm F4L IS USM Canon EF 16-35mm F4L IS USM Canon 85mm F1.4L IS Amber charging light blinks rapidly. The old LC-E6 charger that came with my EOS 7D charges these batteries normally. I junked the charger that came with my 5D Mk III, and bought a new LC-E6 from B&H. This unit has the same issue. It will sometimes charge some of my Canon batteries, but more often the amber light, after about 20 seconds just ARQ64yT.

canon 5d mark 2 battery charger