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| Product | Revolve XeMini Plus | i.Sound Portable Power (16,000 mAh) | MyCharge Peak 6000 Rechargeable Power Bank | Voltaic Backpack (silver) |
| Price | MSRP: $99.99 | $71.26 to $129.99 | $79.99 | Pricing is currently unavailable. |
| CNET editors' rating | 3.5 stars | 3.5 stars | 4 stars | 4 stars |
| Average user rating | 5 stars | 0.5 stars | 0 stars | 4.5 stars |
| Release date | Info unavailable | August 15, 2011 | Info unavailable | November 15, 2004 |
| Bottom line | The Revolve XeMini Plus is an easy-to-use device that will deliver emergency juice on the go. You can't rely on the sun as your primary charging source, but the green features remain a nice benefit. | Lightweight, quick, and easy to use, the i.Sound Portable Power Max battery is a great way to keep your USB gadgets going when a wall charger isn't accessible. | The MyCharge Peak 6000 is sort of the Swiss Army Knife of portable battery chargers, with built-in connectors for iOS products,
Android devices, and a host of other products. | The Voltaic Backpack's thoughtful design and solar-charging features shine for keeping cell phones, handhelds, MP3 players, and digital cameras charged away from electrical outlets. |
| Battery technology | Lithium ion | Lithium polymer | Lithium polymer | Info unavailable |
| Voltage Provided | 5 V | Info unavailable | 5 V | 5 / 6 / 7.2 V |
| Full specifications | Full specifications | Full specifications | Full specifications | Full specifications |
| Buying choices | MSRP: $99.99 See manufacturer website for availability. |
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| Pricing is currently unavailable. |