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Thread: MK Battery issues?

  1. #31
    You need the MK group 24 with screw terminals: http://www.monsterscooterparts.com/g...-terminal.html

  2. #32
    Senior Member landrover's Avatar
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    One thing that I found interesting when plugging my chair into the charger after the controller battery gauge is flashing one red light, is that the levels on the battery charger often read at 85%, and rarely as low as 50%. I'm not sure what this might mean, except perhaps that may be the battery charger may not be accurate?

  3. #33
    I believe that the controller battery life remaining can be set in the controller software, I'm swapping from LA ti LiFeP04 batteries on my off road wheelchair and I'm certain that the engineer doing the swap said he could alter the red/green battery life remaining for the new batteries as they were slightly different. I've also got a power consumption meter which shows watt/hours, I reset it after every charge and never let it go above the limit I was told could damage batteries.

  4. #34
    Senior Member landrover's Avatar
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    Had battery issues again on my recent trip. Numotion used generic 34's. Any idea how longer the MK 24's would last?

  5. #35
    MK has had some quality control issues, not sure if that's been resolved. But if I were going to buy batteries that's what I would buy. I believe they have a one year replacement warranty.

  6. #36
    NuMotion doesn't use a generic battery its a company in Northern Cal that just make power chair only batteryies.

    MK just are not working like they use to and losing market share they are cutting cost that are impacting performance.

    Landrover the bigger issues is make NuMotion replace the batteries with 24s vs 34s the difference is 9-10 miles with 34s, 15+ with 24s.

    Make sure you charge them every day 8 hours+

  7. #37
    NuMotion doesn't use a generic battery its a company in Northern Cal that just make power chair only batteryies.
    Don't believe this is right, https://www.numotion.com/about-us

  8. #38
    Ive had MK group 24 batteries in my Frontier V6 with great success. After a couple of years I went to replace the MK's and they said the SigmasTek batteries were a much battery, so I ordered a set. After using them for a few days I noticed there was gel leaking out of the corner of the battery leaving acid stains everywhere I went. I sent them back and got another set, after installing them I charged them up but they wouldn't last over a day or so. Come to find out one of the SigmasTek batteries had a dead cell not letting it charge up so I also sent them back. After receiving third set of SigmasTek they lasted less than a 6 months. After that I was done with the SigmasTek batteries and went back to the MK's. After 2 years with the MK's they are still going strong. Ive never had any problems with the MK batteries.

  9. #39
    I'm presently using a pair of MK's that are a good 3 years old and they're still usable. I do a lot of short distance moves all day long which is hard on batteries.

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