Based on this product's specifications, here are some alternatives and similar models
Rechargeable Battery Pack ANSMANN 3S2P 8×18650 Li‑Ion 10.8V 5200mAh
Summary description:
Rechargeable battery pack ANSMANN 3S2P assembled from eight 18650 Li‑Ion cells, nominal voltage 10.8V and capacity 5200mAh. Designed to provide compact, high-energy power for devices requiring 10.8V input. Suitable for portable tools, LED lighting, hobby electronics and backup power; offers replaceable cell configuration and straightforward installation.