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paleblue USB Rechargeable 9V Batteries (2-Pack) - 4500mWh Lithium Ion, 1000+ Charge Cycles, Includes 2-in-1 USB-A to USB-C Charging Cable, LED Charge Indicator, 3.4 Hour Charge Time

paleblue USB Rechargeable 9V Batteries (2-Pack) - 4500mWh Lithium Ion, 1000+ Charge Cycles, Includes 2-in-1 USB-A to USB-C Charging Cable, LED Charge Indicator, 3.4 Hour Charge Time

Q: Do these work in fire and CO detectors?

If the detectors use 9V batteries, they'll work. They're standard 9V batteries, just instead of NiMH or acid, they are lithium ion usb rechargeable.

Q: Is the 9v battery good for voltage-sensitive devices? ie does it operate at 9v or closer to 8v?

This is a lithium ion battery and the chemical component of these batteries will outlast the alkaline batteries that we normally use. the charge will remain linear for a certain period in relation to what equipment we use. for high discharge rate equipments like motors depending on how we use,or use in continuous manner it will last for around 3 hours depending on my experience and you can recharge again.the voltage drop is sudden so do not overuse it.when you feel or sense something that is unusual recharge immediately.

Q: Do the 9 volt batteries still charge from a 5 volt charger?

No, they will not. The specific charger for a 9volt steps up the 5v usb to aprox 10v to charge the batery. Much like a 12v car battery; charges at 13.8v giving a surface charge of 12.5v

Q: Does the 9V battery have a boost circuit inside to provide a constant 9.0V output, or is the output just two cells in series for 8.40V maximum voltag?

I don't know what hardware is inside the batt as I did not open them. but I test the battery in a Multimeter seen to be giving out the correct amp & voltage, also the multi uses 9v seen to be working good and I use it a lot. Also, the stud finder is a hug, will kill a commercial 9v within hours, the 9v has worked wonderfully. now if they have the same hardware inside as the AAA yes I see then having issue delivering the same continuous current to your device especially if the device pulls a lot. I used the AAA on group of 3 on a headlamp and for the first 5-10 minutes I have a good light bright then dims down to low light, I left it on to fully drain the batteries for over 24hr still on so at least that is a plus.

Product ID: 647116786

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Details

Number of batteries
2 9V batteries
Brand
paleblue
Battery cell composition
Lithium Ion
Recommended uses for product
Toys
Unit count
2.0 Count

⚡3.4-hour fast USB-C recharge

🔄1000+ eco-friendly charge cycles

🔋4500mWh high capacity

Frequently Bought Together

Paleblue USB Rechargeable 9V Batteries (2-Pack) - 4500mWh Lithium Ion, 1000+ Charge Cycles, Includes 2-in-1 USB-A to USB-C Charging Cable, LED Charge Indicator, 3.4 Hour Charge Time

paleblue USB Rechargeable AA Batteries (4-Pack) - 2550mWh Lithium Ion, 1.5V, 1000+ Charge Cycles, Includes 4-in-1 USB-A to USB-C Charging Cable, LED Charge Indicator, Quick 1.9 Hour Charging

paleblue USB Rechargeable AAA Lithium Batteries, 1 Hour Charge Time, Recharge Over 1000 Times, 600 mAh, 4-in-1 USB-A to USB-C Charging Cable, 4 Pack

Description

🔋 Power up smarter, faster, greener — join the #DitchDisposables movement!

FAST FUTURE READY - USB-C charging means a rapid 3.4-hour recharge—get back to work without the wait.
POWER THAT OUTLASTS - 4500mWh lithium-ion cells deliver superior voltage stability and longer runtime than alkalines.
ECO WARRIORS CHOICE - Each battery replaces up to 1000 disposables, slashing landfill waste and your carbon footprint.
ALL IN ONE CONVENIENCE - Includes a 2-in-1 USB-A to USB-C cable that can charge up to 4 batteries simultaneously.
SMART CHARGING INSIGHT - Built-in LED indicators keep you informed on charge status, so you’re never caught powerless.

The paleblue USB Rechargeable 9V Batteries (2-Pack) feature 4500mWh lithium-ion cells with over 1000 recharge cycles, fast 3.4-hour USB-C charging, and an included 2-in-1 USB-A to USB-C cable capable of charging multiple batteries at once. Designed to outperform alkaline batteries in voltage stability and current output, these eco-conscious batteries help reduce disposable battery waste by thousands per pack.

Have a Question? See What Others Asked

Do these work in fire and CO detectors?

Is the 9v battery good for voltage-sensitive devices? ie does it operate at 9v or closer to 8v?

Do the 9 volt batteries still charge from a 5 volt charger?

Does the 9V battery have a boost circuit inside to provide a constant 9.0V output, or is the output just two cells in series for 8.40V maximum voltag?

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