Yes and No. The V90 handheld test platform uses a smart USB-C PD charger and cable, capable of 15V / 3A (45W). Although using any other common (older) 5V / 1A USB charger won't damage the unit, it may not work, take longer and/or not charge in full.
The official recommendation is to use the smart USB-C PD (Power Delivery) charger and cable that VeEX supplied with the product. Both the charger and cable are capable of handling up to 45W (15V @ 3A) and have the required PD communication channel. The USB-C chargers shipped with VeEX products may come with permanently attached USB-C cable, to avoid cable mismatch or misplacing them.
The use of any other charger or cable are not covered by the warranty.
However, if you forgot to pack the charger supplied by VeEX, or misplaced it, you may check the specs printed on your trusted modern smartphone's or tablet's USB-C charger. They most likely have smart USB-C PD chargers. They may not specifically state "USB-C PD" or "PPS" (programmable Power Supply protocol) compatibility, but they may list all the different voltages and currents they support.
About USB-C PD: USB-C chargers can support different Power Profiles, offering voltage levels from 5V to 48V and current capacities from 3A to 5A. Depending on the USB-C power supply and USB-C cable ratings, they could supply from 15W up to 240W. Before the charging starts, the supply unit (source) and the device (sink) use a communication protocol to agree on the voltage and current required.
While the use of USB-C chargers is generally considered safe, it is important to use high-quality, genuine chargers and cables. Using cheap (no brand) or unreliable chargers and cables could lead to major risks, such as overcharging, overheating, battery damage, explosion, and/or fire.
Verify that the USB-C charger supports 15V / 3A. If so, there should present a reduced risk and you could consider using them, at your own discretion, for an emergency. If the information printed on the charger is vague or confusing, don't take any chances.
Individual USB-C cables are more difficult to identify, since they don't have PD markings to confirm whether they would allow the test set and charger to communicate their power settings and requirements. Also, the construction quality of no-brand cables is very difficult to judge.
USB-C charging works differently than traditional USB-A charging, using a different type of cable and port to transfer data and power. The charging process involves constant communication between the device and the charger, allowing the charger to adjust its output to meet the device's requirements.
Older USB-A chargers, and their USB-C converter cables, definitely don't support PD communications, so they should be avoided. They are often limited to 5V and 1A (some may go up to 3A). They won't damage the test set, since the platform itself will adjust to the available source. However, if the battery is low, it may not charge the test set while it is being used, as it keeps on discharging. The test set must be OFF to get some charge, but it may not finish charging to 100%.
WARNING! Using older 5V / 1A USB-A chargers, while the battery is low and the test set is being used, may bring the battery to a deep discharge level, degrade its performance or cause permanent damage. In this condition, the battery status icon may not display an estimated Charging Time, since the adapter cannot provide enough power to charge the battery and operate the test set at the same time. Turn the test set OFF!
USB-A chargers with 5V / 1.5A capacity may charge the test set very slowly, while the test set is being used. The Charging Time indicator may display the best-case scenario. However, during active use, charging may take longer than predicted or stop charging (no estimate time displayed) before reaching 100%.
Test Set May Stop Charging Before Reaching 100%
If a different USB-C charger is used, with lower capacity specifications than the one supplied by VeEX, the charging time could take a lot longer.
For safety reasons, if the test set's Li-Ion battery pack doesn't reach the >98% charge level within an expected timeframe, it will stop the charging process. In such state, the battery status icon may show that the charger is plugged-in 
, but it will no longer display a Charging Time estimate. At that point, depending on the capacity of the charger, the test set's battery may remain at a certain percentage of charge or start discharging if the supplied voltage and current are not enough.