Question about Ctm HS-2800 Power Wheelchair

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Will higher amp hour batteries damage the motor on my CTM HS-2800

I have a CTM HS-2800. I can't find the correct amp hour batteries. can I use a different ah rating and still get the performance from the power chair without damaging the motors?

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Absolutely not. Higher amphour batts don't put out more voltage, just more voltage longer.
The 2800 takes U-1 gel cell batts that run about 33 amphours...good for about 12-16 miles. You might be able to fit bigger batts in it, but measure first before you buy...gel batts are pricey.

Posted on Jul 09, 2009

  • oregoon Jul 11, 2009

    Agrajag's response is not correct. The batteries are deep-cycle STORAGE batteries. They produce 12 volts of DC current. A 12 amp-hour battery puts out 12 volts to power the mini scooter, a 72 amp-hour battery puts out 12 volts to power the heavy-duty chairs. The difference is the storage capacity of the battery, not the voltage output. Think of it as the difference between a 5 gallon gas tank compared to a 40 gallon tank for two identical cars. The car with 40 gallons will go farther than the little tank, but not use more gas and go up in flames.



    The motors on the 2800 only draw X-amount of current, which is controlled by the power controller to prevent the motors from burning up. The power control module on teh 2800 is a Shark DK-PMA01 made by Dynamic Controls, and automatically limits the maximum output to the 2800's motors to 10 amps, which is their rating.



    So, you can put any size 12 VDC sealed, gel-acid, deep-cycle battery in any powerchair or scooter, as long as it fits, and the only thing that will change is the distance you can go before needing to "fill up" again.

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More AMPS, more time riding your unit. But the HS-2800 can only accept the U1 batteries 12v 36ah amps. Bigger batteries will not fit because there is a lever going across from left motor to right motor.

CTM Tech. 909-590-1388 x115

Posted on Mar 14, 2016

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No amp/hour ratings are a mesurement of time. 1 amp for 30 hours or 30 amps for one hour, same just a rating of the battery, the motor will draw what amps it needs reguardless of the rating, more amp/hours = more run time, that said get good batteries, and sealed gel or glass mat NOT a car wet cell battery, a company called MK makes some good ones and will have the exact size dimensions and rating

Posted on Dec 25, 2012

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Not recommended.  The controllers on power chairs are commonly rated only for the amperage of the batteries you got with the chair.  If you put in higher amp batteries you run the risk of burning up the controller.

Posted on May 27, 2009

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2 Answers

Will not charge when plugged in to electricity


1) Order a new charger. 24 volt 3-amp.
2) Replace the batteries if they are over a year old. Usually two each size U1 gel\AGM or SLA 12volt 34amp-hour.

Nov 01, 2013 | Ctm HS-2800 Power Wheelchair

1 Answer

Intermitant drive power on my ctm hs 740 mobility scooter


The problem is going to be your motor. After extensive usage, the motor will give up internally and some times it will burn and melt the possitive/negative cables at its housing and it will give you issues with the batteries and the module.

Luis CTM: 909-590-1388

Oct 29, 2011 | Ctm HS-2800 Power Wheelchair

1 Answer

Will not move, lights come on


do you have your D/N Lever in the correct position? (D) Do you hear your motors run ingage? if yes, then the Lever its not engaiging the motors. Do you have the charger attached when you are trying to operate the unit? No power cord should be attached.

Call me for technical assistance.
CTM HOMECARE PRODUCST
lnavarro@ctmhomecare.com
909-590-1388 x115

Feb 01, 2011 | Ctm HS-2800 Power Wheelchair

1 Answer

We have a CTM HS-2800 power wheelchair that has 2 red, 2 green & 2 yellow lights that come on flash 8 times and then go off. What might be the problem when this happens?


You have a module problem:

Evaluate your batteries. 12v Single or 24 together.
Flash codes:
1. Stall Timeout, Joystic out of neutral
2. Battery Voltage too over 32VDC hi or too low under 17VDC
3. Left motor Fault
4. Right Motor Fault
5. Left Brake Motor fault
6. Right Brak Motor fault
7. Shark Control Module Faul
8. Power Module Faul
9.Shark Module Faul

Nov 24, 2010 | Ctm HS-2800 Power Wheelchair

2 Answers

HS-2800 Power Chair is moving extremely slow....


Poor batteries or very weak batteries Also make sure you have the speed control to full in a safe area and try it there. But my bet is on the batteries Good Luck

Nov 15, 2010 | Ctm HS-2800 Power Wheelchair

1 Answer

Ctm hs 2800 turn on key light come on and blink 7 time then go out push joystick foward motors kicks in and out and lights blink 7 times and then frist red light keeps flashing


1. Stall Timeout, Joystic out of neutral
2. Battery Voltage too over 32VDC hi or too low under 17VDC
3. Left motor Fault
4. Right Motor Fault
5. Left Brake Motor fault
6. Right Brak Motor fault
7. Shark Control Module Faul****this will be your problem***
8. Power Module Faul
9.Shark Module Faul

Contact me Direct 909-590-1388 x115 CTM HOMECARE OFFICE

Oct 31, 2010 | Ctm HS-2800 Power Wheelchair

2 Answers

CTM HS 2800 2 yellow lights flashing after new batteries install


As her to explan to you how she recharges the batteries and how often she recharges the batteris, make sure she is following the owners manual. http://www.ctmhomecare.com/PDF/Owner_Manual/User%20Manual-2800%202800.pdf Explan to her the batteries can NOT Overcharge, Also trace the wiring for breaks or disconnections.

Sep 04, 2009 | Ctm HS-2800 Power Wheelchair

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