Minelab GPX 5000 Replacement Batteries

[Iamrich]

Hello,  I hope everyone had a Great Christmas and Santa was good to you.
I have an old Minelab GPX 5000 from 2014. I tried firing it up and of course the rechargeable batteries are as dead as a doornail.
There are three (I think they are lithium) batteries that are about 2.625" long by .720" diameter.
I don't want to spend the enormous money of getting a new battery pack or having Minelab replace them. I have spent most of my life as an Electronic Technician so this would be a simple replacement for me.
I am almost positive that these batteries are a 1860 Lithium, but I want to make doubly sure.  I would really appreciate it if I can confirm this info. The batteries in the unit are not labeled at all.

Thank You.

[Iamrich]

Thank You, I thought that is what they are, but many of the videos show the GPX's with either four or six batteries. Mine has only three which makes it confusing.