Replacing batteries on Panasonic Dentacare EW1211

Oddly specific? Yes.
Replacing batteries on Panasonic Dentacare EW1211.

This is where I ordered the spare 1.800.8 Panasonic 1.2v Ni-MH 1100mAh batteries from:
https://www.espares.co.uk/product/es1608797/dental-oral-irrigator-rechargeable-battery

I ordered the iFixit 64 bit driver set from Amazon:
https://amzn.to/2Mvgu41
And I got the MINI ES121 electric screwdriver from Bangood:
https://eu.banggood.com/custlink/GGGKIb9VLt
(The above two affiliate links)

It turns out Panasonic do have instructions for changing the battery on their website but the PDF is in spanish:
ftp://ftp.panasonic.com/oralcare/om/ew-1211_en_om.pdf

Видео Replacing batteries on Panasonic Dentacare EW1211 канала Alex Gee