Pronto 91 fully charged batt but only gey 3 flashes off red light

Throw away

why did you change the batteries, did you verify that it wasn't the charger in the first place, sometime the charger will appear to charge but actually isn't. put a meter on one battery then plug in charger if voltage goes up charger is good if not look for loose connections and or bad charger.

Phil the red means battery is low and the green is a speed limit code because of the low battery if you have charged your batteries and you still get the red then you need to check the charger after charging all night does the yellow light on the charger turn green? if when you first plug in the charger if the red light is on and the other light is green then there is a problem with the wiring or connection to the batteries from the charger and you aren't charging the batteries. if when you plug the charger in and you get a red and yellow light then the charger is working but you don't ever ge a green light and the battery level gauge is still showing red then you need to replace the batteries Hope this helps

Charger flashing red indicates the battery is still not full and is in the process of recharging.
Red light steady indicates your battery is fully charged and ready to operate with your Coolpix 5000.
When red light is off it indicates there is no battery inserted or the charger is not pluged in.

The batteries are low and need charging If after you charge and you still have the single red light then you need to replace the batteries

Flashing red light usually means low batteries. Check the batteries after charging all night with a volt meter through the charger port you should read 26-24 volts dc. If you get a lower reading and you are sure the charger is working correctly then you will need to replace both batteries Hope this helps

I really don't have any idea as to what you're talking about here other than a battery and maybe a charger. Seems as if you're saying that you have a 12 volt 1.5 amp automatic battery charger connected to a 12 volt, 8.5amph battery but the red light on your charger is blinking. The blinking red light indicates that the charger is not seeing a proper connection such as crossed polarity connection or simply a poor connection. You say that the battery voltage has dropped from 12.5 volts to 9.1 volts with the charger connected. If this is the case, the battery is badly discharged and the charger is not charging the battery for some reason. The charger may be bad but check the connections to make certain they are correct and good. If they are, I'd replace the charger.

Good luck
Steve

on my m51 the lights on the charger are red and green the green is flashing what is this telling me.also should i have the controller on when i plu in the charger my chair i 6 years old battery replaced 2 years ago

Clean contact points of both battery and charger with q-tips dipped in rubbing alcohol. This solved my problem with blinking lights and not charging of the batteries.

I had the same problem. 1 of four way's can fix it. #1 Put a batt. that has a little charge in that flashing spot 1st. and see if that works. #2 put the batt. in that flashing slot first and then in the 1st slot, If that did'nt work, #3 Put Batt. in backwards for 1 sec. in and out fast. and I do say very fast, In that flashing spot. #4 buy a new one. The one that fixed mine was #1 and it stoppppped flashing, The order I put them in was - 3-1-2-4 I put in #3 batt. first, it was the one flashing And it worked, You may have a bad batt. or it's on it's way out, but try It. worked for me!