Natural is the default. The vivid one gives boosted colours

What's you usage pattern?

Xiaomi Power Bank 4i 20000mAh 33W Super Fast Charging PD |Smart 12 Layer Protection|Type C Input & Output|Triple Output Ports|Supports Android,Apple, Tablets, Earbuds,Watch(MI Powerbank),Blue https://amzn.in/d/08SulPnwCurrently 2199

Yeah, I also prefer this one, best in the segmentYou will get great longevity with Mi powerbankI checked its out of stock in flipkart. You can get it in few days

It's normal, after few seconds it turns on the Dynamic lock automatically