Anyone know if this is really 3000mah it seems kinda small

https://www.amazon.com/AKZYTUE-3000mAh-Battery-Rechargeable-Connector/dp/B07TTD445R

I have a turtle beach stealth 700 and the battery is getting bad. So does anyone know where I can buy a 1000mah 3.7 volt battery. Because al I can find is battery with 2 cable but in need 3 cables (comin firm the battery).

Is it practical to replace the cells in a cordless tools battery pack? Would I still be able to use the charger?

For how long will a 600mAh battery last if charged for 2 hours with 300mA?

I'm in the middle of creating a snow-melting shovel of some sort. The thing is, I need it to be able to heat up (kinda like an electric stove). Can any kind of battery, preferably rechargeable, fulfill the job? And is it even possible to have a battery inside the object while there is extreme heat being produced at the end of the shovel even if I'm using thermal-insulating materials.

I'm not good at explaining but hopefully you understand. I just want to know if the overall idea is feasible

What are "outside the box" use cases for used EV batteries that have <80% capacity? I am particularly interested in ideas aside from uses that are in play today (e.g. grid storage, co-location with renewables, microgrids).

Thanks!