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  • Smart Drive mx1+ questions/issues

    Im having trouble getting the battery to slide all the way onto the standard sling seat pan on my ZRA. It gets to about an inch left and the sling starts to bunch or fold making it hard to get the battery all the way on. Anyone else have this happen, or have a solution?

    Few questions that I didn't see covered in the manual:
    1. When it is on, but you are stationary is it using much battery, or is it only when the motor is running? So if I am not going to be moving for a while should I turn it off?

    2. Does leaving it in my car overnight, around freezing temps in my garage, going to hurt anything? In particular the battery life?

    thanks

  • #2
    I haven't had your problems with the seat sling but I have a carbon fiber solid seat pan and use the accessory sling provided by Max Mobility and it's worked well. I don't know about how much power is being used by the battery when not moving. My guess is that it is almost nothing. I do turn my power off if I am not using the drive though so I don't accidentally cause it to engage. I actually had that happen once. I got home with laundry and transferred from my chair with the SD, left the SD on and when I shoved the chair to move it out of my way, it took off. Kind of funny actually and it was in Indoor mode so it stopped when it hit something but I thought, whoa, what if I left it in Outdoor mode and that happened. I would have been chasing my chair all over the place.

    The freezing temperatures and the Lithium battery, I think that's a question to ask Max Mobility, just to be safe. It doesn't get that cold where I am.

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    • #3
      If your seat upholstery has the cell phone pocket built into it, you need to pull out the stitching and remove the pocket.

      I don't think the cold from sitting garaged overnight will physically damage a lithium battery, though a cold battery won't operate as efficiently as a warm one.

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      • #4
        Different battery types are affected differently by temperatures. Alkaline batteries have the most energy at 100 F. Lead acid are different, lithium are different and there are different kinds of lithium. I think manufacturers are the best source for the properties of a particular battery. Good tip on the cell phone pocket though, that could be the problem. I wonder if anyone uses that pocket. Everyone I know keep a phone in their pants pocket or in a bag on their chair.

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        • #5
          Originally posted by -scott- View Post
          If your seat upholstery has the cell phone pocket built into it, you need to pull out the stitching and remove the pocket.

          I don't think the cold from sitting garaged overnight will physically damage a lithium battery, though a cold battery won't operate as efficiently as a warm one.
          Thanks, I have already taken the stitching out of that pocket, never used it anyway. That's why this has me so stumped. I sent max mobility an email about the battery questions so I'll let yall know what they say.

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          • #6
            Hm, I'm stumped about the upholstery too. Eager to hear what you learn from Max Mobility about the battery. Mine doesn't deal with cold temperatures but who knows where I might go one day.

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            • #7
              Originally posted by Brad09 View Post
              Thanks, I have already taken the stitching out of that pocket, never used it anyway. That's why this has me so stumped. I sent max mobility an email about the battery questions so I'll let yall know what they say.
              Can you grab a photo of the upholstery issue? Is the battery catching on anything in the back?

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              • #8
                I'll try to take a picture tonight, I don't think it's catching in the back. I have to pull the cord through the bar under the seat.

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                • #9
                  Originally posted by Brad09 View Post
                  Im having trouble getting the battery to slide all the way onto the standard sling seat pan on my ZRA. It gets to about an inch left and the sling starts to bunch or fold making it hard to get the battery all the way on. Anyone else have this happen, or have a solution?

                  Few questions that I didn't see covered in the manual:
                  1. When it is on, but you are stationary is it using much battery, or is it only when the motor is running? So if I am not going to be moving for a while should I turn it off?
                  2. Does leaving it in my car overnight, around freezing temps in my garage, going to hurt anything? In particular the battery life?
                  thanks
                  I suspect there is a snag or bump in the battery plastic that should not be there that causes too much congestion when you shove the battery all the way in the seat sling. Try sliding something else in the battery slot and see if it will go all the way in.

                  1. The motor is what draws the big watts, not the standby mode, so don't worry about battery use there. Besides this battery is way overrated for it's intended use. But you do want to be comfortable about not accidentally bumping that switch into outdoor mode. So if that is of any concern, turn it off. If you are good with the switch, leave it on, I do now.

                  2. This probably will get controversial. I read another forum called endless sphere. From those posters and references that I trust, what I believe is they say do not let your battery freeze. One thing to think about is that there is at least one printed circuit board inside that case just for the battery. There could be another pcb for the SmartDrive's controller. Freezing and then warming when used could bring on condensation. You know what water does.

                  That said, I have a trike and a bike in the garage with lithium batteries that have gone through two 20 degree cold snaps this winter. Nuts, but the batteries did not get warmed from use, so hopefully no condensation. The other thing they say is lithium batteries prefer to be stored cold...that's how those two got left out there. My SmartDrive battery usually gets carried in the house.
                  Last edited by nonoise; 01-16-2015, 02:59 AM.
                  I have had periodic paralysis all my life. I lost my ability to walk in 2011 beginning with a spinal block, which was used for a hip fracture caused by periodic paralysis.

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                  • #10
                    Thanks for the responses. Nonoise - I think you're right about the battery. I'm not sure about yalls, but mine has a raised part on the battery under the clip about an inch from the end, towards the front. That is what is catching on the sling:

                    Click image for larger version

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                    Not sure if its supposed to be that way or if there is a way to fix it?
                    Last edited by Brad09; 01-16-2015, 10:48 AM.

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                    • #11
                      It's hard for me to tell what your picture shows, but it does not look correct. I would contact Max-Mobility for direction on what to do next. Here is a photo of my battery. (maybe)
                      Click image for larger version

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                      I have had periodic paralysis all my life. I lost my ability to walk in 2011 beginning with a spinal block, which was used for a hip fracture caused by periodic paralysis.

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                      • #12
                        Yea mine doesn't look as flat under there as yours. I'll get in contact with them and see what they say. Thanks

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                        • #13
                          Nonoise - they sent me a replacement battery, but it still has a little hump under the clip, not as bad as the original though. Would you mind taking a picture up closer, right through the thin space under the clip? Toward the front of the battery, there is a seam in the plastic that runs under the clip, thats what I need a pic of under the clip. Just want to make sure yours is as flat at the first pic you posted. Thanks

                          heres the new one:
                          Click image for larger version

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                          Last edited by Brad09; 01-21-2015, 06:51 PM.

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                          • #14
                            Originally posted by Brad09 View Post
                            Nonoise - they sent me a replacement battery, but it still has a little hump under the clip, not as bad as the original though. Would you mind taking a picture up closer, right through the thin space under the clip? Toward the front of the battery, there is a seam in the plastic that runs under the clip, thats what I need a pic of under the clip. Just want to make sure yours is as flat at the first pic you posted. Thanks
                            I'll be glad to help if I can. They must have had a bad run of cases and or changed the design. I do not understand your picture of where or how the hump occurs. On all (lol) the batteries I've ever seen there is a seam about an inch from the end of the clip. I will pry open my clip and try to get a better picture for you.

                            Edit:
                            I saw your new picture. How the heck did you take that? Anyway, mine is flat. I'll try to show you as soon as my camera battery charges.

                            Second edit:
                            I am having trouble with getting an accurate picture. I do not have a bulge, but with better light I was very surprised to see I have a *dip* very similar to what your picture looks like. I know it's a dip because I looked at it very carefully. You might turn your's and sight it in alignment the way I took my first photo and see if it still looks like a bulge or a dip.
                            Last edited by nonoise; 01-21-2015, 08:10 PM.
                            I have had periodic paralysis all my life. I lost my ability to walk in 2011 beginning with a spinal block, which was used for a hip fracture caused by periodic paralysis.

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                            • #15
                              Thanks, I just stuck my phones camera right against the opening under the clip. When you say a dip, are you meaning it's going into the battery instead of sticking out like mine?

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