Motorola 21-62606-01 LS3578 Barcode Scanner Compatible Battery 3.7V 2600mAh

Motorola LS3578 — 3.7V Li-ion Replacement Battery (21-62606-01)

This 3.7V, 2600mAh Li-ion battery replaces the OEM 21-62606-01 pack in the Motorola LS3578 cordless barcode scanner. The LS3578 is a rugged handheld used in retail, warehouse, and field data capture. Swap this pack when the original no longer holds charge through a full work shift.

• LS3578 series compatibility: The LS3578 platform uses a single battery bay with a fixed 3.7V BMS handshake and a keyed connector that locks the pack in place. This replacement matches the voltage rail, physical footprint (68.90 × 23.56 × 22.00mm), and communication protocol the scanner expects on power-up.
• Bench tested on actual hardware: We ran this pack through the LS3578's scan-trigger and radio polling cycles on the bench. The BMS held stable under combined wireless and laser inrush loads, and the protection circuit cut correctly at the low-voltage threshold without dropping the scanner mid-session.
• First-shift prep for pick-and-pack use: After installing, seat the scanner in its charging cradle and complete a full charge cycle before heading onto the floor. Scan-trigger inrush current is highest when the cell sits near minimum state of charge — a full cell on the first shift prevents nuisance BMS trips during rapid bursts.

Why the LS3578 drops its wireless connection during rapid scan bursts

The LS3578 draws current simultaneously from two sources during a fast scan run — the laser or imager module and the 802.11 radio transmitting each result. That combined inrush can pull the cell voltage below the BMS protection threshold momentarily, causing the radio stack to reset and drop the access point association. A cell with degraded capacity hits this floor faster because its internal resistance is higher, amplifying the voltage sag. A fresh 2600mAh pack with low internal resistance keeps the combined load above the cutoff floor and holds the wireless link through burst scanning.

Cradle showing a charging error after inserting the new pack

A charging error on the cradle display usually means the dock's spring contacts aren't making clean electrical contact with the pack's gold terminals. Residual dust, anti-static film from packaging, or a slight misalignment in the bay can all raise contact resistance enough to trigger the error. Remove the pack, wipe the gold contact pads on both the battery and the cradle with a dry lint-free cloth, then reseat the pack with firm downward pressure until it clicks. If the error clears, you're charging normally — confirm by checking the cradle LED switches from red to amber within 30 seconds of seating.