SUNER POWER 12V Waterproof Solar Battery Trickle Charger & Maintainer – 20 Watts Solar Panel Built-in Intelligent MPPT…

Amazon.com Price: $79.95 (as of 11/05/2021 10:44 PST- Details)

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[Intelligent Charge & Maintain] Built-in intelligent MPPT charge controller, generates at least 10%-20% more power than traditional controller. Smart 3-stages charging algorithm is improved to better charge and maintain 12v battery in all seasons.
[Full Protections] Prevent battery from over charge, over voltage, discharge and short circuit, reversed polarity protection, waterproof and sparkproof, battery is fully protected.