AoA Dear All,
This is worth reading thread and information provided here is otherwise very difficult to find. I really appreciate and thank full to Mr. Talha.
I have a china made UPS 'Haisheng' brand name. Previously attached a battery AGS 120 ampere with it, it almost given me 2 years without any problem. Now it has reduced its backup time (30 mins or less), and i have purchased a new VOLTA NS 175 battery (1 week) and attached it in parallel.
Initially it gave me 3 hrs backup with 2 fans and 2-3 energy savers. But backup reduced within a week to 1 and half hr.
After reading this thread; i immediately removed the small old battery (AGS). I will arrange AMP meter and hydrometer and will post numbers to seek better guidance.
I have following preliminary queries/confusions:-
1. I have observed that even after a long period of load shedding, charging light gets off in 45 minutes. Therefore i assume that charging is not done properly. I shall get reading of volts at the time near to 45th minute of charging and post.
Confusion: at one place in this thread mentioned that it should be 12.8 v, and at other (many) places it is mentioned that it should be 14 volts, but that contradicts what is said in How can I tell if my battery is low and needs to... ā Yahoo! Autos that "
A reading of 12.66 volts indicates a fully charged battery; 12.45 volts is 75% charged, 12.24 volts is 50% charged, and 12.06 volts is 25% charged."
2. If i have AMP meter (as shown in your previous thread entry picture), than do i neet volt meter seperately. And if i buy ammeter (which is available at the cost of 350 at college rd) is'nt it not enough for both purposes.
3. If i want to perform flush, should i charge it fully before flush, or flush should be made on discharged battery (whats the difference in chemistry?).
4. Do they (pirwadhai dealer) provide Sulphuric acid in smaller quantities, or you have to buy it in bulk (20 ltrs).
thanks and waiting for reply.