The HiFiMAN TWS600 is an interesting true wireless stereo headset from HiFiMAN. Selling for a very reasonable $99, it is one of the cheaper sets available from a respectable brand. The TWS600 promises a battery life of 5.5 hours for the in-ears and 38.5 hours if you take into account the battery capacity in the carrying case.
The TWS600 supports Bluetooth 5.0, so in terms of compatibility, it should have you covered for a long time. Unlike the ANANDA-BT, there is no support for LDAC or AptX.
Like other HiFiMAN products, the focus of this headset is sound quality for the listener; the microphone design for calls is secondary. HiFiMAN is using their newest nano-coated driver technology tuned quite closely to their usual target curve.