Interesting battery. does it a bms (battery management system)? how does it know to stop charging?

There is a blue light on the battery

Can I use the 6F22 EBL charger for these?

I would assume as long it is 9 volt charger

I'm making a low voltage 1 watt cigar box portable mini guitar amp. Think these will provide sufficient power?

They put out power equivalent to a regular 9v battery, but I've noticed they don't last as long. For example, in my smoke detectors (continuous low draw), their charge would be almost gone in a month vs 6-8 months. However, if you designed the battery compartment appropriately, you could set it up to just plug in to charge instead of removing the battery to charge... which might be cool.

Can these optionally be recharged using an appliance rather than the USB cable?

I have a battery recharging station and I charge them in it.

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🔋 Power up smarter, not harder — stay charged, stay ahead!

BUILT TO ENDURE - Up to 800 recharge cycles—cut waste, save money, and stay eco-conscious with every use.
POWER THAT LASTS - 600mAh Li-ion capacity delivers reliable, long-lasting energy for your essential devices.
SAFETY FIRST ALWAYS - Multi-layer protection guards against overcharge, overheating, and short circuits for peace of mind.
UNIVERSAL CONVENIENCE - Includes micro USB cable to charge two 9V batteries simultaneously from any power bank or car charger.
CHARGE FAST STAY READY - Rapid 1.5-hour charging means less downtime and more productivity in your busy day.

The EBL 9V Rechargeable Batteries pack 600mAh of reliable Li-ion power with rapid 1.5-hour charging and an impressive 800 recharge cycles. Designed with multi-layer safety protections and a versatile micro USB charging cable, these batteries are perfect for radios, toys, and smoke detectors—keeping your essential devices powered sustainably and efficiently.

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