New, unused item. WonderSwan dedicated rechargeable battery, skeleton black.

This is a new, unused item, but its operation has not been tested.
It has been stored at home for a long time since it was received.
Please consider this if you understand the above.
How about adding it to your collection?

This is a dedicated rechargeable battery for the WonderSwan.

The capacity is 1200mAh, but due to its age, we cannot guarantee that it performs at the stated capacity.

[Brand] Sammy
[Product Name] Rechargeable Battery
[Compatible Models] WonderSwan

Thank you.