What do you do when you’ve got a pile of quality Panasonic NiMH batteries and power-hungry robots that need high-capacity charged packs?

If you’re the folks over at PDX Hackerspace, a community-focused collective in Portland, Oregon, you assemble them into bot-ready packs and design a Teensy-powered board to charge them!

Teensy monitors the ambient and internal battery temperatures in order to prevent over-charging, and appears to incorporate a piezo speaker to indicate charge completion or problems.