How to set or replace 12v 7ah with 12volt 26ah big battery with computer ups for long backup

Hello, friends here I show you that how to change a 12v 7ah ups battery with 12v 26ah big battery. If you don't seen the unboxing video of the big battery please click on link- Exide powersafe plus 12volt 26ah batt...

And if you dont saw my setup video please click on the link to see- Mini inverter system using computer u...