Can anyone tell me what the various controls on a Black & Decker SR 910 RT Hammer drill do?

Question edited for clarity.

Could be, but the first thing I would check is the motor brushes.

Parts and wiring schematic.

https://www.partshopdirect.co.uk/black-and-decker-bd163v-type-1-drill-spare-parts-s160/

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I searched the internet, and that also was used for a workbench, in case there is other information to search for a manual.

https://www.ebay.co.uk/itm/202391286088?ViewItem=&item=202391286088


Vintage Black Decker Plus Workmate 2 workbench Dual Height Workmate 750...


http://powertool.manualsonline.com/manuals/mfg/black_decker/black_decker_drill_product_list.html

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Above the trigger there is a black slide switch that will reverse the direction if its in the colckwise direction the richt side is pushed in if counter clockwise the left side is pushed in.

Go to the Black & Decker website at http://www.blackanddecker.com/Manuals.aspx. Put your model number in the search block and it will give you your manual if it's still available.

Change the trigger.Look at eReplacementParts.com and the parts diagrams.

Thumbs back!

Get a new battery.

go to dewaltservicenet.co and they have a locator section that you might find one locally.

if you could, i would check black and decker .com you can find parts and service centers close to you.or maybe at a battery depot