This item is intended for modificationTAMIYA TT02 remote-controlled carBattery case. I'm not sure if it's compatible yetTT01。

The battery in the picture is a 2S battery, which I used for the Wiltoys 12428. Its voltage is 7.4 volts, and its capacity is 1500 milliamp-hours.

Additional explanations

For best results, it is recommended to use double-sided tape for fixing, which can be purchased at inexpensive stores or hardware stores. If you want to continue using the original battery, it is recommended to use Velcro, which is easy to remove. I used Velcro purchased at an inexpensive store.