Here is another example this is reporting amps.

The data is two bytes. How is the amps being derived from those two bytes?

$FF $A6 = -4.5A
$00 $5F = +4.6A
$01 $16 = +13.6A
$01 $61 = +17.1A

I suspect the sign is in the first byte.

In the bottom example I was thinking 1 x 128 + $61 = 225 then do something to get 17.1?