Newbie with rechargeable handheld cold laser seeks help for battery replacement

Hello, I'm a newbie here so please forgive my ignorance with this, but my daughter has recently finished medical school and brought me a set of handheld cold lasers she inherited from a retiring doctor who sold her his practice. The lasers very low power and are claimed to be used help alleviate back pain, etc Anyways they need new batteries and I'm unsure of how to proceed. They appear to be two 3.7v Li-ion batteries wired in parallel with some type of management system on them. It appears someone attempted to replace them, but wasn't successful. I wouldn't be bothering you fine folks with it, but I called the manufacturer and they said they would be happy to replace them for $2300! Well, that's why I'm here hoping someone could please help me with it. Thank you so very much in advance for your help!!

The manufacturer will be very happy indeed if he can make about 2280 dollar profit just by replacing two lithium-ion cells…

Can you take a picture of what the device looks like?

Yes. Please take a picture of the device, and if possible, the interior showing what the batteries look like.

Fixing up your light might be as simple as ordering some replacement lithium ion cells for $10 each and then soldering them into position.

You can use this guide to help post up the pics. You can also use imgur to host your pics. Just sign up and upload the pics and it will give you a url to use here in your post.

Not a whole lot we can help with until we see them.

Eagerly awaiting to see how $2300 battery pack looks like :smiley:

Me too.

My money is on NiCd’s

For that much, I will be disappointed with anything less than Tesla model S 250Ah module (which, btw, is half that price on ebay)…