Which battery is best in 2021 (battery 21700) coils+battery for MTL

[Przemix]

Sup everyone, Im looking for wisdom, I did some research on line and please correct me if im wrong.

here is my device Aegis Max Geek Vape and smok Mag Grip

well the most important part are the coils right? Yeah...and the battery....
well...

COILS:

Coils 0.8 ohm 15-18W (4.2amp at 15W and 4.7 amp at 18W MAX that im using at Aegis device)

Coil 1.2 ohm 10-14W (2.7 Amp at 9W and 3.49Amp at 14W MAX that im using at Aegis device)

now......

Battery:

Battery I bought as a newbie, well I still am a newbie... I just chose one without even doing research, I just took one with good reviews without even looking or knowing i need low amp battery but i think i got lucky and chose the right one.

i bought :

Samsung 50E 21700 5000mAh 9.8A flashlight 3.7V rechargeable w/ case tesla

So is it safe battery on low amp coils and wattage?

it does have low amps 9.8A and last me 2 days unlike 18650 for only a day ,

so was it good buy?

does the amp has to be around middle like 4-5 amps so it works perfect with coils? (since battery has almost 10 amps)

how you look at that to be safe and not damage battery or get in trouble. Please educate me and share your wisdom.

thanks