Can i leave the usb cable plugged in whilst using the battery? not charging and discharged at the same time, just need to have the ability keep usb in

While the battery charges charges using the USB there would be no problem, leaving the USB charger cord plugged in as there would be load on the charger or battery. You cannot overload the USB Charger when its not not under charge. They are designed that way when they are made.

Is ebl usb rechargeable 9v batteries - 5400mwh suitable for guitars?

I bought these for another purpose. Short version, I was using a 9v guitar battery box in another project. These batteries did not fit in the battery box

Is the size of ebl usb rechargeable 9v batteries standart or larger than usual ones?

The same size as the normal 9v battery.

Is it safe/possible to charge and discharge these at the same time? Can I leave them plugged into the device they're powering while I charge them up?

In the case of the USB chargeable batteries, yes it is. They continue to produce 9 volts on the main terminals and can deliver power to connected devices while being charged via the micro USB socket on the bottom. While charging the red LED lights up as normal.

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EBL USB Rechargeable 9V Batteries - 5400mWh Long Lasting Batteries with Micro Charging Cable - Quick Charge in 2 Hours (Pack of 4)

EBL USB Rechargeable 9V Batteries - 5400mWh Long Lasting Batteries with Micro Charging Cable - Quick Charge in 2 Hours (Pack of 4)

Product ID: 217390224

Details

Battery capacity
5400 Milliamp
Battery cell composition
Lithium Ion
Brand
EBL
Number of batteries
4 9V batteries
Recommended uses for product
GPS

⚡2-hour quick charge

🔋5400mWh high capacity

🔌USB rechargeable convenience

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8025 som

Duties & taxes included

In stock

Sold byAmazon KyrgyzstanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔋 Stay powered, stay ahead—never run out when it matters most!

RAPID RECHARGE - Advanced iQuick tech fully charges batteries in just 2 hours—cut downtime, boost productivity.
BUILT TO ENDURE - Up to 500 deep charge cycles with zero memory effect means these batteries keep performing like new.
POWER THAT LASTS - 5400mWh capacity delivers steady, long-lasting voltage for your essential devices.
VERSATILE RELIABLE - Perfect for smoke alarms, wireless mics, GPS, toys, and medical devices—power your life’s essentials.
UNIVERSAL USB CHARGING - Charge anywhere with the included 4-in-1 micro USB cable—no bulky charger needed.

EBL USB Rechargeable 9V Batteries pack a powerful 5400mWh capacity with lithium-ion tech, offering up to 500 recharge cycles and a rapid 2-hour USB charging time. Designed for high-demand devices, these batteries combine convenience and longevity with a built-in LED charging indicator and a versatile 4-in-1 micro USB cable, making them the smart choice for professionals who value efficiency and reliability.

Specifications

ASIN	B089CRTDDY
Amperage	2 Amps
Antenna Location	GPS
Battery Capacity	5400 Milliamp Hours
Battery Cell Type	Lithium Ion
Battery Weight	120.8 Grams
Best Sellers Rank	1,453 in Electronics & Photo ( See Top 100 in Electronics & Photo ) 50 in Rechargeable Household Batteries
Brand Name	EBL
Country of Origin	China
Customer Reviews	4.4 4.4 out of 5 stars (911)
Item Dimensions	45 x 26 x 17 millimetres
Item Weight	0.15 Kilograms
Manufacturer	EBL
Model Number	9VCV-USB
Number of Batteries	4 9V batteries required.
Reusability	Rechargeable
Unit Count	4.0 count
Voltage	9 Volts

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