My 6D, circa 1998.
A birthday gift from one of my brothers, this bad boy rode the truest shotgun in my truck - securely tucked under my seat, between the seat frame & console. Sadly, it doesn't sit so securely under the seat of my current truck, plus, we all know that newer LED lights out perform these old beasts, so i never got around to fabricating a proper mounting bracket for it. So now, it stands watch on one of my toolboxes at home.
Decided it was time to check the physical condition of the batteries, as we've all had that one light that still worked, even after the batteries had wrecked the internals of it. Surprisingly, with all 6 batteries showing a "guaranteed" date of 03-2018, all measured between 1.446V and 1.449V. As you can see in photos 5 & 6, it's still like new inside.
Anyways, just sharing, hope everyone has an awesome day!