OYMSAE 20W 12V Solar Panel Car Battery Charger Portable Waterproof Power Trickle Battery Charger & Maintainer for Car Boat 汽车用品 RV with Cigarette Lighter Plug & Alligator Clip

22 % High Conversion Rate:Monocrystalline solar battery charger use ETFE , with a light transmittance of up to 95 %. The 20 W trickle charging mode is an ideal choice for low-cost maintenance of your 12 V battery powerIntelligent Protection:Combined with built-in charging microprocessor technology, it will not overcharge the battery when fully charged during the day, and prevent the battery from reverse discharge at nightCharging Visualization:The indicator lights are used to help you understand the charging status: the blue light is on (in the sun), the red light is on (charging), the green light is on (charging completed), three indicator lights are off (a short circuit occurs). You can check the connection in time when the solar energy failsPlug and Play:The three -pieces SAE cable included with the solar panel kit allows you to have more choices in charging methods. Plug and play, even for inexperienced novices, fast connection can be achievedSturdy and Durable:Waterproof solar trickle charger, adding CPB as the bottom plate, reducing the risk of reducing the efficiency of the solar panel due to panel breakage