Symbol BTRY-LS34IAB00-00 Barcode Scanner Replacement Battery 3.7V 2200mAh

Symbol LS3478 / DS3578 Series — 3.7V Li-ion Replacement Battery (BTRY-LS34IAB00-00)

This 3.7V, 2200mAh Li-ion battery fits the Symbol LS3478, DS3478, LS3578, and DS3578 handheld barcode scanners. These are cordless laser and imager scanners used in retail point-of-sale, warehouse pick-and-pack, and inventory workflows. Capacity is 2200mAh (8.14Wh) — matched to the original pack specification.

• LS3478 / DS3578 platform fit: These models share the same battery bay dimensions, connector pinout, and BMS handshake protocol. One pack covers both the corded-style LS3478 and the Bluetooth DS3578 — the radio draw on the DS variants slightly increases current demand per scan cycle, but the cell chemistry handles both load profiles.
• Bench tested on actual hardware: We ran this pack in an LS3478 cradle and a DS3578 Bluetooth unit. The BMS accepted charge from both single-bay and multi-bay cradles without fault codes. Scan trigger inrush current stayed within cutoff thresholds across all test cycles.
• First-shift prep on the cradle: After installing, seat the scanner in its charging cradle and run a full charge cycle before use. Scan trigger inrush current peaks when the cell is near minimum — a fully charged pack prevents false BMS trips at the start of the first shift.

Cradle showing a charging error on a new pack

Multi-bay cradles used in high-throughput warehouses build up oxidation and debris on the charging contacts over time. A new pack with clean contacts sitting against dirty dock contacts creates enough resistance to trigger a charging fault. Wipe the battery contacts and the cradle dock pins with a dry cloth, then reseat the scanner firmly. The fault clears on the next charge attempt once contact resistance drops back into range.

Scanner losing wireless connection during rapid scan bursts

The DS3578 runs a Bluetooth radio and a laser or imager simultaneously during fast scan sequences. The combined inrush from both the radio polling cycle and the scan trigger can cause a momentary voltage sag on a degraded or undercharged cell, which the BMS reads as an overcurrent condition and trips. This is not a scanner firmware issue — it is a cell-state issue. Charge the pack to full before the shift and confirm the cradle LED shows a complete charge, not just a partial top-up.