For those Tiny85 boards that have RSTDISBL fuse programmed, the HV programming can be done with an Uno, resistor, and 12V battery or other 12V source. If USB connection is not needed, but still desire the USB power port, remove the 2 resistors that connect PB3 and PB4 to the USB connector. That makes the board a simple breakout board with a regulator for VIN input, and a USB socket as alternative power supply. Programming the RSTDISBL to gain another I/O pin is an easily accessible feature, and easily reversed for programming a new sketch.