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I-Glide battery charge, or Next, even Tailwind

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    Worked on this most of the weekend and got everything working. Took me forever but I got the lights working. I have not used it much so I don't know how well the lights will correspond to the actual state of charge. The lights work by counting amps in and amps out to keep track of how much capacity is left. The CRM Tailwind battery, which is what I used, is listed as 8.4ah. I built a 9ah pack so the capacity is very close and the lights should match closely to before the upgrade. For the last 6 months I have used a 17.5ah battery and I suspect the lights would show a dead battery with 50% capacity still remaining.

    The battery turned out really nice. The Clinton River battery stickers come off easy with a heat gun and can be reused.

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      Perfect box and stickers, that is one sweet battery Maddog. In order to get it to show four lights are you charging it with the lithium charger?

      I ask because the lithium charger cuts out at 29.2 while the nimh charger cuts out at something lower, 28.8 I think. So the nimh charger will not fully charge the lithium battery, which might be what you are talking about comparing amps in and amps out.
      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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        I am charging with the lithium charger. I could not get the lights to go up with the charge because you need to charge through the iglide circuit board. When you disconnect the old nimh batteries from the circuit board the lights reset to completely dead even if you install a fully charged battery. I installed my lithium pack with about 35% charge, the battery box showed a red flashing light when the handle was pulled. I then charged the battery to 100%, putting about 6ah into it. The case now only shows 3 lights because it needs 8.4ah in to think it is fully charged. When the battery gets fully drained and then fully charged the lights should then be in sync.

        I like having a charge port on the back of the battery so I can charge the battery without removing it from the chair. The charge port needs to be connected between the main battery plug and the circuit board located at points 1 and 2 in the picture below. I was connecting it to the main battery wires 3 and 4, this kept the battery lights from going up when charging.
        A much simpler solution is to cut the plug off of the iglide charger and add a connector that matches your lithium charger. This keeps you from having to add any charge port. I had 2 iglide chargers so I did not worry about destroying one.
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          What's next? You seem to have solved all the issues upgrading to lithium. It's too bad CR failed at doing so.

          My quick and easy direct connection bypassing the printed circuit board works just fine for me as a fully charged 10ah battery lasts plenty long enough. When it does fail my wife grabs the little backup one and I get going again. Those too were thanks to your pioneering. Thanks for posting.
          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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          • cadamson
            cadamson commented
            Editing a comment
            How long have you had your Tailwind/iGlide?

          Bypassing the pcb is probably the best solution if you don't have the latest tailwind with the battery gauge on the chair. 10ah is enough to get through just about any day, I wish the chair had come with a larger battery from the factory. Battery life was always this chair shortcomings. I remember having range anxiety wondering if the battery was going to die and leave me stranded at the end of the day. It really frees things up when you no longer have to worry about that anymore.
          These chairs are so reliable I bet there are many chairs out there that still work fine if not for dead batteries that can't be bought anymore. Since 2003 I have worn out 2 iglides and have been using my current iglide for 5 years. I have a new tailwind sitting in the closet that I will use when this iglide dies. I am set for years to come. The battery cases tend to lose connection over time as the pins wear out from constantly removing the battery to charge. This is why I added a charge port to the back of the battery, it rarely gets removed from my chair.

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            So, some wheelchair friends who had had batteries rebuilt locally sent me to a place called positive battery in Connecticut. They were super nice guys and seemed to laugh at me when I said would you be able to redo this battery? They put in 40 NIMH 1.2 V 4200MAH, "high drain battery". I am charging it now but before I put it in my wheelchair and blow up the CPU, does this sound right? By the way, they opened up the casing by just applying and heat gun. Maddog, I did not want to burden you asking you to rebuild but my two last batteries were cutting off (at least only at the tops of hills) and I decided to try and give it a shot at a local place

            What do you guys think?

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              If it charged fine it is probably ok but yes those are the correct cells. If you have a multimeter you can check pins 1 and 3 to verify the voltage but I feel sure they checked that. I don't know much about the bms in those batteries but it should cut power if something is bad wrong.

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                Fingers crossed! I Will let you know. Its been unnerving the last 4 months not knowing if the power was going to fail halfway up the ramp into my car. Thank you! When you say pins 1 and 3, is this because 1 is ground and let's say I put the ground wire on it and positive connecter on pin 3 and hope for what target voltage?

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                  Originally posted by maddog View Post
                  If it charged fine it is probably ok but yes those are the correct cells. If you have a multimeter you can check pins 1 and 3 to verify the voltage but I feel sure they checked that. I don't know much about the bms in those batteries but it should cut power if something is bad wrong.
                  I did ask him to go through the carecure postings when he was having trouble getting the correct batteries and assumed he did, but yesterday when I picked up the battery, he said he did not

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                    Hi all,
                    I realize this may not be a battery issue, but it is an iGlide issue. I apologize if you've already seen my previous post, but this thread makes much more sense. Thank you cadamson for the suggestion!

                    ​​​​​​ I've owned mine for 17 years and this evening it decide it no longer wanted to work. Both my batteries have a full charge and the light comes on once I click the on/off button, however, nothing happens when I try to engage the pushrims/wheels. A few times over the past couple of months I noticed that the left pushrim would be a little hesitant in engaging, but would after a couple of seconds and "rocking" the pushrim back and forth. Tonight, the same thing happened, but this time neither pushrim would engage.

                    Has anyone had this problem in the past and if so, is there any way of fixing it? My concern is it's an electronic issue or a part that has given out and can't be replaced.

                    Any news about Clinton River Medical selling the design or something similar out on the market besides the add on power source?

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                      Here's one more question for the group.


                      Has anyone looked into when the iGlide/Tailwind technology patent will/have expired? I've seen articles showing the iGlide in 2003, but I thought I had read something many years ago that they were working on it in the mid to late 90's. I would think the patent is either expired or getting close to expire. I read an article that Independence Technology bought the technology from DeltaGlide in which I found an expired patent.

                      If the actual patent for the iGlide/Tailwind technology has expired, would anyone like to venture down the road of trying to give this awesome chair a new birth? I don't have the type of knowledge that a lot of you guys have and reading some of your posts I know without a doubt that you guys could recreate this chair in your sleep.
                      I for one, would buy one & would help wherever I could!!

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                      • cadamson
                        cadamson commented
                        Editing a comment
                        I know Tailwind bought it from J&J and CR bought it from Tailwind

                        I believe Craig left CR before they were sued but it might be worth sending an email to him from a bunch of "US" begging for info on the patent. From there we would have to find someone willing to manufacture it and that is a ton of money, especially given that the story losing 9 million to one guy who broke his tibia and fibula. Wish that guy would turn around and put that 9 million into a company but somehow I don't think that's going to happen. His gain is our loss

                        Clinton River Medical Products, Founding General Manager, medical devices
                        Craig Doescher: contact@doeschergroup.com

                      Originally posted by cadamson View Post
                      I know Tailwind bought it from J&J and CR bought it from Tailwind

                      I believe Craig left CR before they were sued but it might be worth sending an email to him from a bunch of "US" begging for info on the patent. From there we would have to find someone willing to manufacture it and that is a ton of money, especially given that the story losing 9 million to one guy who broke his tibia and fibula. Wish that guy would turn around and put that 9 million into a company but somehow I don't think that's going to happen. His gain is our loss

                      Clinton River Medical Products, Founding General Manager, medical devices
                      Craig Doescher: contact@doeschergroup.com
                      Yes, you are correct. Independence Technology was a J&J company who sold to Next (?) Tailwind and the last company who owned it was CRM. I spoke with Craig a few times, but the last time was right before they closed up. I tried to call his cell number I had for him, but it has been disconnected.
                      It would be great if we could hit him with a group email.

                      And yes, I can't believe one guy got that kind of money which ended up screwing the rest of us who really need a chair like that!! It would be great if he would put that money to good use, but we all know that will never happen☹️😤
                      Last edited by yojama95; Today, 12:28 AM.

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                        How about a write him and I will cc you on it?

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