This is a handy little non-rechargeable CR2016 Lithium Coin Cell Battery!
Sitting at 20mm diameter and is 1.6mm thick it’s small but packs a punch with a nominal voltage output of 3V and a capacity of 90mAh. For other drain rates the capacity may be reduced, check the datasheet! Note that these are often “stacked” to make a 6V CR2032-sized pack of batteries.
This is a super beefy non-rechargeable CR2450 Lithium Coin Cell Battery!
Coming in at a 24.5mm diameter and 5mm thickness this battery kicks major butt with a nominal voltage of 3V and a capactiy of 610mAh! For other drain rates the capacity may be reduced, check the datasheet!
Make a robot friend with Adafruit’s CRICKIT – A Creative Robotics & Interactive Construction Kit. It’s an add-on to our popular Circuit Playground Express, FEATHER and other platforms to make and program robots with CircuitPython, MakeCode, and Arduino. Start controlling motors, servos, solenoids. You also get signal pins, capacitive touch sensors, a NeoPixel driver and amplified speaker output. It complements & extends your boards so you can still use all the goodies on the microcontroller, now you have a robotics playground as well.