The 856398-5201 is a battery holder contact from Keystone Electronics. It falls under the category of battery products, specifically battery holders, clips, and contacts. This contact spring is designed for solder lug termination and is suitable for cylindrical batteries. It is a custom mounting type and can accommodate multiple battery cell sizes. The temperature range for operating this contact is not specified. It is intended for single-contact battery applications. The overall package includes 100 pieces, and it is available in a bulk package. The 856398-5201 is an active product in Keystone Electronics' lineup.