Hearing aid batteries

[ladyalex]

I hope someone can help.

I have an elderly relative staying with me over Christmas. She has a hearing aid, but we have stupidly forgotten to bring her spare batteries with us and the current one is running out.
I am pretty sure that I can buy spare batteries from Boots, but can anyone tell me which ones to buy ?
I cannot see any identification on the battery itself and all I can find on the hearing aid is
Siemens Prisma 2 VC+
Does anyone have any ideas, or is it throat lozenges I should get from Boots to ease our throats after all the shouting we will have to do?
Thanks

[york310]

go to a local specsavers (if it has a hearing centre0, my nan gets them there 241. Take your aid and they will know which ones you need

[ladyalex]

Magic!

Thank you I think we do have a Specsavers with a hearing centre nearby.
Happy Xmas!