Powerful reserve tank (6600 mAh), even and especially for iPad

MiPow SP6600b PowerTube universal energy tank with 10 different USB adapter for tablet computers (iPad, Galaxy Tab, Kindle, ...) (6600mAh) BlackSince on longer trips always the problem of having to deal, you have, so you has his iPad or smartphone at least here.
Sooner or later, however, comes the battery to its limits and precisely for this I bought 2 spare batteries of MiPow, the 5500 and the 6600.
Both are very good, the anticipated. Advantage in 5500: smaller, benefit 6600: significantly more power.

For a smartphone like the iPhone, this means good 2x charge, for the power technically significantly more sophisticated iPad (can not be eg load through the USB port of a computer) I was initially skeptical.

Here too, however both work very well with the 5500 to get to 50-60% battery power, with the larger (and visually) 6600 more than 70% battery capacity.
This has been a pleasant surprise for me as I've tried other mobile spare batteries and none have found to comply.

For me, a strong buy recommendation, but it should not not shy away from the moderate costs and prefer to set a battery with higher capacity one. From Minimalzuladungen by 20-30% has not really much.