1 To 3 AC-DC 3V-12V Adjustable Power Supply Adapter Kit AA+2AAA Battery Replacement For 2-8pcs AA AAA Batteries Aa Battery With Leads: Amazon.co.uk: Electronics & Photo
2 x AAA Battery Box
The cheap shaver i brought didn't include a charging plug and they don't sell replacements, so I replaced the internals with 2 AAA batteries and a DC to DC 3v to 2.4)
AAA Battery (2 Pack) - Active Online
AAA battery - Wikipedia
3v AAA Battery Eliminator USB Power Supply Replace 2x AAA Batteries with Switch | eBay
3V DC AAA Battery Pack [CP-TI-220] - $8.45 : Calpac Lasers Diode Modules Pointers and Levels, 20 years of experience specializing in industrial and promotional laser diode applications
MyVolts 2 Battery ReVolt Kit « Power Supply
AC-DC 3V-12V Power Supply Adapter with USB Replace 2-8pcs AAA Batteries - AliExpress
KieTeiiK Battery Eliminator, AA AAA C D Battery Adjustable 3V 4.5V 6V 9V 12V Power Adapter Replace 2-8pcs 1.5V Battery for LED Toys Remote: Amazon.co.uk: Electronics & Photo