Need a battery charger for the 21.6 volt battery

* Like a 12VDC auto (car battery) charger? No. It does not have enough voltage to overcome the initial surge (about 20-22 volts)
* If this is a Lithium Ion pack the it should be putting out a minimum of 16 Volts DC to a maximum of 21 Volt DC.
* The battery (or charger) also needs to monitor the temperature of the batteries, Charge voltage, and Charge rate. This is to prevent over charging and over heating.
* Just slapping a charger on any multiple cell battery pack will destroy it if it's overcharged (over heated).
* If you do have a charger but the charger won't recognize the battery then it may be possible to give it a "boost" with another full charged battery (has to be the same type). This is where you connect the batteries in parallel (Positive to positive, negative to negative.) Let it charge for a short time 15-20 seconds should do it. Try the charger again.
* 18V Battery restoral (with variable power supply); https://www.youtube.com/watch?v=4Gj4yFX58UU
* Using existing charger to fix battery (does not always work); https://www.youtube.com/watch?v=6GfPKg05ZIU
* If your using NiCad batteries then you will have to "Zap" the battery (This is a bit hazardous); https://www.youtube.com/watch?v=5B9rx7hoizk
* I think the earlier video guy had the right idea. Just turn in the bad ones and get new on (or at least Lithium Ion batteries)
Aloha, ukeboy57

18 volt battery charger will give out 20 to 22 volts. and drop off while charging. to around 19 volts. its just finding the right amps. as this is the most important part. these can very from 3 to 20 amps. some cheap chargers are 1 or 2 amps and can take up to 8 hrs to charge a battery. as an even a charger that says 18 volts at 8 amps or 6 amps should be fine. really depends on the manufacture setup.

If your model jump starts 12v batteries, it likely will be the same as this generic replacement charger on Amazon. http://amzn.com/B009DF2J52
I replaced mine and the open circuit (no load) voltage of the charger is from 18-19 volts. But it charged perfectly.

http://www.ebay.com/itm/Kawasaki-Battery-Charger-for-19-2V-Batteries-690072-New-/160992931850?pt=US_Power_Tools_Batteries_Chargers&hash=item257bed300a

or

http://www.ebay.com/itm/Kawasaki-691760-Class-2-Battery-Charger-Cradle-Base-7-2-24V-1-5A-/261150260383?pt=US_Power_Tools_Batteries_Chargers&hash=item3ccdc4bc9f

Ok, lets start slowly, do you have both a new battery and a new battery charger? If both attempt to use your old battery with the new charger. Also could be a bad charger or a shorted out battery...
Good Luck

OK. But I don't understand what the problem is.

AC adapter (Charger) is burnt out, by a new one.

Look at the old 'charger'.
Look at the label.

Input: 100 ~ 240VAC/50 ~60HZ.

100 to 240 Volts AC, at 50 to 60 Hertz. (Cycles per Second)

Output:
This is what you need to know.
What is the output voltage of the original charger?

Example;
Output: 19VDC @ 4.63A

19 Volts DC at 4.63 Amps. (Amperes)

Your charger MUST put out 19 Volts. (For the example)
It WILL be DC electricity, so don't worry about that. (Direct Current)

[Your 'charger' is more than that. More than a charger for the laptop battery.
It is also a Converter. It converts the 100 to 240 Volts of Alternating Current, (AC), into a low DC Voltage.

Plus it charges the Battery, WHEN needed ]

Post back in a Comment as to what the exact query is.
Regards,
joecoolvette

Check fuses 8, 19, and 21/22. You might also try swapping the auto shutdown relay with another similar relay. Your wiring diagram is pasted below.

Usually, the battery is removed from the tool and inserted into the charger base. Hopefully, the charger has not disappeared also. Good luck!

John Do the red lights blink or steady? this indication on the joystick usually means low batteries. Now this could be caused by bad batteries or a bad charger. On the jazzy if you have an on-board charger the light on the charger will come on green when the batteries are fully charged. If you can look under the rear of the chair you will see the charger and can tell if the light is green with the charger still plugged in after charging overnite. If the light is not lit then you probably have a bad charger. If you have a digital volt meter put it on dc volts 200 volt scale and plug the leads into the two outter charger port holes located under the front of the joystick. Your battery level should read 24-26 volts after charging all nite and with the charger plugged in up to 30 volts if there is no change in the voltage from charger plugged in and not plugged in then the charger is bad. You can then look to purchase an off-board charger that plugs into the joystick charger port to charge your batteries. If your battery readings are lower than 21 volts even after trying the new charger then you will have to replace the batteries. You might try to find someone in the local area that has an off-board charger you could borrow to see if you can get the batteries to charge. This will help you find out if the batteries need replacing. Hope this helps

sounds like my charger, not making good contact

wiggle the battery around while pushing down and you can probably get it to make contact

sounds like you just need a new charger