Replacement battery / power supply for LED light therapy visor

Batteries and Chargers Rechargeable Batteries
1

(Please see picture attached!!)

Hello,

I wanted to ask if you could help me with a power supply problem?

I have a visor light therapy device (for use above the eyes) the battery of which is defective. (Please ignore the arrows in the picture). This is the second time that the battery broke (second device). I have opened the device now, and as a test, I connected two AAA batteries (1.5V) to see whether it would otherwise still work, and indeed the LEDs lit up as usual.

I would like to either connect power directly via an adapter OR use a battery. Because of the Zebralight, I will soon either buy an Eizfan Lux S4 or (most likely) a Vapcell S4 plus, if that is relevant as information.

Since I am not familiar with electronics, it would be great if someone could tell me

- which voltage I should set for an adapter that I would then use for direct power supply

- which battery I should be using if I use a battery — it is important to me that it is protected and as safe as possible.

  • I would also like to carry the battery by cable in a different place than directly on the head / eye as a safety measure, if you could tell me what kind of cable would be suitable for this (1 meter) ….? I would be attach the battery/battery holder as a belt clip.

The device is the FeelBrightLight Visor Deluxe (or something like that). A “cheap Chinese device presumably ”designed by doctors Canada”, which still seems to me to be the best or one of the best considering alternatives. (luminette 3 / Re-timer / Pegasi 2 —— either blue / white instead of green, or light from below instead of above)

(I don’t want to destroy the electronics with too much voltage, or have too little light as a relult of too little voltage.)

Thank you a lot!

[Album] imgur.com

PS. The battery has been discarded of and the wires leading to the battery is where I attached the two AAA non-rechargeable batteries.

(Please see picture attached!!)

Somehow attaching an image does not work, so here is the URL.

2

bumping this because of image issues, my apologies

feelbrightlight-visor-batterie-akku-D hosted at ImgBB — ImgBB (this is the same image as in the original posting, nothing new)

3

Could you remove the PCB and show us, what’s on the other side?

The easiest would be to put in a new LiPo: LiPo Akku 3,7V mit BMS PCB Batterie Handy MP3 Tablet Uhr LiIon Lithium Polymer | eBay (260mAh 601730)

Especially because “Since I am not familiar with electronics” :wink:
My first thought was to convert it to USB-In and use it with a powerbank - that should be relatively easy, just put in a LiIon charger-board ( without a battery) that runs from USB and make it accessible for the cable - or just solder it onto the charger-PCB and have the cable non-detachable

4

Since it has killed 2 batteries, I suspect the charging circuit is overcharging or letting the battery drain too low.
Did the batteries die or is the connection broken?

The 3.6v is what 18650 cells use. If you could find an external holder, you could wire it in place of the current battery.
Just don’t try to charge the thing with the internal electronics.

Do you have a voltmeter that you could use to do some basic tests?

All the Best,
Jeff

5

I read it like this:
It is the second device, the first either was dumped or changed out in warranty - since these visors are not exactly cheap (even thought the inner parts look like they are barely worth 5$) he wan’ts to repair them now because the warranty has run out.

The battery is from 2015, so not exactly new. They have some circuit on them, so overcharging should be averted even if the charger overcharges a bit.

6

Thank you for your help

… I can’t solder stuff….
I also don’t know what you mean with “the other side”, so I guess my photo will be for a good laugh: EB6-F61-B9-1-A4-E-492-C-86-CB-5081835940-F7 hosted at ImgBB — ImgBB

So do you think I could simply use a protected 18650 battery in an external battery holder attached via cable? Or does that come with a highter risk for the device?
I am not happy with the LiIon battery, it has too little capacity for everyday use. I have to use an external battery in any case, or use no battery and instead have a cable dircetly attached for energy provision from an adapter.

The charging electronics of the device are not reliable, I think they are the cause of the battery going bad so fast, twice for me, and for other users too, as I found out.
No connection was broken, it is either (A) extreme bad batteries, or (B) bad charging electronics / drain issue, and I too believe it’s one of “B”.
The typical behavior when it was going downhill with the device was that it would go off after very short periods of time despite having been charged.
The battery is definitely dead.

I could get another. larger LiPo for external use (because like I said it doesn’t last very long even when new), but I won’t have a suitable charger for that.
If I attached an adaptor directly to where the battery was instead of to the charging connector, what voltage would you use to be on the safe side, and what Ampere rating do you think should it have as minimum?

The device is cheeply made, I bought because of lack of alternatives. Dumping the first one was stupid of course, it’s some time ago. The LEDs work fine and the device actually helps.

7

Yes, I think an external 18650 would work just fine. The key is getting it connected correctly.
Does the light work with the external charger connected now?

What is the eternal charger voltage?

8

I meant the other side of the big PCB in the lamp that is held down with two screws :slight_smile:

Does the light work with the charger attached to it and with no battery? That would be the easiest solution if you don’t mind the cable.

9

The external charger has 4.2V 100mA.

I have not connected the adapter directly to where the battery used to be connected (where I cut the wires) because I wanted to be careful. Thus the 2x1,5V = 3V Alkaline AAA choice for testing if the device / LEDs still go on which they then did. So, I attached the AAAs to the cut wires of the removed LiIon battery.

The device cannot be turned on by plugging the charger’s connector into the “socket” where it’s supposed to go for charging. When I did that with the LiIon battery still wired, the device would go on for a split second at best.

I was able to attach the AAAs correctly (red = plus; I just had someone help me holding them connected to each other on a table), so I guess attaching an 18650 would be no extra challenge.

Since I will have a VapCell charger, I was planning on ordering a protected 18650.

I found out it is difficutl to find 18650 holders that hold the protected versions, but in the German forum somebody said this one would hold most protected batteries:

https://www.voelkner.de/products/259516/Keystone-1042-Batteriehalter-1x-18650-Oberflaechenmontage-SMD-L-x-B-x-H-86-x-20.65-x-14.86mm.html

I want to say thank you for all the help and quick responses, what a great forum! I got really careful around Lithium-based batteries and cheap electronics devices after reading up on that, that’s why I am double checking here before setting my house on fire…

10

I’m not sure you even need to worry about using a protected cell if you can’t find a holder long enough.
Though that would be the ideal solution.

Your light draws so little current, that you could just charge the un-protectd battery every so often.
Be sure to go with a quality battery.
You could check the charge with a voltmeter or by putting in your charger.

I looked up the price $$$ No wonder you want to save these lights!
All the Best,
Jeff

11

I hope you enjoy your stay, eulenfalter_!

There's a link in my signature on how to post pics on BLF.