You should be aware of this before importing cheap "rechargeable" toys and battery-powered household appliances, with regard to the supplied lithium- ion battery.
Accu Lithium 3,7V 2300mah format 18650 - Accus-Service - Achat Accu Lithium 3,7V 2300mah format 18650
Wholesale Li-ion Icr18650 Lithium Li Ion 18650 Battery 1300mAh 3.7V Rechargeable Batterie - China Rechargeable Batteries Recycling, Batteries 18650 Rechargeable | Made-in-China.com
Chargeur Kt-cph-57 + 2 Accus Rechargeable 1.5v Aa Lithium Ion 3000mwh Kentli Ph5 - Rechargeable Batteries - AliExpress