So my swiss mobile parked up after 5yrs of faithful service and I decided to get a new one, same product buy with a higher capacity. Went to one of the slot outlets at computer village but was told swiss mobile was our of stock. The sales rep now introduced me to thier new range of power banks. Was a bit skeptical but she did a very good job of convincing me it's the best in the market, it comes with a warranty of one week, so far, there hasn't been any customer returning the device and all that. So I settled for the slot 15kMah range. Paid 7500 and left. I bought an amazon charger of 2.5 amp to charge it with. I charged it to full capacity with Nepa light before I started using it the following day. Now this power bank does not give my Sony Ericsson battery of 2k+ up to two charges before it's completely drained. Am so disappointed. It's a big WACK for me. Any idea on a good power bank tested and proven to work comment below pls. Mods pls move to front page. Some one might be about to make same mistake as me. 7500 no be small money for this recession na!