ニッケル水素 すいそバッテリーでしょう
nikkerusuisobatteriideshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of ニッケル水素バッテリー

1. Nickel-hydrogen battery, probably.; It's likely a nickel-hydrogen battery.

Polite
Presumptive
Conjecture