9V 2A Power Supply Adapter AC DC Cable Cord for Arduino UNO MEGA, 5.5mm x 2.1mm & 2.5mm Plug, and More (6ft)

Got tired of changing batteries in my kitchen garbage bin with auto opening. It worked really well but needed SIX AA batteries every couple of months! So I bought this power supply to eliminate the need to change batteries. I clipped off the round jack and soldered metal tabs on the ends of the leads. I then slipped the tabs in the appropriate contacts for + and - poles holding them tight against existing battery springs with small dowels cut to length. Plugged it into the wall and voilà no more battery changes. It’s been several months and it works perfectly.

This charger worked perfectly for my Milwaukee M12 radio/charger.

Worked perfect for my Leslie effects pedal

These work great for some of my Arduino projects

Good power supply