We previously tested the original design of the Cordless Advanced Waterpik, and however We've not formally examined the new edition, we note that it now has a chargeable lithium ion battery and comes with a magnetic charging cable which can be plugged into a USB port. Just one Amazon reviewer https://retractablewaterblaster85162.widblog.com/81326321/the-single-best-strategy-to-use-for-retractable-water-blaster