I’ve just done a quick search and you can get a new battery for those for about £12.
And there’s a 6 minute tutorial on yt showing how to replace the batteries. I’ve had a quick watch of it and it looks very easy, it’s only the battery that is very lightly glued in. The rest is just screws and clips. It looks like you just need a small screwdriver and a thin plastic prying thing.
I’ve just done a quick search and you can get a new battery for those for about £12.
And there’s a 6 minute tutorial on yt showing how to replace the batteries. I’ve had a quick watch of it and it looks very easy, it’s only the battery that is very lightly glued in. The rest is just screws and clips. It looks like you just need a small screwdriver and a thin plastic prying thing.