Zebra RW420 Replacement Battery 7.4V 4200mAh Li-ion

Zebra RW420 / L405 — 7.4V Li-ion Replacement Battery (AK17463-005)

This 7.4V, 4200mAh Li-ion battery replaces OEM part AK17463-005 and CT17102-2 in the Zebra RW420, RW420 EQ, and L405 mobile thermal printers. These are rugged portable units used in retail, logistics, and field service — jobs that can't stop mid-shift for a dead battery. Capacity figure is taken directly from product data: 4200mAh / 31.08Wh.

• RW420 / L405 platform compatibility: All three fit models share the same 7.4V bus, AK17463-005 connector pinout, and BMS handshake protocol. The printer's firmware reads cell state-of-charge over the same communication line on each variant, so one battery services the full platform.
• Bench tested on actual hardware: We cycled this battery through full charge and discharge on the RW420 platform. The BMS passed authentication, current draw spiked cleanly during paper feed motor engagement, and the thermal head held stable voltage throughout the print sequence.
• First deployment print sequence: After installing, charge to 100% and run five test prints before deploying. The paper feed motor draws a brief high-current pulse on each feed cycle — this calibrates the BMS current profile to the new cell and prevents false low-battery cutoffs mid-job.

Why the RW420 won't print after sitting in a drawer

Li-ion cells self-discharge during storage. If the RW420 sat unused for several months, the battery voltage can drop below the printer's minimum motor-drive threshold — typically around 6.4V on this platform. At that voltage, the printer may power on but refuse to feed paper or fire the thermal head. Charge the battery fully before testing; if the battery won't accept a charge after 30 minutes on the dock, the BMS may have tripped into deep-discharge lockout and requires a trickle-charge recovery cycle using the OEM cradle.

Faded or uneven print on a charged battery

The thermal print head requires a steady voltage to maintain the correct burn temperature across the full print width. When a degraded battery sags under the head's current draw, temperature drops mid-line, producing faded or streaky output even though the battery indicator shows charge. This is a voltage-sag issue, not a head fault. Fit the new 4200mAh cell, run five consecutive receipts, and verify print density is consistent from edge to edge before returning the unit to service.