UPS

• CyberPower CP1500EPFCLCD https://olmi-connect.ru/shop/ibp-i-stabilizatory/istochnik-bespereboynogo-pitaniya-cyberpower-cp150/
• двойное преобразование

https://www.cyberpower.com/ru/ru/product/sku/cp1500epfclcd#downloads
https://baloto.ru/rbp_cyberpower/16/21/ - замена аккумуляторов

Voltage: 12v
Capacity: 7ah @ 20Hr
Terminals: T2 6.35mm Spade
Chemistry: AGM, VRLA, Sealed Lead, Pb.

The dimensions of each battery in this pack of two is below, it should fit pretty snug in the UPS:
Length = 151mm or 5.94-inches
Width = 65mm or 2.55-inches
Height = 94mm or 3.7-inches.