A battery tester performs checkups to ensure your ride ... set of clamps onto the negative and positive terminals of any 12V lead-acid battery and entering its CCA (Cold Cranking Amps) rating ...

He bought a Quick Charge power bank and then hacked a Digispark to negotiate with the power bank to provide 12V output to Quick ... at version 4 and supports USB-C and USB-PD hardware such as ...