Based on this product's specifications, here are some alternatives and similar models
Battery Getac ZX80 Standard 3.84V 4990mAh for Getac ZX80
Summary description:
Rechargeable replacement battery for the Getac ZX80 rugged device. Specifications: nominal voltage 3.84V and capacity 4990mAh. Designed as a standard OEM-compatible battery to restore mobile power, extend runtime, and support field use. Suitable for on-site work, travel, and professional applications where reliable battery life is required.