There is no Tektronix provided external battery charger for any of our handheld video test instruments. These instruments are designed to charge their own batteries while plugged in using the AC power cord. Alternatively, these instruments are capable of using standard rechargeable batteries that could then be charged with a standard consumer battery charger. The TSG95, TSG601 and SDA601 each use 8 “AA” type batteries. The WFM90, 91, 90D and 91D each use 6 “C” type batteries. Learn more about signal generators »