Volta IPS1250 vs NS180

Assalam o Alaikum

Just bought volta ips1250 battery (hope its a right call). Just wondering about its information & if it is any better then volta NS180 as NS180 was Rs.11,000 and this one is 12,000. I can't seem to find its info like AH etc.

Also how much backup time should I expect while using it for 1 ceiling fan + 1 energy saver on it. (800 watt ups).

Also, is it normal if UPS takes 1+ hour to charge it after being used on just one ceiling fan for 1 hour?

Thanks in advance.

your ups power? VA or Watt

800 Watt