USB input: 5V 2A.
eBay
CR2032 3V Lithium Battery Coin Cell for AirTag,Key FOB,Calculator,Watch - Long Lasting Power - DL2032/BR2032/LM2032
Aliexpress UK
This eliminates the need for 1 to 4pcs D LR20 batteries. 1x USB to D Battery Eliminator Cord. 3V with one D dummy fake battery,4.5V with two D dummy fake battery,6V with three D dummy fake battery(as conductor,no power ).
eBay
Daily-max CR2032 3V Lithium Battery Coin Cell for AirTag,Key FOB,Calculator,Watch - Long Lasting Power - DL2032/BR2032/LM2032
Aliexpress UK
This eliminates the need for 1 to 4pcs C LR14 batteries. 1x USB to C Battery Eliminator Cord. input: for 5V 2A. output: for 1.5V/1.5A,3V/1.5A,4.5V/1.2A,6V/1A Max(optional). Battery siez: 49x25mm.
eBay
Optical Power Meter G10 High Precision Rechargeable Battery FTTH Fiber Optic Power Meter With Flash Light OPM FC/SC/ST
Aliexpress UK
Input USB: 5V. 2x Dummy Battery Adapters (Without battery). Output: 3V/4.5V/6V (optional). Made of high quality plastic material, with short-circuit protection, over-charging protection and over-current protection.
eBay
FTGT New Optical Power Meter G10 High Precision Rechargeable Battery FTTH Fiber Optic Power Meter With Flash Light OPM FC/SC/ST
Aliexpress UK
This eliminates the need for 3 pcs 4.5V AA batteries.
eBay
T11 Portable Power Station, 1200W LiFePO4 Battery,Fast Charging, Suitable for Outdoor Trips, Parties and Indoor Emergency Power
Aliexpress UK
The USB cable is used for replacing 2pieces AA batteries, so it can be used for most devices that require 2 AA batteries, such as LED lights, decorations, battery operated table lamp. 1x AA Dummy Battery.
eBay
New Optical Power Meter G10 High Precision Rechargeable Battery FTTH Fiber Optic Power Meter With Flash Light OPM FC/SC/ST
Aliexpress UK
For LED Lights & Decorations - 2m Black. Crafted from pure copper wire, ensuring superior conductivity for optimal performance. Transform your battery-operated devices into a hassle-free experience with our AA Battery Eliminator.
eBay
G10 High Precision Optical Power Meter FTTH Fiber Optic Power Meter with Flash Light OPM FC/SC/ST Rechargeable Battery
Aliexpress UK
1 Set AA Battery Eliminator. Types: 1 to 3/ 1 to 1/ 1 to 5/ 1 to 10 Batteries.
eBay
Mobile Outdoor Power Supply 220v, Large Capacity, Portable Home Self Driving, Live Streaming, Camping, Emergency Power Storage
Aliexpress UK