Gives a 12 volt output.
eBay
12V 7Ah Battery Case Holder Empty Box For 18650 Battery Holder Nickel Strips Battery Pack Storage Box Power Tool
Aliexpress UK
Battery Holder Type: 12V 23A battery holder for 1 CELL (Battery not Included); 12V 23A battery holder with bare leads. Red and Black Color leads for Easy Identification of Polarity. Easy to Use: Deigned with spring clip, tinned wire end, easy to install and remove a battery, convenient for electric circuit DIY work.
eBay
24PC PKCELL 1.2V AAA Battery 1000MAH 3A aaa Ni-MH batteries AAA Rechargeable Battery toys with 6PC Battery Box holder
Aliexpress UK
1-8 x AA Battery Holder Box Case Connector Open or Enclosed With Switch 4.5V/12V. Wholesale 0.5ml-240ml Glass Bottles Tiny Empty Glass Bottle With Cork Vials Jars. 10ml-100ml Square Amber Glass Dropper Bottle w/ Pipette Essential Oil Container.
eBay
ABS Battery Case 12V 7Ah Battery Case Holder Fit 18 650 Cells 3x7 Nickel Strip Storage Box For 18 650 Battery DIY Battery Pack
Aliexpress UK
[Suitable battery]: AA dry cell. if you need more. [Color]: Black. ● Good quality. [Answer]: Because there are 4 more cells on the back.
eBay
DIY Battery Holder 1/2/3/4/8 Slots D Size Battery Holder Cell with Wires Durable Battery Holder Case Rechargeable Battery Case
Aliexpress UK
150ml leads with stripped ends. AA Battery Holder. Holds 8 x 1.5V AA Batteries. United Kingdom.
eBay
Turmera 12V Battery Box 3x7 18650 Holder 3S 40A BMS with Voltage & Capacity Display for 12V Lead-Acid Batteries UPS Replace Use
Aliexpress UK
9V Connector. AA Battery Holder. Holds 8 x 1.5V AA Batteries. United Kingdom.
eBay
Turmera 12V Battery Empty Box 2A Charger 3X7 18650 Battery Holder 3S 40A Balance BMS Weld Nickel for Replace 12V Lead-Acid Use
Aliexpress UK
(1) 8-AA Battery Spring Clip Holder Case Plastic Storage Box With Two Wire Leads. For Battery Type: 8x AA Battery. Holder Size: 5.7 x 2.8 x 6.2cm (L x W x H). You are buying, using and possessing this item at your own risk.
eBay
12V Battery Storage Box 7A to 20Ah 3X7 18650 Li-ion and 1X4 32700 Lifepo4 Battery Holder for Replace Lead Acid Batteries Use
Aliexpress UK
Quantity of Storage: 1-8pcs AA Batteries. 1 x Battery Holder Case. Material of Coil Spring: Nickel Plated Steel. Made of high-quality ABS, resistant to impact, solid and durable. Material of Case: ABS.
eBay
20pcs PKCELL AAA Battery 850mAh 1.2V NI-MH AAA Low self discharge 3A Rechargeable batteries and 5pcs battery box holder AA/AAA
Aliexpress UK