The 12V100AH battery has a power of 1,200,000 mWH. Since the power bank uses 5V power, 10000mAh means 50000mWH power. If the conversion efficiency loss is not taken into account, it is equivalent to 1200000÷50000=24.
Multiplex ternary lithium battery 12V 100A
Your question is not very clear because I do not know the voltage of your xenon lamp. But in terms of power calculation: a 12V100Ah battery is equivalent to 1200Wh. When used on a 100W lamp, it can theoretically be used for 12 hours (without loss of power).
I hope this helps you.
The 12V 100AH battery can be divided into two types of ternary lithium batteries according to the difference of individual cells:
A battery composed of 18650 cells weigh approximately 7.5 kg.
Battery composed of polymer batteries, approximately 4KG. (The gram/capacity ratioity produced by each manufacturer is different, for reference only)