MSUN Bl-2600 Li-Ion Battery For Interactive Cat Toys V4 /V3 /V2 Version Undercover Mouse To Replace 3pcs Size C Dry Cell R14 Batteries 3.7V rechargeable replacement lithium ion Battery 2600mAhSpecially designed for interactive cat toys, used to replace 3 pcs type C size / R14 dry batteries, Compatible Version For Cat toy V4,V3,V2,V1. capacity:2600mAh,Including charging cable. Rechargeable battery. Energy Saving,Environmentally friendly,Economy,cost-effective. Use your phone charger or computer USB ports to charging. Red light when charging, blue light is has full charge. On these cat's meow toy to use the lithium battery, stability of the product and service life can be improved, Besides, No longer need to repeat the purchase of dry batteries, Can save more money.