Based on this product's specifications, here are some alternatives and similar models
Battery GTS HCK3-LI
Summary description:
The GTS HCK3-LI handheld mobile computer battery is designed for Intermec CK3 devices. With dimensions of 42 mm width, 90 mm depth, and 24.8 mm height, this black battery ensures reliable performance and longevity. It is a perfect replacement part, providing the necessary power for your mobile computing needs.