You need to restore the battery back to at least 4VDC or the Battery Tender will fault and not begin recharging. This red-green blinking means you hooked up the battery "polarity" wrong. Still flashes red. Under normal use, I found my tender goes from red to green within 10 minutes after parking the bike after a ride, and connecting it. Then a second later the 12v light starts flashing. Usually when I use my battery tender, it pulses red/green until the battery is fully charged, then the light stays green. The battery reads 12.7 volts before attaching the tender. Solved! Leave the battery on charge until the green light is solid whenever possible. Battery Tender ® High Frequency SMT ... ¾ GREEN Flashing - When the green light is flashing, the battery charger is in the absorption mode of operation. Lenovo Ideapad 100-15ibd battery light blinking, not charging However, a red blinking light will also occur if you have completely drained the battery. Plugged in a regular battery charger, charged the battery, and away I went. I bought a new battery for my waverunner yesterday. Leave the battery on charge until the green light is solid whenever possible. Thoughts? and may be removed from the charger and used if necessary. The label states a red blinking light means "AC POWER APPLIED, BATTERY NOT CONNECTED PROPERLY." Disconnect the charger from the battery and check the battery voltage with a voltmeter. 1.800.456.6626 Holiday Hours Dec 19th - Jan 3rd Monday - Tuesday- 8AM- 4PM (MST) Wednesday - 8AM-2PM (MST) Well my battery on my bike died about a month ago during the winter, I ordered a battery tender recently and just received it today. The CHARGE LED will remain a solid RED color (not blinking) until the battery is fully charged. ... RED - When the red light is on, there is an internal charger malfunction or a battery malfunction preventing the charge program from finishing. Whenever. I'm not fricken using wrong am I? Fn+H. Used the battery for 2-3 more years. Then did the RR high output swap, and bought a new battery another year later. Remove the battery from the charger and then use a dry cloth or cotton swap to clean the metal contact terminals on the battery. The red light is lit solid. I put a new battery in a couple months ago. If the red light continues to flash, then either the battery voltage is to low (less then 3 volts) or the output aligator clips or accesory ring terminals are not connected correctly. However, a red blinking light will also occur if you have completely drained the battery. I showed a flashing red light, apparently the battery was not charging. So I hook up tender to my riding mower battery and the light is red, meaning its charging. Figured there was an issue with the battery so I put it on the RC51. GREEN FLASHING - When the green light is flashing, and the red light is on, the battery is greater than 80% charged and may be removed from the charger and used if necessary. 4. You need to restore the battery back to at least 4VDC or the Battery Tender will fault and not begin recharging. ¾ GREEN FLASHING - When the green light is flashing, and the red light is on, the battery is greater than 80% charged and may be removed from the charger and used if necessary. CTEK US 800 CTEK MULTI US 25000 MUS 7002MUS 3300MUS 4.3MURS 7.0D250S DUALCTX Battery SenseMXS 5.0 CTEK UC 800 Download a Troubleshooting Guide for CTEK UC 800 (90KB) No LED is lit when the charger is connected only to the batteryExplanation: The plug has to be connected for the LED to be lit.No LED is lit when the char So I attached the trickle charger to the battery terminals and charged to battery. SAFE AND SECURE Connect and forget with the Battery Tender® Junior! 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