I snapped a plastic spudger trying this Step 6. I found an easier way, was to simply flip the shaver to the other side, use your thumbs to push upwards the inner unit from the outer unit. There is no bracket or clip that is actually holding it together that you must manipulate with a tool. Thanks for the writeup.

Thank you to the author and the community, very helpful!

My experience was the following:

-North American 7000 model, had the green Suppo batteries

-replaced with two Amazon rechargeable NiMH AAA batteries; they fit fine

-used electrical tape, didn't (have) solder

-hardest part was to put back on the black cover over the battery/switch unit, had to to squeeze its body into place, took some time! I didn't find that a tool helped here much, used my fingers to squeeze it in. Be careful not to snap this thing.

-initially the battery/LED unit blinked 8 times in orange, when not attached to the shaver; once attached, I charged it, it blinked green, until a solid green. works as expected.

-didn't read until later, other comments about installing depleted batteries first, but my already charged batteries seem to be working fine and can charge.