Hi nvas7407!
Thanks for getting back to us!
As mentioned, we highly do not recommend our customers to open devices and change components on their Surface devices. It would be best to contact live Microsoft support team for further assistance on this.
Thanks again for choosing Microsoft. Hope this helps!
Regards,
RodelioP.
I have this exact problem! 1st gen Surface book- no warranty- too far out of date- I need to change the batteries myself. Please don't say you don't recommend this again. We just need to know what battery is the right one to use.
Thanks!