I made a 4s Li-Ion pack out of a drill battery pack! : r/Multicopter
MYLEK MYBMC092 18V Cordless Drill Electric Screwdriver DIY Combi Set, Lithium Ion Battery Pack, 151 Piece Tool Accessory Set and Carry Case with Work Gloves : Amazon.co.uk: DIY & Tools
Wolf 12v Cordless Drill and Impact Driver Kit w/ Battery & Charger | UKHS.tv Tools-To-Go
INGCO Lithium-Ion Cordless Drill and Brushless Impact Driver Kit with 3Pcs Battery Pack and 2Pcs Charger : Amazon.co.uk: DIY & Tools
Cordless screwdrivers,Brushless,18V Cordless Combi Hammer Drill Driver 25+1 with Drill Bit Sets
Skotek Cordless Drill Driver 18V/20V Max Li-Ion 13Pc Electric Screwdriver Accessory Kit LED Work Light Battery & Charger Included | DIY at B&Q
Kobe 12V DC Battery Pack B1203 for ASB12VET Cordless Torque Drill Free UK P&P | eBay
MYLEK MYW09 18V Cordless Drill Electric Screwdriver Set, Powerful Lithium Ion Battery Pack, 18 Volts Combi Driver, DIY Accessory Kit, Black : Amazon.co.uk: DIY & Tools
Hilka 18V Lithium-Ion Cordless Drill Battery | Robert Dyas