Slinger Bag Oscillator Set Tennis Ball Launcher

This is a set of a tennis slinger bag and an oscillator.
I purchased the slinger bag about 4 to 5 years ago.
I use it about once every two months.
I last used it in November.
Please understand that there are some dirt and scratches.
When I used it in November, it lasted for about 1.5 hours on a full charge.
As stated on the Slinger website, I always unplugged the charger as soon as the green light indicated a full charge to avoid degrading the battery pack.

Please note that the carabiner that hooks the zipper door where the balls come out is a bit loose. Please refer to the image.

I have uploaded many images, so please judge from the images, or if you have any concerns, please ask questions before purchasing.

Regarding the oscillator, it originally retailed for ¥20,000, but I have only used it about 3 times and it has been stored away since then, so it feels like it's not moving as smoothly as it should.
There is dirt and scratches on both the bag and the main unit.
It's possible that the movement is affected by the position of the cord and its contact.
Therefore, please consider this as a bonus item.
I did test its operation, and it worked when the cord was positioned correctly.

However, please be aware that the battery drains faster when the oscillator is attached, even from the time of purchase.

Also, if you wish, I can include the balls, which are a bit deflated, in the slinger bag for shipping. Please let me know if you would like this.
The shopping cart is not included.