リチウムイオンバッテリーでしょう
richiumuiombatteriideshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of リチウムイオンバッテリー

1. Lithium-ion battery, probably.; It's likely a lithium-ion battery.

Polite
Presumptive
Conjecture