I occasionally build and sell one of these SC21 Pro
comes w battery, and built in charger
the ad is here…
scroll down to the SOLD ones in the first post, for price details
there is also a Red Led light mod that runs on AA or rechargeables, called SP10 Pro (also in the SOLD list)
I have a few more SC21 Pro and SP10 Pro ordered, and 660nm Red LEDs in stock… PM me if you have questions