I use this, it can charge 2 at a time. It also has a storage mode. LiPo batteries like to be stored at 60-80% charge.

Hanatora LCD Two-Way Charging Hub... https://www.amazon.com/dp/B0BLZFHXX8?ref=ppx_pop_mob_ap_share

I use the usb-c on this to charge in the car

USB C Car Charger, [Mini & Metal]... https://www.amazon.com/dp/B08HYQLH1C?ref=ppx_pop_mob_ap_share