Symbol PDT8000 Replacement Battery 7.4V 1200mAh 21-54882-01

Symbol PDT8000 Series — 7.4V Li-ion Replacement Battery (21-54882-01)

This 7.4V, 1200mAh Li-ion cell replaces OEM part 21-54882-01 in the Symbol PDT8000 family of handheld barcode scanners. It fits the PDT8000, PDT8037, PDT8046, PDT8056, and additional models in that series. Same voltage, same connector, same BMS handshake as the original pack.

• PDT8000 series compatibility: These models share a common 7.4V battery bay, connector pinout, and BMS communication protocol. Swapping between PDT8037, PDT8046, and PDT8056 units is straightforward — the dock and the device read the pack the same way across the series.
• Bench tested on actual hardware: We ran this pack through charge and discharge cycles on PDT8000 hardware. The BMS negotiated correctly with the scanner's power management controller — no false low-battery warnings and no mid-shift cutoffs during sustained scan-and-transmit sequences.
• First-shift prep for pick-and-pack: Before the first use, seat the scanner in its cradle and complete a full charge cycle. Scan trigger inrush current spikes highest when the cell is near minimum charge. A fully charged cell on the first shift prevents the BMS from tripping on that initial surge.

Cradle showing a charging error on a new pack

New packs sometimes trigger a charging fault on first dock, even though the battery itself is fine. The most common cause is contact resistance between the pack terminals and the cradle's charge pins — oxide or residue on either surface breaks the low-level BMS handshake the dock requires before it begins the charge cycle. Wipe the battery contacts and cradle pins with a dry lint-free cloth, then reseat the scanner firmly until you hear it click. If the error clears, the contact surface was the problem, not the pack or the dock.

Scanner losing wireless connection during a rapid scan burst

During a fast scan sequence, the PDT8000 draws from the imager or laser, the processor, and the radio simultaneously. That combined inrush can pull the cell voltage down briefly, and if the BMS sees the dip as an undervoltage event, it will drop the wireless link to protect the cell. This is more likely when the pack is partially discharged. Running the battery above 50% during high-frequency scan shifts — measured by checking the scanner's battery indicator before a heavy pick run — keeps the voltage headroom above the BMS cutoff threshold.