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Do I have a battery or charger problem.?

I have a charger that gives 4 volts to the 9.6 volts battery, when I push the red button, it increase only to 6 volts, but shutt off wihtin 15 seconds. and the battery got only 4 volts charge.I push the yellow button and get only 4 volts from the charger. Is this normal, or the voltage must be 9 volts ?

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I would, first, suspect the battery. The fix is easy: get a new battery. If it takes the initial charge, you have your answer, and shuld buy another battery. If not, replace the charger.

Since the odds are the battery is at fault, you're back in business. If not the battery, a new charger gets it done. Main thing, you needed two batteries ennyhoo, so if the battery change works, you're where you shoud'a been in the first place. mw

Posted on Apr 13, 2015

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Posted on Jan 02, 2017

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rowdy45176
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SOURCE: 18 volt ryobi battery charger...green & yellow lights come on wha

talked to Ryobi and they are vague. It can either mean that the battery is bad, or the charger is bad and another one that maybe the contacts of the battery are dirty or not seating fully in charger. What I would look for in this instance first unplug the charger and look into charging slot to make sure the terminals of the charger are not bent and they come out into the cavity where battery would go. If not gently pull terminal into opening and retry. Sorry I couldn't be of more assistance

Posted on Dec 31, 2008

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SOURCE: Some Ryobi 18v batteries charge, others don't.

Had the same problem with some makita batteries, Was going to throw them away so decided to take apart and see what was happening. The are made up of 1.5 volt cells soldered together, found that many had .9 volts or less and others had 1.5 or more. This means that some of the cells had gone bad (probably due to lack of chemical reaction). Found that if I collected all of the 1.5 volt together could charge just fine. Problem is it is very hard to get them all soldered back together and even harder to enclose them. If a mfg. could come up with some way to change cells individually they could make a lot of money and save us a lot. So the answer to your question is buy you at least one more battery and recycle your old one.

Posted on Mar 28, 2009

frankzen
  • 19 Answers

SOURCE: Jobmate 18 volt chordless drill charging

About 60 minutes...max 90 minutes. Do NOT leave it on the charger for hours and hours...that just cooks the battery.

And switch regularly between the two batteries...else the one that doesn't get used will die.


Posted on Apr 04, 2009

jyackle5
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SOURCE: My new Blackmax drill battery charger does not put

You can find a repair center on the link below. You just need to put your zip code in to find the nearest one to you.

http://www.blackmaxtools.com/customer_service/service_center_locator

Good Luck

Posted on Jun 13, 2010

rowdy45176
  • 2176 Answers

SOURCE: hi i have a makita charger that flashes red and

there is a problem with the charger and given the age I would take it to an authorized dealer and get a replacement. If you give me your general area I will try and locate one close to you. Please before voting if you need more assistance let me know. Thank you

Posted on Feb 02, 2011

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2 Answers

Okay, I'm working on a scooter for my nephew that originally came with (2) 12 volt 12Ah batteries minus the charger. and I know I need to replace them with (2) batteries of the same 12 volts and lets


not exact, to charge apropiate needs 10% more than nominal voltage. if not, will not charge the batteries.
And the charger its very important because you can over charge the battery.An example,if you have a 12 Amps Batteries each one if you put it in series will be 24 Volts.at parallel conection will be 12 volts but the double of Amps.
At serial connection will be 12 Volts the amps will be the same but the volts will be 24.

The charger at 12 Volts must be 13.8-14.5 DC Volts and divide the Amps in Hours.
The charger at 24 Volts must be 26-28 Volts. to charge well.

The charger for 12 amps batt example must charge 2 amps per hour at 6 hours = 12 Amps.(2 Amps Charger by 6 Hours Charging= 12 Amps.(Fully Charged.
3 Amperes Charger needs 4 Hours to charge 12 amps Batt.
5 Amperes Charger needs 2 Hours charging an a quarter
All of this is at DC Current.

Luck.

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first of all do you have 3 or 4 batteries your cranking battery is not to be wired into this 36 volt if you have 4 batteries you have 3 for trolling motor and 1 cranking battery look on your charger see if the banks or numbered 1 2 3 4 .... you got to find what battery is # 1 depends on how they hooked in series if you hook charger on wrong battery most the time a red light comes on telling you wrong battery move wires till green lights come on all batteries.# 4 goes to cranking battery if you only have 3 batteries you don't have 36 volts you have 24 volts and a cranking battery if so # 3 goes to cranking battery

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I know you can get these on Ebay. Also most NI-MH 9 volt battery charges will charge this battery pack. You can use a 9 Volt Snap Battery Connector with Alligator Clips to bridge the connection between the battery pack and the NI-MH 9 volt batter charger. This is how I charge this battery pack now. You can probably get the 9 Volt Snap Battery Connector with Alligator Clips at a radio shack or on Amazon... as well as a NI-MH 9 volt battery charger.. don't hook up the leads backwards :)

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I cant get my power chair jet 3 to charge batteries are good


Hi valentin 201
I have owned my own business for 3 years and have been working on scooters and powerchairs for 15 years. . In the future give as much info about the scooter as possible.

1. load test the batteries even if you think they are good, check anyway. Sometimes even new batteries won't hold a charge.

2. Your charger on the powerchair must have enough volts to open the charger inhibitor. That is, the charger won't even start up if your batteries are low. Both batteries need to have at least 20-22 vdc.

3. Some chargers have a 3amp fuse check that and repace if needed.

4. With a multi meter set on dc200 check your batteries. Red on one battery and black on the other. Check to see what you get for voltage. If no voltage reverse the lead wire to the other posts. Once you get a reading of 20+ volts watch the meter and plug in the charger, it should increase the volts on the meter. if not the charger is bad, replace. Charger should be 24-31 volts to be a good charger.)

One of these sugestions will fix the problem

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I have a Shark Clean Sweeper and need to replace the 7.2v charger. Where can I find this.....I'm running into blank walls.


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I re-built my custom softtail ('00 Evo-bad oil leak). Now, when I try to start it, the Jackshaft engages the drive and "sticks" in place. It also makes a noise like a "dying battery",...


Ok, it sounds like the proverbial "bad battery" to me. Although you say you measure 12 amp (I think you actually mean volts here) this doesn't tell you the condition of the battery. You can take a 9 volt battery that will not run the device it's in and measure it with a volt meter and it will measure 9 volts most of the time. Now, when you put a load on that battery, the voltage drops to almost nothing. This is because your volt meter cannot "load the battery. The same happens with your bike's battery.

Take your battery out of the bike and take it to an automotive parts store, Ask them to "load test" the battery. They'll charge the battery for a while and then put a "battery load meter" or "carbon pile" machine on it and put a load on the battery exactly like your starter is doing. Only now, you have a meter on the machine to show you what it's doing. You can do the same thing using you voltmeter. Connect it "across" the battery, red probe to positive, black probe to negative and press the start button. If the voltage drops below 10.5 volts, your battery is no good.

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Need to increase voltage on powersuply


Hi John.
No idea why your post is under monitor problems ???
I figured you need an adapter mod for a monitor !! SO don't kill my ratings since this is not my area of expertise, but I can try to give you some input anyway, not so much a solution !!.
I would NOT recommend altering a 12 volt adapter for charging a battery especially if it is a standard ac adapter.. You may get it to give you 13.8, but your amps may be wrong.
Battery charger depends on type of battery also. Don't know if you are using NIMH or Nicad or acid based ?
The differnt style batteries use different type chargers. Wrong charger will burn up a battery or blow it up !!
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I would recommend looking here
http://www.powerstream.com
They have all those goodies and may give you an idea. for what I think you are doing.
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Battery will not charge


I found this while searching to find an answer to solve my problem. It worked! Some say that it took them about 20 times... it took me about 7. Be patient and just keep trying! Hope this helps!



My NP 20 gave me the flashing red light of death and I got Casio to replace it. Then I had the same problem with my second NP 20 so I dug around for a way to fix it and I found the following advice on a site called FixYa. It worked instantly and I didn't risk ruining my battery.
ylu1 writes:
I had the same problem as this.
what i did was...
i kept putting the battery on the charger then took it off as soon as the red light came on.
i did this about 6 times.
doing this puts a bit of charge in the battery each time before the charger starts to flash.
after the battery as got enough charge in it it can start to charge.
hope this helps.

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