Biling Solar Bird Bath Fountain Pump, 2.5W Solar Fountain Pump with 800 mAh Battery Backup, Free Standing Solar Powered Water Fountain Pump for Bird Bath Garden Pond Pool OutdoorConstant Flow Solar Fountain with Battery Backup Our 2. 5W solar panel & 800 mAh battery is more powerful than other solar fountain, and our fountain can store electricity in the battery. When the sun shines, the excess electricity will be stored in the battery, ensuring the fountain constant flow, it will continue to work without spurt intermittently! (Even the sun is weak) Solar Panel Circuit Upgrade Even if the solar panel is blocked by 3 4 pieces,