I’ve been using a pocket WiFi since last year and have gone thru so many models from Sapido to, Dlink, ZTE and Huawei. The biggest problem so far is that the 1500mAh drains so fast and degrades in a matter of months if you use it on a daily basis.
So when I found out that there are actually high-capacity batteries for the E5, I ditched all the other pocket WiFis and stick with it. Before this, I would bring several external/portable batteries which is shared with my other smartphones.
The 3600mAh high-capacity battery is more of a permanent solution. That’s more than twice the capacity of the regular battery which is just 1500mAh.
Based on experience, I could get somewhere between 8 hours to 24 hours of usage on a single full charge (really depends on usage pattern).
The benefit of the high-capacity battery was evident during the recent floods where some parts of the metro also experienced some brownouts. So I got two of these charged and ready to go the next time there’s another brown-out.
The 3600mAh high-capacity battery sells for Php2,180 over at TipidPC (see listing here).
Disclosure: Hot Gadgets provided the units for free.