Input: USB 5V. Dummy battery is conductor, no power, with ON OFF switch, which is easy to use.
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AD2P 10400mAh DC UPS EU Mini Uninterruptible Power Supply For Routers Modems Emergency Backup Power 5V/9V/12V/15V/24V
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.
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EDUP SK0023 Starlink Gen3 Router Power Integrated Bracket Starlink Gen 3 Standard Power Supply All in One Mounting
Aliexpress UK
USB input: 5V 2A.
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USB Power Charging Cable For Baofeng UV-5R Pro Walkie Talkie Charger For UV-S9 3800mAh UV5R PRO UV10R Li-ion Battery Fast Charge
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
XIAO ESP32S3 3PCS Pack - 2.4GHz Wi-Fi, BLE 5.0, Dual-core, Battery Charge Supported, Power Efficiency and Rich Interface, Ideal
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.
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MOC APP Programming Power Pack Set Rechargeable Battery Box Octopus Speed Remote Control Program PF Building Blocks Modification
Aliexpress UK
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The new RGVPQ 4-pin Hailong assisted self-propelled lithium battery with 36v20AH30AH super strong power, built-in 30ABMS+charger
Aliexpress UK
Output: 6V. Battery type: AAA. Input USB: 5V.
eBay
2024 Mini Optical Power Meter with Lithium Battery, Visual Fault Locator, Optic Fiber Cable Tester, OPM15mW/30mW VFL
Aliexpress UK
Output: 6V. Battery type: AAA. Input USB: 5V.
eBay
M25 Connector IP68 Lithium Battery Self-locking Waterproof Charing Socket Aviation Plug 50A 2+1+5 Energy Storage Power Adapter
Aliexpress UK