This board will fry onboard components when the battery is on AND you have an Arduino USB connector plugged into the host computer. You will effectively tie the 5V rails together, there is no switching on the board. That seems pretty easy to me. There is a blog that covers this and other board topics in detail. save your money
π§ Premium Repair Replacement Screws & Tools for MacBook Pro Retina 15"/13" - Complete Bottom Case Set
10 Review
Glarks 660 Pieces Phillips Assortment Motherboard
10 Review
uxcell 3.5" HDD Screw Black 200pcs for Computer PC Case - Flat Phillips Head - 6#-32 - Hard Drive Fasteners
10 Review
36-Pack Black Rubber PC CPU/Case Fan Screws/Rivets Set for Computer
11 Review