The Cradlepoint 170921-000 is a genuine Cradlepoint lithium-ion battery built for the Ericsson Cradlepoint E400 and E100. It is rated at 25 W discharge power and 56.62 Wh capacity. Cradlepoint also lists this part number as an accessory in the Ericsson Cradlepoint X20 data sheet. For IT teams standardizing on these platforms, ordering the manufacturer's own part number keeps the hardware bill of materials consistent across sites. The specification is simple. The chemistry is lithium-ion, the rated discharge power is 25 W and the stored energy is 56.62 Wh. Cradlepoint files the battery under its Adapters & Cables accessory family. It carries no radio or networking hardware of its own. It is a power component for the supported Cradlepoint devices listed above. Cradlepoint lists the part as active and available for North America, Europe and Asia-Pacific. That suits organizations that deploy the same E400 or E100 configuration across several regions and want one battery SKU for all of them. Each package contains one battery, and the shipping weight is 1.00 lb. Choose the 170921-000 when you are specifying a new E400 or E100 installation, stocking spares for an existing fleet, or replacing a battery with the exact manufacturer part rather than a third-party equivalent.