Compatible with Bubba’s Smart Fish Scale and Pro Series Smart Fish Scale, the Bubba Smart Fish Scale Rechargeable Battery is a rechargeable lithium-ion battery cartridge that offers a cost-effective and environmentally friendly alternative to using AA batteries. Including a USB power cord to provide a quick and convenient means of charging, these high-quality rechargeable batteries are designed to put out more power and last much longer than non-rechargeable power options.