Denso BHT500 Barcode Scanner Replacement Battery 3.7V 1100mAh

Denso BHT500 / BHT-1306 Series — 3.7V Li-ion Replacement Battery (BT-50L)

This 3.7V 1100mAh (4.07Wh) lithium-ion battery replaces part numbers BT-50L and BT-130LA in Denso barcode scanners. It fits the BHT500, BHT-1306, and BHT-1306BWB handheld data collection terminals used in warehouse, retail, and logistics environments. Voltage and physical dimensions match OEM spec exactly — 53.04 × 35.53 × 7.13mm.

• BHT500 / BHT-1306 platform fit: These three models share the same battery bay dimensions, connector pinout, and BMS handshake protocol, which is why a single cell covers the full group. The BT-50L and BT-130LA are OEM cross-references for the same physical pack.
• Bench tested on actual hardware: We ran this pack through charge and discharge cycles on a BHT-1306 unit. The BMS accepted charge from the cradle without fault codes, cell voltage held steady under combined scan-trigger and wireless radio draw, and protection circuits responded correctly at low-voltage cutoff.
• First shift prep for pick-and-pack use: Before the first scanning shift, seat the scanner in its cradle and run a full charge cycle. The scan trigger draws its highest inrush current when the cell is close to minimum — a fully charged pack prevents the BMS from tripping on that first burst of rapid scans.

Cradle showing 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 cell. The BHT-1306 cradle reads battery state through the dock contacts — any oxidation or debris on the pack's gold contacts interrupts that signal. Wipe the battery contacts with a dry lint-free cloth, reseat the scanner firmly in the cradle, and check that the cradle LEDs respond. If the error clears within 30 seconds, contact resistance was the cause.

Scanner losing wireless connection during rapid scan bursts

The BHT-1306BWB runs both a wireless radio and a scan trigger simultaneously — two inrush loads hitting the cell at the same moment. If the cell voltage sags below the radio's minimum operating threshold during that combined draw, the wireless stack drops and reconnects. This tends to appear mid-shift, not at the start, because cell voltage sits lower after sustained use. Charge the pack fully before each shift and check that the cell rests at 3.7V or above before entering a high-frequency scan zone.