I've circulated this question before but am still not 100% sure of the answer.
I have 2 generic UPSs both rated at 1400VA
One has 2x7.2Ah Batteries, the other has 2x12Ah Batteries.
I would like to replace all with 20Ah batteries.
So there would be a large increase in Ah for both the UPSs.
I know that this is possible but there are a few problems.
1) I contacted the manufacturers of similar UPSs and they said no, you must use the same battery or it will burn out. I just think they want me to buy a bigger UPS, which I will not.
2) Apparently if you you use a higher Ah battery, it will recharge slower so to fully recharge it will take more time.
The problem with this is that if it slows down too much there will be hardening of (forgot what) on the battery inside and it will reduce the life of the battery.
Now the thing is that the 20Ah battery will give me more life, which is what I need, but I don't want to go out and waste money on batteries which will just blow my UPS or which will die within a few discharges.
I really need some definite answers from people in the know here.