Is there a downloadable manual for the Norelco 5822XL?

You will find batteries for model 5822XL at shaveroutlet.com. See link below. Scroll down the page for helpful installation videos

http://shaveroutlet.com/shaver-replacement-parts/shaver-battery-pack-for-most-norelco-more-p-278.html

Go to:

http://download.p4c.philips.com/files/8/8160xlcc_40/8160xlcc_40_dfu_aen.pdf

This is the only manual I have been able to find. Hope this helps.

The battery is replaceable but you need to know how to solder. You will find the correct battery at shaveroutlet.com. See link below

http://shaveroutlet.com/shaver-replacement-parts/shaver-replacement-battery-pack-fits-norelco-3605-others-p-277.html

You will find the user manual at the link below

http://download.p4c.philips.com/files/3/3601x/3601x_dfu_aen.pdf

Philips cliams that the Norelco shavers shouldn't be opened. If you have any problem with your shaver you should visit your nearest Norelco service center. You can contact Philips support to get details for your nearest service center.

FYI, I've provided a link to download the manual for 6853XL . Hope this helps.
http://www.retrevo.com/search/v2/jsp/mytrevo/myTrevo.jsp?page=man

You look at Manual Norelco Arcitec Electric Shaver.

http://download.p4c.philips.com/files/1/1050x_22/1050x_22_dfu_aen.pdf

And you need to Norelco Arcitec Electric Shaver replacement heads is Norelco RQ10 shaving heads.

It means that it is time to change the heads. You will find the user manual for Arcitec models at the link below

http://download.p4c.philips.com/files/1/1050x_22/1050x_22_dfu_aen.pdf#search=1090x

You will find replacement heads for this model at shaveroutlet.com. See link below

http://shaveroutlet.com/shaver-replacement-parts/norelco-philips-rq10-arcitec-replacement-heads-p-353.html

please see link below for this manual

http://download.p4c.philips.com/files/7/7800xlcc_40/7800xlcc_40_dfu_eng.pdf