If you wish to speed up the recharge time you will need to aquire a seperate charger for the 100 AH battery..make sure you use a blocking diode..to keep the two chargers seperate...if you need help on a diagram on how to do it let me know
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Check battery voltage using Volt meter=> it should be about 12.6 to 13.8 vdc.
Pull the battery out... checking the deforming at the case ..such as "swelling"... if yes .. replace the battery.
Replacement battery is about 10-20 dollars on e-bay (watch for shipping charge and size. and terminal connection sizes )
The average life of battery on UPS is about 5-7-10 years wi)th UPS plugged in (Charging
One I had my local Autozone checked my 12 VDC -8 AH ... ask them to set CCA at about 100 AMP...
for 12 VDC -14 AH ask them to set CCA about 200 AMP.
For a 12 VDC -75 AH (group 24) they set the load on their tester at about 700-900 CCA.
You can also buy a manual battery load test at Harror freigt tool for about $20 US dollars (On sale)
Hi, I have this ups as well, My personal adjustment with this ups, is I have installed 6 external Ags Number 120, 15 plates per battery, in pairs. And its working fine on my end , and yes ups is able to charge them all without over charging or any other problems. My ups Already has 6 internal batteries bank installed, attaching these external batteries has increased the backup time.
Yes, is the short aswer to your question. The battery should charge as you use the ups. If they don't then its likely the battery/s have failed. Lead acid batteries do not like being left discharged for any length of time. In a motor vehicle the battery gets a bit of shaking around, but in an ups they don't. If not used and left discharged, the plates quickly sulfate up reducing the efficiency to nearly zero. Test and replace any battery that cannot support a test load, such as a bright12v light or a 12v soldering iron connected to it. The length of time required to charge the battery/s depends on their capacity (in ampere/hours) and the charging rate. A 14.4 amp/hr battery charged at say 1 ampere will take 14-1/2hrs to charge.(just as a sample)
When batteries discharge during ac power it could indicate charger failure or micro failure or some other wierdness. makers do not release cd info. The best thing is.. buy another one as they can be very difficult to repair and of course they are dangerous, batteries are always live, waiting to bite you. I have worked on and repaired such circuits as the AP 200 series resonant converter and selling and hiring UPS for a long time. Beyond the simple easy checks youhave done the time it takes to understand how they work can better be used.