Clementine

Clem --- A battery charger and a DMM is a very limited bench. Battery chargers are typically unfiltered DC.

What are you trying to run? Why me a friend?

HMike

I have a DMM and a battery charger can you suggest me as to what heat sink I should get, Thanks.

You will need a better heat sink. The more metal the better.
You will need some sort of "host"
Set this diode at 170mA for longer life

The "manual" for the Rkcstr driver on his website will tell you how to measure your driver's current and how to set it. You will need a DMM to do it and some sort of power supply (batteries is fine) to power the driver when you set it.

If you haven't thought about it, you will need a charger for the batteries