Flume 2 Battery

Maybe you're like me… you went to replace your Flume 2's battery, only to find out it's a property battery!! 

WHAAAAAAAAAAT?!?!?!

A little internet searching shows that the original battery uses 4 x AA Lithium batteries (yeah, I didn't use those :), so I reused one of my other battery pack models to create this battery pack.

I used 22 AWG solid wire to connect all the batteries. Simply remove all the insulation from your wire and loop it around the holes as seen in the photos. I used some plyers to get tension for tight wires as I was pulling them. A majority of your wire will be exposed on the outside of the case, the inside of the case should only have enough wire to expose and create the battery terminals. 

If you're worried about the exposed wire on the back side of battery pack that doesn't touch the battery terminals, you can cover it with tape. 

In case you need help understanding the wiring, here is a photo from Reddit showing the inside of the original battery. 

::  1 YEAR UPDATE - 6/2026  ::

I've had the same pair of AA batteries in for over a year and they're still going! I do often get “battery low” notifications, but I believe this is due to the fact that Alkaline AA batteries run at 1.5v x 2 = 3.0v, and Lithium-ion batteries run around 3.7v on average. So, the low battery notification is expected. I will however swap them out soon!