Just to chime in on this topic, I got a Sonoque C5PL about a year ago. Works OK for what it is (clunky app). Unfortunately battery failed by end of year 1 despite minimal usage in clinic (I'm talking about once a week maybe). Battery is usually charged to 70-80% and kept off charger otherwise. Problem is once battery starts dying, the probe barely lasts a day on standby after a full charge. It became unreliable to do ultrasound injection since I don't know how much juice might be available until I turn it on.
Was able to ship it back for a warranty service... supposedly battery was swapped but big lack of communication. I constantly had to probe them to see if the item is ready (no ultrasound for 2 weeks already).
Take home after this experience is don't invest in a portable probe with built in rechargeable battery because it will need replacement much sooner than a wired version.