ORIGINAL: goirish
I was at the hobby store the other day. MPI has a switch that's also a charger plug in. Bigger surface area on the outside of the fuse, but combines the switch and the charging jack. Eliminates one wire on the inside of the fuse. Gonna try one of those next.
I went to one of these on my second plane, and doubt that I'll ever use anything else. I had to enlarge the switch hole on the the Sig and the Skylane to fit the switch, but it makes it just SO easy to just plug in the voltmeter and check the status of the battery. To me that alone is worth the minor aggrevation of enlarging the hole and having a larger switch visible.