As much as we've talked about portable chargers, we've yet to come across one that I would call affordable (excluding the various deals we've found, of course). Satechi just changed all that, though; it released a 10k mAh power pack for $50. Fifty dollars! Considering I've reviewed portable chargers with half that capacity for nearly double the cost, I woudl say this one is a good deal right out of the gate.
If you need as much juice as you can get while on the go, then this 10,000mAh portable charger should fit the bill perfectly. This massive battery pack features dual USB ports (one 2A, one 1A) so you can charge two devices at one time, enough juice to charge most smartphone at least four times, and compatibility for "tablet PCs."
While it's going for $90 on Amazon right now, you can score one for $50 from Daily Steals for today only.