RF models have LED battery indicator. Constant On. Tinned, sealed wiring and electrical connections. Sacrificial anode included on column. Max high bypass on all except GWB43/GWB36. Triple corrosion-resistant paint. Redesigned lower unit w/built-in weed ring, extended skeg. Corrosion-proof column. All cast-metal components built w/low copper, low corrosion alloy. Non-washout, silicone-coated terminals.