Based on this product's specifications, here are some alternatives and similar models
Battery blue star BL-4C for Nokia X2 / 6300 Li‑Ion 800 mAh replacement
Summary description:
Rechargeable blue star BL-4C Li‑Ion battery compatible with Nokia X2 and 6300 models, nominal capacity 800 mAh. Designed as a direct replacement for original BL‑4C cells, provides power for calls, messaging and basic phone functions. Compact form factor and standard contacts ensure easy installation and use in compatible mobile devices.