Perdix AI AA Battery

[Belzelbub]

It is clear that alkaline batteries shouldn’t be left in the device for a prolonged period (so that’s why, when buying a new computer with an alkaline battery already installed, it is still recommended to change it as we can’t know how long it’s been since it left the factory).

My Perdix came with an alkaline battery installed. I removed it before even turning it on.

But what about Lithium batteries, is that ok to leave them inside the dive computer, even if it’s not used and left in storage?

Yes. Lithium batteries aren't prone to leaking like alkaline batteries are.

 

[Divin'Papaw]

While the energizer lithium batteries are not prone to leaking, I have always removed the batteries for extended storage. I've not had to do that since moving to Florida as I dive at least monthly. However, due to a broken clavicle, I am going to be dry for 2-3 months. I've removed the batteries, purely as a precaution.

 

[tmassey]

Alkaline batteries leak because of the design of the battery. The metal casing is literally consumed as part of the chemical reaction. So when you leave a battery in a device that never turns itself completely off (like a dive computer or digital camera or any other modern device that doesn’t have a true, mechanical on/off switch) the reaction continues, far beyond the point where actual usable power is generated. But that continuing reaction in a slightly-turned-on computer sitting month after month in a dive bag eventually eats a hole in the metal case.

Lithium batteries don’t work that way. Nor do rechargeables. Their metal case is just a case.

I imagine it’s possible for any container to leak under certain conditions. So I’m not trying to tell you you shouldn’t take the batteries out or anything like that. But alkaline batteries leak for a very specific reason that is only relevant to them.