The Bubba Blade Smart Fish Scale Rechargeable Battery powers the Pro Series Smart Fish Scale. The Bubba rechargeable lithium-ion battery lasts longer than a non-rechargeable one, so in addition to being better for the environment, you won't have to constantly buy a replacement battery. Plus, it's a good idea to have a backup Bubba Rechargeable Li-ion Polymer Battery powered up and ready to go anytime. Model number: 1185976 Compatible with Smart Fish Scale and Pro Series Smart Fish Scale Output 3.7V 2500mAh 9.25Wgh USB charging cord included Quantity per pack: 1