Looking for a handheld, battery-powered oscilloscope?

Here's an independent review of the Siglent SHS series: 
https://youtu.be/0nnxt01sTOc

http://www.saelig.com/category/siglent-handheld-oscilloscopes.htm?Screen=CTGY&Category_code=siglent-handheld-scopes

The SHS806 is portable oscilloscope with features normally found only on expensive bench-top instruments.  It is ideally suited for field application circuit measurements, electrical debugging, education, scientific research, and quality control.  It combines a sophisticated 60MHz oscilloscope, a 6000 count multimeter, and a waveform recorder in a portable unit with a bright 5.7” color TFT LCD screen.  With a bandwidth of 60MHz, it can measure single channel signals at a rate of 1GSa/s or both channels at 500MSa/s, with a 2Mpt sample memory to allow storing, replaying and zooming in on measurements.

The built in data-recorder has up to 18 hours recording time, while the Meter TrendPlot can record multimeter measurement data for as long as 6000 hours at 0.05Sa/s. The Multimeter measures DCV, ACV, DCI, ACI, Resistance, Diode, Capacitance, and Continuity.

Input voltage: input voltage through BNC is up to CATII 300V and CATIII 150V Standard probe: 10X CAT II 400V Optional probe: 10X CAT II 1000V and 10X CAT III 600V Oscilloscope and multimeter safety to CAT II 600V and CAT III 300V.