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3D Vision Glasses might have a Battery Charging Issue

September 4th, 2009 · 36 Comments · GeForce 3D Vision

Yesterday I’ve had an interesting issue with 3D Vision glasses. A guy that has ordered the shutter glasses from abroad had received them, but they did not work out of the box and they were completely new. No green light when he pressed the sync button and when he plugged a USB for charging just a blink of the red led and nothing happened. They did not charge and the red light was not staying lit after plugging the charging cable, meaning that the battery was not charging at all…


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So I got called for help and my first guess was that the lithium-ion rechargeable battery had died completely (its voltage reached 0V) and it cannot be jump-started with just the power it gets through the USB. But this was just a guess and I had to open the glasses and test the battery just to confirm my guess. This was my first time opening 3D Vision, but I had general idea on how to open them (I’m good at this and very experienced fixing different electronics). I expected to find the battery on the left side of the glasses’ frame where you plug the mini USB connector for charging, but to my surprise there was only the whole electronics present in the glasses. And in front of the control PCB sits the IR receiver…


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This meant that the battery had to be inside the right frame of the glasses so I had to also open it. And the battery was there – 3,7V with just 50mAh and pretty small in size, I expected bigger and more powerful battery. But still the power consumption has to be so low that the shutter glasses are able to operate up to 40 hours on a single charge. Anyway, Nvidia could’ve fitted a bit bigger battery with larger capacity that could last even longer, because there is additional free space for that. And measuring the battery with a multimeter just confirmed my preliminary guess – 0V, meaning that the battery has been completely discharged. So I had to disconnect the battery and send a few short bursts of energy directly to it with the help of an external 5V, 2A power adapter to give it “a start” so that it can be recharged, and hopefully this helped revive the battery. As a result plugging the mini USB cable in the glasses made them start charging the battery and in a few hours they were ready and functioning without any problems.


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Now, normally you will not have to do this procedure, because you can just get a replacement glasses thanks to their warranty, but in this case they were bought from abroad and sending them back for replacement would mean another two week wait and additional costs for transportation. This is why I had tired to fix them and hopefully the problem was not that serious and it was fixable, although this is something that is not easy to do by just everyone. If you are not careful you can break your 3D Vision glasses, so you need to be extra careful if you try to fix this problem yourself! But the result form this fix I had to do was that it is possible to get your shutter glasses “dead” when you buy them or have them “die” if not being used for a few months for instance. So you should be careful not to leave your 3D Vision not fully charged for longer periods of time, because the battery might discharge completely and bringing it back to life sometimes might not be possible. On the other hand, when you are buying the glasses and they are not a new stock you better try pressing the sync button in the shop to avoid getting ones with possibly “dead” (fully discharged) battery. Maybe in the next revision of the glasses Nvidia can try to find a solution to avoid this problem… ;)

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