hmm ya comparing spg SP and the china battery, of cuz SPG sp better.
but regarding take out casing change the batt and use power bank, i think most ppl will rather use a spare original battery.
Power bank need to bring the powerbank and the cable to charge on the spot, time wasting.. just swap out the battery and u got 100 percent full batt liao. no need waste time charging or bringing the power bank out. lol
Yes, i will rather use spare battery then use power bank to charge the spare battery in the bag. Now i use power bank on the go is very troublesome.

