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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🔋 Stay charged, stay unstoppable — power your life with EBL 9V!

SAFETY FIRST - Multi-layer protection guards against overcharge, overcurrent, overheating, and short circuits for peace of mind.
BUILT TO ENDURE - Up to 800 recharge cycles means fewer replacements and less waste—eco-smart and budget-friendly.
POWER THAT LASTS - 600mAh Li-ion cells deliver reliable, long-lasting energy for your essential devices.
CHARGE IN A FLASH - Rapid 1.5-hour charging with dual simultaneous ports keeps you powered up and ready.
UNIVERSAL CONVENIENCE - Compatible with radios, toys, smoke detectors, and more—plus micro USB charging for on-the-go ease.

The EBL 9V Rechargeable Battery pack features 600mAh lithium-ion cells with rapid 1.5-hour charging and a robust lifespan of approximately 800 recharge cycles. Designed with multi-layer safety protections and a convenient micro USB charging cable, these batteries are ideal for radios, toys, and indoor smoke detectors, offering a sustainable and efficient power solution for everyday essentials.

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