If the hardware and software are designed and tested for it, then yes.
Otherwise you may run into various issues caused by phone self-limiting power it takes from USB port. Some kind of negotiation needs to happen before the phone can safely raise the input power limits. If it needs more than currently allowed, it will just poweroff immediately, instead of satisfying the excess need from the battery.
Otherwise you may run into various issues caused by phone self-limiting power it takes from USB port. Some kind of negotiation needs to happen before the phone can safely raise the input power limits. If it needs more than currently allowed, it will just poweroff immediately, instead of satisfying the excess need from the battery.