I got 4 of these in in a bulk lot of Lego, but the lamp is getting quite dim in a couple of them.
Is it possible to change the battery in a 54604 light brick?
It looks like the brick should open, but I don't want to force one apart and break it.
There's a YouTube video which explains how you can replace the battery in that light brick.
Quoting from that site:
What you'll need:
- ExoForce Light brick (obviously)
- A small screwdriver (or other item with a long, thin shaft) (my s'driver was 2mm (0.07 inches) thick)
A small 3V battery.
- Put the point of the screwdriver into the hole in the brick (where you'd normally put the fiber optics cord).
- Using quite some force, lever the screwdriver until the 'lid' pops up at the front.
- Insert the screwdriver into one of the small gaps at the side where the 'lid' pops up, and lever the lid up again.
- the lid should come right off. From here, you can shake the brick and the battery should fall out. Simply slide the new battery in and click the lid back on.
Taken from the additional notes of this bricks Bricklink catalogue entry.
This item takes one CR927 3V Lithium battery.
A very tiny flat screwdriver is needed to push the little clips to open up the assembly.
I occasionally use the minifig-scale Axe, Crowbar or Screwdriver to pry plates, tiles and other bricks. If you don't have a screwdriver of your own it might be possible to use one of these utensils to unscrew the casing depending on how tightley screwed in place your brick is.
This doesn't apply to bulk LEGO purchases, but in some cases LEGO sets will include instructions on how to replace the battery.