The Gadgeteer has told you about some laptop bags with built-in solar chargers. Those are great, but what if you already have a bag you love? The Fuse 4W Solar Charger from Voltaic can add solar charging capability to any bag. Connect this pouch to your bag, and you’ll add two 2W solar panels and a 3,000mAh USB battery (output: 5.5V, 600mA via USB port) that charges in sunlight or via USB, AC, and DC power. You’ll be able to charge a variety of smartphones, GPS units, hand-held games, and even slowly charge some tablets with the battery’s USB port or with the included adapter tips. The Fuse 4W Solar Charger is available in charcoal, orange, and silver for $129. There’s even a Fuse 10W Solar Laptop Charger with a 16,000mAh battery (output: 5V/2A, 12V/4A, 16V/3.5A, 19V/3A) that can charge your laptop as well as your tablets, smartphones, and hand-held devices for $339.