Karcher VW5 charges, all three green lights. Have 2 batteries, both fully charged. Press the ON button on the handset and 3 green lights light up then go out and a 1 red light flashes. Unit is dead.

SOURCE: no 'green' light on bacl of my 'old' Vivitar 285

Then I'd say it's a reasonably sure thing that the green light is just burned out, The lights are supposed to be off at first, then red when there's a partial charge, then green when there's a full charge, then flashing between red and green when the "battery saver" kicks in. If you're seeing off, then red, then off, then flashing red, then that means everything in the charging circuit is working perfectly, there's just no green light.

SOURCE: Dell latitude D600 battery charge light flashing

That usually indicates battery is beginning to go bad. Eventually it will not hold a charge and will need to be replaced.




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SOURCE: red L.E.D light won't stop flashing

Shaving head check indication After two years of use the red shaving unit symbol î will flash for 30 seconds during 7 shaves to indicate that you should check the condition of the shaving heads. This indication is based on an average shaving time of 3 minutes per shave. When the shaving head symbol flashes, all other symbols and lights are out. When the shaver is switched off, the shaving unit symbol disappears. When the red shaving unit symbol starts flashing, you should check the shaving heads for possible damage. If the shaving heads are damaged in any way, they must be replaced in order to obtain optimal shaving results

SOURCE: Battery Charge light flashing 4 red one green Dell Inspiron 9200

usually, its an indication that the battery is nearing the end of its useful life. you can try to use another battery to isolate it further. If the same thing happens with another battery, chances are, the mobo is failing. Flashing the BIOS can usually help with battery issues. If another battery works fine and your computer is within its first year since you bought it, you can request a replacement battery from Dell

SOURCE: why my 28v doesn't fully charge

One or more cells of the battery have gone bad. The technique of measuring the state of charge of the battery is VERY limited.

I would recommend letting the battery cool after charging... THEN in a day, charge it again without using it. Do this for several days and see if the battery improves. If not, time for new battery.

DO NOT discharge these batteries beyond the point where the tool starts to slow down. You will reverse charge the weakest cell from the ones still deliveing power and the reverse charge will permanently damage the weakest cell.