Romario wroteAfter 5 years of heavy use my pc's ups died (my brother left it on all night and no electricity) it lasted 2 years more than it expiry date. Then i replaced the internal battery with a similar one and same power. But the new one is weak it last 5min when just the dsl modem on. But this time i forgot the ups and the modem on all night (dont tell anyone :D) so now it last 10 second. Do any one knows any technique to repair it?
The way I see it, if the old and new battery have the same current rating, then your new battery is faulty, it should last up to six hours when newly purchased. Check if it has an expiration date on the sides or the bottom. Also, if you can provide me with the name of the battery and rating on the old and new batteries, I'll be able to tell if the new battery is indeed a suitable alternative or not.
Also I want to ask, on the first try of the new battery, how long did it last? If it did last for 4 to 6 hours, then there might be a problem with the charger and not the battery itself.
shant wrotedo not waste your time looking for a 9 amp one as you wont find it
Not true, there are 2 I know of, the
HW 12V 9Ah at Katranji, and the
Yuasa LP12-9-F1 12V 9Ah battery from the official distributor "Mideast Energy Solutions Offshore", "Mideast Power Systems" division. Of course the Yuasa is a better battery (lasts about 1 to 2 years longer depending on usage), but it's more expensive.
shant wrotedo not try to replace your battery greater than 9 amps as it will result frying the ups circuit
Not entirely true, every lead acid battery charger found on UPSes or any other system can tolerate up to 0.5A difference in current. Up to 0.3A makes no difference for the battery, but anything higher than that can affect the life of the battery.
As a general rule, a battery should not be used immediately after purchase, even if the supplier pre-charges them. This is because even when pre-charged, they tend to loose their charge after a while. A charge cycle of 6 to 10 hours is recommended for 12V 7Ah batteries. Also, every 6 months, try to entirely discharge the battery (until it reaches about 2 to 3V) and recharge it. This will allow all the lead acid material within to be activated and not dry out, causing the battery to either get defected or lose a couple of years from it's life.
