Cubelets are powered by 3.2V LiFePO4 batteries, which can't be charged with just any charger. This is the battery charger that you'll need for the Cubelets Battery Block. It can charge both batteries at once and includes adapters for both 120 to 240VAC home and 12VDC automotive use!

A built-in microprocessor automatically shuts down when batteries are fully charged. Charge 1 to 2 RCR123A from 1.5 hours to 3 hours. Built-in circuit provides thermal protection, overcharge protection, short-circuit protection, mechanical. and electrical protection against reversal polarity, and defective battery identification.

Note: Only use this unit to charge LiFePO4 batteries.

• 2.5 x 4 x 1"