You could ask Lidl customer service. "Parkside" is the label they stick on all sorts of far eastern tat.
You could also think about replacing the battery cells themselves:
https://www.amazon.co.uk/Seilylanka-3000mAh-Parkside-Battery-self-Installation/dp/B07R13HLGB
You can probably find the same on sites like Aliexpress
Ffhh, December 2023
