When I charged my 60r to full, I took my vom and measured the voltages at the 3 gold colored contacts on the back of the FNB-83 battery, it is 7.49 I removed the battery and checked the voltage at the 2 (+ & - ) silver colored tabs that connect to the 60r and get a 8.6v reading. When battery is inserted in the 60r I get a 8.6 voltage reading in the display when I turn it on.