I had brought syska power pro 200 powerbank in amazon.in the product has awesome cool with charging capacity with 20000mah power capacity with bis certified battery . it takes 7-10 hours to get full charge and we can charge our andriod mobile upto 4 times and its pocket free device, which can be taken within your pocket everywhere you go .
advantages;
it has twousb ports, so we can charge multiple device at a time.
it has precise ic protection which can be safe for over charging.
it has certfied as bureau of indian standards(BIS) polymer battery
it has automatic hilbiration mode, so you can save your more battery power, you can charge it again it will start.
available in 2colurs, white and black
disadvantages;
warranty of this powerbank is 6 months
the weight of battery is 406 gms
the battery has more weight to handle
due to its heavy weight we cannot handle it safe in our hands- the battery has more weight to handles
I tell u guys go for it and till now I am using this syska pro powerbank no fault came till now