Amorphous silicone solar panel: portability, thermostability insulated, waterproof, overshoot, over-discharge protection solar cell output voltage: 4.5V ... output:500mAovershot, over-discharge protectionadvantages:portability, resistant to corrosion, thermostabilityinsulated, waterproof,moistureproof 3SC1 Wallet Amorphous silicone solar cell charger