Rechargeable Li-ion Battery AA (1.2V ,1800mAh) NI/MH

From the shop's description

Rechargeable Li-ion Battery AA (1.2V ,1800mAh) NI/MH is a high-quality electronic component designed for Arduino, prototyping, and educational electronics. AA rechargeable battery suitable for shavers & other application Ceal capacity high power battery It’s perfect for DIY makers, students, and anyone building custom electronic circuits or STEM kits.