Which power bank is the best?

I use the Ambrane power bank. According to the product description on Flipkart, it uses Samsung cells. It also has a LCD display. The % shown is not updated instantly though.
It may be a bit bulky but since I got it for cheap, I like it.
 
I use the Ambrane power bank. According to the product description on Flipkart, it uses Samsung cells. It also has a LCD display. The % shown is not updated instantly though.
It may be a bit bulky but since I got it for cheap, I like it.

+1 to that...using ambrane 10400 one over 1.5yrs now...good one..
Display % is a plus.
Now prices are down even further .
 
Sony & PNY power banks are sleek, light and easy to carry around. look up according to requirements of mAh.
 
Sony & PNY power banks are sleek, light and easy to carry around. look up according to requirements of mAh.
have MI and PNY 10400 mah powerbanks and i can say that PNY is more efficient out of the two.

charges much more times, holds charge longer and takes more time to charge.
 
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