Based on this product's specifications, here are some alternatives and similar models
Rechargeable Li-ion Battery CIPHERLAB KB16XX0X00501 3.7V 2200mAh
Summary description:
Rechargeable Li-ion battery CIPHERLAB KB16XX0X00501 provides 3.7V nominal voltage and 2200mAh capacity. Designed as a replacement or spare power source for compatible CIPHERLAB devices, it offers portable, rechargeable power for handheld scanners and mobile terminals. Use for extended field operation, reduced downtime and reliable device performance.