Motorola CS3300 Barcode Scanner Replacement Battery 3.7V 700mAh

Motorola CS3300 / CS3070 — 3.7V Li-ion Replacement Battery (82-133770-01)

This is a 3.7V, 700mAh Li-ion replacement battery for the Motorola CS3300 and CS3070 handheld barcode scanners. It matches OEM part number 82-133770-01 and fits the same battery bay without modification. Voltage, contact layout, and BMS communication all match the original specification.

• CS3300 and CS3070 compatibility: Both models run on the same 3.7V single-cell platform and share an identical connector pinout and BMS handshake protocol. One battery covers both units without any adapter or firmware change.
• Bench tested on actual hardware: We cycled this pack through scan-burst sequences on a CS3300 unit. The BMS held stable across rapid trigger pulls and wireless polling events, with no false low-voltage cutoffs during combined radio and imager draw.
• First-shift preparation for pick-and-pack use: After installing, seat the scanner in its charging cradle and run a full charge cycle before the first shift. The scan trigger inrush is highest when the cell is near minimum voltage — a fully charged pack prevents false BMS trips during the first burst sequence of the day.

Cradle showing a charging error on a new pack

A charging error on a freshly installed pack is almost always a contact resistance issue, not a fault with the battery or dock electronics. The CS3300 cradle reads pack state through gold-plated pogo pins, and any oxide, dust, or residue on the battery contacts raises resistance enough to trigger an error flag. Wipe the battery contacts and the cradle pins with a dry lint-free cloth, then reseat the scanner firmly until it clicks. If the error clears, the pack was not the problem — the contact surface was.

Scanner losing wireless connection during a rapid scan burst

The CS3070 transmits scan data over Bluetooth while simultaneously firing the imager on each trigger pull. That combined draw — radio transmit plus imager inrush — creates a brief voltage sag on a low or degraded cell. If the sag crosses the BMS minimum threshold, the radio stack drops and the connection resets. A fully charged, healthy cell holds above 3.4V under that combined load. If disconnects persist on a charged pack, check that the cradle completed a full cycle and verify the scanner firmware has not logged a low-voltage event.