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Check that the battery is not faulty, if it is OK then check that it is charging looking at the battery voltage from the alternator. The voltage should be 14v over the nominal 12v. Then you have a wiring or alternator issue.
Try first checking all the connections, then if you can try to use a different battery just to make sure that the battery is still working fine and check also the starter ,becase this can be a problem also with the starter solenoid that may need repair or replacement...
Check the charging voltage if you know how to use a multimeter .
if it is 13 volts then it is ok.please tell me how old is your UPS and battery.if the battery is 2-3 years then it may need replacement.
after checking the charging voltage charge the battery or some 6-8 hours promptly maintain charging .
Check the voltage you are getting from the generator on the battery terminals with help of a multimeter. Check the continuity of the harness from alternator to the battery terminals. If the voltage levels are below 13.0V and harness is OK, then get your alternator checked. (it may need replacement)
disconnect one terminal of the battery then measure charging voltage betwen +ve and -ve it should be 13.8vdc for one 12v battery if charging voltage is not present then battery is ok then connect ammeter to measure the current in Ampere .take care it should be in series if current if no current then battery must ok opern the ups there is a charger transformer measure i/p voltage to transformer if not present then check i/p path if present then check diodes at o/p of charger if faulty replace it also check capacitor and regulator ic if faulty replace it your problem must be solved
if all cables on battery are clean and tight, then most likely it is the alternator putting out a low charge. test the alternator it should be at least 14 or a little more when running. 12.5 to 13 when off. if alternator is ok, then check all wiring from alternator to battery, and make sure the battery ground is ok!! best of luck carl,
If the battery is working fine then the issue is definetly with the phone, so you need to check its connection where the battery touches the points of metal tip, or you can get the same checked with the service center as they will be able to check from the phone from inside also, opening it yourself will end up the warrenty
First check the battery terminals are clean and firmly attached- if terminals are ok the battery may be either discharged or faulty.
Get the engine started by jumping from another battery- then check battery running terminal voltage is approx 14.5 volts with load such as headlights or heater fan on.
If voltage ok and battery still doesn't hold charge, the battery is probably faulty - replacement required.
I tried to find how old that model is but had no luck; this message may mean that the CMOS backup battery, normally a small 'coin' cell, needs replacement.
That message says that it can't remember who and what it is and that happens when the battery is depleted.
Check you user guide about replacement of that battery; it should be a DIY job.
The battery will cost <$10 US even if you stumble across a crook selling them. Wholesale, they are about 20-30 cents.