Eaton/Tripp-Lite have a few Li-ion models: https://www.eaton.com/us/en-us/products/backup-power-ups-surge-it-power-distribution/backup-power-ups/lithium-ion-bat

Eaton/Tripp-Lite have a few Li-ion models: https://www.eaton.com/us/en-us/products/backup-power-ups-surge-it-power-distribution/backup-power-ups/lithium-ion-batteries-/single-phase-lithium-ion.html https://www.eaton.com/us/en-us/products/backup-power-ups-sur...