Based on this product's specifications, here are some alternatives and similar models
Rechargeable Li-ion battery XTAR 16340 3.7V 850mAh — 34 mm × 16.5 mm, 1 pc
Summary description:
Single rechargeable XTAR 16340 Li‑ion battery with nominal voltage 3.7 V and capacity 850 mAh. Compact cell with diameter 16.5 mm and height 34 mm suited for flashlights, small electronics and portable devices that accept 16340 size. Provides reliable power for repeatable use; follow safety warnings and avoid exposure to direct heat.